Why was Concorde never sold as a private business jet?
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Airliners like Boeing 747 and even Airbus 380 are at times considered as personal jets for extremely wealthy people. Looking from the side, Concorde was ideal for this role: while not very big, it probably could provide luxury transportation for ten VIPs or thereabout, adding to that something that looks more valuable and more exceptional than just a "flying palace" - speed like no other. New supersonic aircraft like Aerion AS2 are often seen in this role. However, it looks like rich individuals only bought various bones of Concorde after retirement.
The fate of F-BVFD looks especially strange. As I understand, it has been retired very early, in airworthy condition, just for being a surplus aircraft. After standing for many years in the open air, it deteriorated and then has been scrapped. I cannot imagine it to cost a lot during these years of standing. Why did nobody try it for personal use? Also, some pre-production aircraft have been retired after logging not so many hours and were airworthy.
Surely, Concorde uses lots of fuel, but probably the A380 burns no much less if per flight (not per passenger). And it only could fly supersonic over sea, but was surely capable of the fastest possible subsonic flight over the land.
aviation-history concorde private-jets
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show 6 more comments
$begingroup$
Airliners like Boeing 747 and even Airbus 380 are at times considered as personal jets for extremely wealthy people. Looking from the side, Concorde was ideal for this role: while not very big, it probably could provide luxury transportation for ten VIPs or thereabout, adding to that something that looks more valuable and more exceptional than just a "flying palace" - speed like no other. New supersonic aircraft like Aerion AS2 are often seen in this role. However, it looks like rich individuals only bought various bones of Concorde after retirement.
The fate of F-BVFD looks especially strange. As I understand, it has been retired very early, in airworthy condition, just for being a surplus aircraft. After standing for many years in the open air, it deteriorated and then has been scrapped. I cannot imagine it to cost a lot during these years of standing. Why did nobody try it for personal use? Also, some pre-production aircraft have been retired after logging not so many hours and were airworthy.
Surely, Concorde uses lots of fuel, but probably the A380 burns no much less if per flight (not per passenger). And it only could fly supersonic over sea, but was surely capable of the fastest possible subsonic flight over the land.
aviation-history concorde private-jets
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17
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"Concorde uses lots of fuel but probably A380 burns no much less". Depends. are you looking at "per mile", "per hour", "per flight" or "per passenger" figures?
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– Federico♦
Nov 13 '18 at 8:56
13
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"was surely capable of fastest possible subsonic flight over the land" If we're being generous, then going from M.85 to even M.99 gains you about 40 m/s, or about 150 km/h. That sounds impressive, until you consider that M.85 is already in the neighborhood of 800-900 km/h. You are effectively cutting travel time by 10%, 20% at most, and you are now rather more limited in which airports you can use so it's less likely that there will be an appropriate airport near your ultimate destination, increasing travel time on the ground. That doesn't sound like a great trade-off.
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– a CVn
Nov 13 '18 at 10:01
1
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Another plus would be cruising higher than other big jets, up to 60,000 ft.
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– vasin1987
Nov 13 '18 at 10:15
3
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@aCVn do you have a source that concorde cannot meet the said requirement?
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– vasin1987
Nov 13 '18 at 10:32
6
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@aCVn The part of 14 CFR 121.333 (e)(2) that mentions descending to 14,000 feet in less than four minutes only applies to aircraft flying at or below FL250, which Concorde (and every other passenger airliners) would generally not be doing. And that requirement is only if they don't have enough oxygen on board for 10% of the passengers to have an oxygen supply during all flight between 10,000 and 14,000 feet, which is required anyway for all aircraft flying above FL250. Also 121 CFR is for scheduled airline operations, not private business jets.
$endgroup$
– reirab
Nov 13 '18 at 19:25
|
show 6 more comments
$begingroup$
Airliners like Boeing 747 and even Airbus 380 are at times considered as personal jets for extremely wealthy people. Looking from the side, Concorde was ideal for this role: while not very big, it probably could provide luxury transportation for ten VIPs or thereabout, adding to that something that looks more valuable and more exceptional than just a "flying palace" - speed like no other. New supersonic aircraft like Aerion AS2 are often seen in this role. However, it looks like rich individuals only bought various bones of Concorde after retirement.
The fate of F-BVFD looks especially strange. As I understand, it has been retired very early, in airworthy condition, just for being a surplus aircraft. After standing for many years in the open air, it deteriorated and then has been scrapped. I cannot imagine it to cost a lot during these years of standing. Why did nobody try it for personal use? Also, some pre-production aircraft have been retired after logging not so many hours and were airworthy.
Surely, Concorde uses lots of fuel, but probably the A380 burns no much less if per flight (not per passenger). And it only could fly supersonic over sea, but was surely capable of the fastest possible subsonic flight over the land.
aviation-history concorde private-jets
$endgroup$
Airliners like Boeing 747 and even Airbus 380 are at times considered as personal jets for extremely wealthy people. Looking from the side, Concorde was ideal for this role: while not very big, it probably could provide luxury transportation for ten VIPs or thereabout, adding to that something that looks more valuable and more exceptional than just a "flying palace" - speed like no other. New supersonic aircraft like Aerion AS2 are often seen in this role. However, it looks like rich individuals only bought various bones of Concorde after retirement.
The fate of F-BVFD looks especially strange. As I understand, it has been retired very early, in airworthy condition, just for being a surplus aircraft. After standing for many years in the open air, it deteriorated and then has been scrapped. I cannot imagine it to cost a lot during these years of standing. Why did nobody try it for personal use? Also, some pre-production aircraft have been retired after logging not so many hours and were airworthy.
Surely, Concorde uses lots of fuel, but probably the A380 burns no much less if per flight (not per passenger). And it only could fly supersonic over sea, but was surely capable of the fastest possible subsonic flight over the land.
aviation-history concorde private-jets
aviation-history concorde private-jets
edited Nov 13 '18 at 21:52
Peter Mortensen
30127
30127
asked Nov 13 '18 at 8:50
h22h22
5,39912867
5,39912867
17
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"Concorde uses lots of fuel but probably A380 burns no much less". Depends. are you looking at "per mile", "per hour", "per flight" or "per passenger" figures?
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– Federico♦
Nov 13 '18 at 8:56
13
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"was surely capable of fastest possible subsonic flight over the land" If we're being generous, then going from M.85 to even M.99 gains you about 40 m/s, or about 150 km/h. That sounds impressive, until you consider that M.85 is already in the neighborhood of 800-900 km/h. You are effectively cutting travel time by 10%, 20% at most, and you are now rather more limited in which airports you can use so it's less likely that there will be an appropriate airport near your ultimate destination, increasing travel time on the ground. That doesn't sound like a great trade-off.
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– a CVn
Nov 13 '18 at 10:01
1
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Another plus would be cruising higher than other big jets, up to 60,000 ft.
$endgroup$
– vasin1987
Nov 13 '18 at 10:15
3
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@aCVn do you have a source that concorde cannot meet the said requirement?
$endgroup$
– vasin1987
Nov 13 '18 at 10:32
6
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@aCVn The part of 14 CFR 121.333 (e)(2) that mentions descending to 14,000 feet in less than four minutes only applies to aircraft flying at or below FL250, which Concorde (and every other passenger airliners) would generally not be doing. And that requirement is only if they don't have enough oxygen on board for 10% of the passengers to have an oxygen supply during all flight between 10,000 and 14,000 feet, which is required anyway for all aircraft flying above FL250. Also 121 CFR is for scheduled airline operations, not private business jets.
$endgroup$
– reirab
Nov 13 '18 at 19:25
|
show 6 more comments
17
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"Concorde uses lots of fuel but probably A380 burns no much less". Depends. are you looking at "per mile", "per hour", "per flight" or "per passenger" figures?
$endgroup$
– Federico♦
Nov 13 '18 at 8:56
13
$begingroup$
"was surely capable of fastest possible subsonic flight over the land" If we're being generous, then going from M.85 to even M.99 gains you about 40 m/s, or about 150 km/h. That sounds impressive, until you consider that M.85 is already in the neighborhood of 800-900 km/h. You are effectively cutting travel time by 10%, 20% at most, and you are now rather more limited in which airports you can use so it's less likely that there will be an appropriate airport near your ultimate destination, increasing travel time on the ground. That doesn't sound like a great trade-off.
$endgroup$
– a CVn
Nov 13 '18 at 10:01
1
$begingroup$
Another plus would be cruising higher than other big jets, up to 60,000 ft.
$endgroup$
– vasin1987
Nov 13 '18 at 10:15
3
$begingroup$
@aCVn do you have a source that concorde cannot meet the said requirement?
$endgroup$
– vasin1987
Nov 13 '18 at 10:32
6
$begingroup$
@aCVn The part of 14 CFR 121.333 (e)(2) that mentions descending to 14,000 feet in less than four minutes only applies to aircraft flying at or below FL250, which Concorde (and every other passenger airliners) would generally not be doing. And that requirement is only if they don't have enough oxygen on board for 10% of the passengers to have an oxygen supply during all flight between 10,000 and 14,000 feet, which is required anyway for all aircraft flying above FL250. Also 121 CFR is for scheduled airline operations, not private business jets.
$endgroup$
– reirab
Nov 13 '18 at 19:25
17
17
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"Concorde uses lots of fuel but probably A380 burns no much less". Depends. are you looking at "per mile", "per hour", "per flight" or "per passenger" figures?
$endgroup$
– Federico♦
Nov 13 '18 at 8:56
$begingroup$
"Concorde uses lots of fuel but probably A380 burns no much less". Depends. are you looking at "per mile", "per hour", "per flight" or "per passenger" figures?
$endgroup$
– Federico♦
Nov 13 '18 at 8:56
13
13
$begingroup$
"was surely capable of fastest possible subsonic flight over the land" If we're being generous, then going from M.85 to even M.99 gains you about 40 m/s, or about 150 km/h. That sounds impressive, until you consider that M.85 is already in the neighborhood of 800-900 km/h. You are effectively cutting travel time by 10%, 20% at most, and you are now rather more limited in which airports you can use so it's less likely that there will be an appropriate airport near your ultimate destination, increasing travel time on the ground. That doesn't sound like a great trade-off.
$endgroup$
– a CVn
Nov 13 '18 at 10:01
$begingroup$
"was surely capable of fastest possible subsonic flight over the land" If we're being generous, then going from M.85 to even M.99 gains you about 40 m/s, or about 150 km/h. That sounds impressive, until you consider that M.85 is already in the neighborhood of 800-900 km/h. You are effectively cutting travel time by 10%, 20% at most, and you are now rather more limited in which airports you can use so it's less likely that there will be an appropriate airport near your ultimate destination, increasing travel time on the ground. That doesn't sound like a great trade-off.
$endgroup$
– a CVn
Nov 13 '18 at 10:01
1
1
$begingroup$
Another plus would be cruising higher than other big jets, up to 60,000 ft.
$endgroup$
– vasin1987
Nov 13 '18 at 10:15
$begingroup$
Another plus would be cruising higher than other big jets, up to 60,000 ft.
$endgroup$
– vasin1987
Nov 13 '18 at 10:15
3
3
$begingroup$
@aCVn do you have a source that concorde cannot meet the said requirement?
$endgroup$
– vasin1987
Nov 13 '18 at 10:32
$begingroup$
@aCVn do you have a source that concorde cannot meet the said requirement?
$endgroup$
– vasin1987
Nov 13 '18 at 10:32
6
6
$begingroup$
@aCVn The part of 14 CFR 121.333 (e)(2) that mentions descending to 14,000 feet in less than four minutes only applies to aircraft flying at or below FL250, which Concorde (and every other passenger airliners) would generally not be doing. And that requirement is only if they don't have enough oxygen on board for 10% of the passengers to have an oxygen supply during all flight between 10,000 and 14,000 feet, which is required anyway for all aircraft flying above FL250. Also 121 CFR is for scheduled airline operations, not private business jets.
$endgroup$
– reirab
Nov 13 '18 at 19:25
$begingroup$
@aCVn The part of 14 CFR 121.333 (e)(2) that mentions descending to 14,000 feet in less than four minutes only applies to aircraft flying at or below FL250, which Concorde (and every other passenger airliners) would generally not be doing. And that requirement is only if they don't have enough oxygen on board for 10% of the passengers to have an oxygen supply during all flight between 10,000 and 14,000 feet, which is required anyway for all aircraft flying above FL250. Also 121 CFR is for scheduled airline operations, not private business jets.
$endgroup$
– reirab
Nov 13 '18 at 19:25
|
show 6 more comments
4 Answers
4
active
oldest
votes
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Private business jets have a few requirements:
Operational costs must be within budget. The concorde is pretty expensive to run as demonstrated by the high ticketprices you had to pay for a trip on one of them. Fuel is only part of that costs; maintenance is a pretty big part of that as well.
Be able to land and take off close to where the CEO has his meeting. This means making use of small airfields with their short runways and noise restrictions. Concorde needed a lot of runway and was not a quiet plane.
Account for airfields sometimes not having fuel available or the fuel being too expensive. This may mean doing the roundtrip on a single tank or doing another short hop to an airfield with fuel.
Business jets would also mostly operate on a domestic scale. Doing mostly short hops where the concorde would not even reach supersonic cruise altitude before it's over the destination. While plenty of business jets can easily do 0.75 mach which is already 3/4 the speed of sound.
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11
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In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
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– Mark
Nov 13 '18 at 20:44
15
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@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
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– Mołot
Nov 13 '18 at 23:18
3
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Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
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– Robert DiGiovanni
Nov 14 '18 at 0:33
2
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plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
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– jwenting
Nov 14 '18 at 5:02
5
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I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
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– Fattie
Nov 15 '18 at 4:27
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show 5 more comments
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While it was never explicitly sold as such (although BAE would have happily delivered it as such) it was operated in such a manner on many occasions. As detailed by this former pilot of the Concorde, the plane regularly flew as a charter with small passenger loads of VIPs often. So even though no one ever owned it specifically for private business it served that purpose quite well.
There was also not a huge reason to own it privately for business as that was to be its main market. Glitz and glam aside, the Concorde was a serious way for American and European based entities to have a face-to-face meeting on either turf and still be home for dinner. Offloading the maintenance and ownership to an airline was a nice plus.
Some people also speculate that the ultimately canceled Iranian order by the then Shah was perhaps for his personal use:
I can’t blame Iran for canceling their orders, as like most airlines
at the time, Iran Air was more a symbol of national identity, and the
Concorde’s were most certainly toys for the Shah rather than aircraft
for his people. Still, it’s a pity nonetherless.
Although they never bought the whole aircraft, Pepsi did buy the rights to paint one of the Concordes.
It's also worth noting that Concordes sales occurred mostly in the mid 1960s (approximately 24 minutes in) a time in which business aircraft were different than what we currently think of. Commercial flying was still a fancier affair than it is now and lots of business individuals flew commercial. Smaller private planes lived more in the propeller-driven space than the jet space. Keep in mind the Lear 23 had also just come out and the whole space of business/private jets was quite literally in the process of being defined. It would not be until 1972 that we would even start to see rock stars toted around in private jets. The late 1960s and early 1970s were pretty much considered the haydays of general aviation as post-war pilots were in a position to buy planes. The focus in the private market was heavily on selling single-engine piston planes.
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1
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This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
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– Fattie
Nov 15 '18 at 4:30
add a comment |
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At the time the jet was in production private jets were still in their infancy. The largest purpose built one was the Grumman Gulfstream II. I have a feeling the Concorde was a bit out of the reach of all firms at the time.
In addition by the time the SST had gone into full production, it had largely fallen out of disfavor for noise and environmental reasons. Concorde was also, dimensionally a big airplane with a length over 200 ft, making it awkward and unruly to maneuver at many smaller airports. It also had a gross takeoff weight of over 400,000 lbs, again limiting what runways it can fly from. Supersonic aircraft also don’t typically feature good short field capabilities which limits the airports you could fly a Concorde into and out of. SUD/BAC quoted a balanced field length at STP for the Concorde of 9400 ft. That really limits where where you can fly from.
So unpopular was the SST by 1980 that SUD/BAC had only produced a total of 14 production Concordes, all earmarked for either British Airways or Air France. Most likely all of these factors combined together deterred even the most rabid buyer.
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4
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` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
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– Antzi
Nov 14 '18 at 0:35
3
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Fallen out of disfavor sounds like a good thing to me
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– quiet flyer
Nov 14 '18 at 2:52
1
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I guess you gotta ask the people who voted for it.
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– Carlo Felicione
Nov 15 '18 at 8:34
1
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You're probably right, @ChrisHayes !
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– Fattie
Nov 16 '18 at 5:08
add a comment |
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Another factor to consider: Aircraft require a lot of support. It's not enough to just sell a few aircraft. There's support that must be factored in - spare parts, training of maintenance crews, etc.
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1
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Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
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– Stilez
Nov 14 '18 at 21:25
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Private business jets have a few requirements:
Operational costs must be within budget. The concorde is pretty expensive to run as demonstrated by the high ticketprices you had to pay for a trip on one of them. Fuel is only part of that costs; maintenance is a pretty big part of that as well.
Be able to land and take off close to where the CEO has his meeting. This means making use of small airfields with their short runways and noise restrictions. Concorde needed a lot of runway and was not a quiet plane.
Account for airfields sometimes not having fuel available or the fuel being too expensive. This may mean doing the roundtrip on a single tank or doing another short hop to an airfield with fuel.
Business jets would also mostly operate on a domestic scale. Doing mostly short hops where the concorde would not even reach supersonic cruise altitude before it's over the destination. While plenty of business jets can easily do 0.75 mach which is already 3/4 the speed of sound.
$endgroup$
11
$begingroup$
In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
$endgroup$
– Mark
Nov 13 '18 at 20:44
15
$begingroup$
@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
$endgroup$
– Mołot
Nov 13 '18 at 23:18
3
$begingroup$
Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
$endgroup$
– Robert DiGiovanni
Nov 14 '18 at 0:33
2
$begingroup$
plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
$endgroup$
– jwenting
Nov 14 '18 at 5:02
5
$begingroup$
I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
$endgroup$
– Fattie
Nov 15 '18 at 4:27
|
show 5 more comments
$begingroup$
Private business jets have a few requirements:
Operational costs must be within budget. The concorde is pretty expensive to run as demonstrated by the high ticketprices you had to pay for a trip on one of them. Fuel is only part of that costs; maintenance is a pretty big part of that as well.
Be able to land and take off close to where the CEO has his meeting. This means making use of small airfields with their short runways and noise restrictions. Concorde needed a lot of runway and was not a quiet plane.
Account for airfields sometimes not having fuel available or the fuel being too expensive. This may mean doing the roundtrip on a single tank or doing another short hop to an airfield with fuel.
Business jets would also mostly operate on a domestic scale. Doing mostly short hops where the concorde would not even reach supersonic cruise altitude before it's over the destination. While plenty of business jets can easily do 0.75 mach which is already 3/4 the speed of sound.
$endgroup$
11
$begingroup$
In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
$endgroup$
– Mark
Nov 13 '18 at 20:44
15
$begingroup$
@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
$endgroup$
– Mołot
Nov 13 '18 at 23:18
3
$begingroup$
Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
$endgroup$
– Robert DiGiovanni
Nov 14 '18 at 0:33
2
$begingroup$
plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
$endgroup$
– jwenting
Nov 14 '18 at 5:02
5
$begingroup$
I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
$endgroup$
– Fattie
Nov 15 '18 at 4:27
|
show 5 more comments
$begingroup$
Private business jets have a few requirements:
Operational costs must be within budget. The concorde is pretty expensive to run as demonstrated by the high ticketprices you had to pay for a trip on one of them. Fuel is only part of that costs; maintenance is a pretty big part of that as well.
Be able to land and take off close to where the CEO has his meeting. This means making use of small airfields with their short runways and noise restrictions. Concorde needed a lot of runway and was not a quiet plane.
Account for airfields sometimes not having fuel available or the fuel being too expensive. This may mean doing the roundtrip on a single tank or doing another short hop to an airfield with fuel.
Business jets would also mostly operate on a domestic scale. Doing mostly short hops where the concorde would not even reach supersonic cruise altitude before it's over the destination. While plenty of business jets can easily do 0.75 mach which is already 3/4 the speed of sound.
$endgroup$
Private business jets have a few requirements:
Operational costs must be within budget. The concorde is pretty expensive to run as demonstrated by the high ticketprices you had to pay for a trip on one of them. Fuel is only part of that costs; maintenance is a pretty big part of that as well.
Be able to land and take off close to where the CEO has his meeting. This means making use of small airfields with their short runways and noise restrictions. Concorde needed a lot of runway and was not a quiet plane.
Account for airfields sometimes not having fuel available or the fuel being too expensive. This may mean doing the roundtrip on a single tank or doing another short hop to an airfield with fuel.
Business jets would also mostly operate on a domestic scale. Doing mostly short hops where the concorde would not even reach supersonic cruise altitude before it's over the destination. While plenty of business jets can easily do 0.75 mach which is already 3/4 the speed of sound.
answered Nov 13 '18 at 12:20
ratchet freakratchet freak
23.8k465128
23.8k465128
11
$begingroup$
In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
$endgroup$
– Mark
Nov 13 '18 at 20:44
15
$begingroup$
@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
$endgroup$
– Mołot
Nov 13 '18 at 23:18
3
$begingroup$
Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
$endgroup$
– Robert DiGiovanni
Nov 14 '18 at 0:33
2
$begingroup$
plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
$endgroup$
– jwenting
Nov 14 '18 at 5:02
5
$begingroup$
I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
$endgroup$
– Fattie
Nov 15 '18 at 4:27
|
show 5 more comments
11
$begingroup$
In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
$endgroup$
– Mark
Nov 13 '18 at 20:44
15
$begingroup$
@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
$endgroup$
– Mołot
Nov 13 '18 at 23:18
3
$begingroup$
Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
$endgroup$
– Robert DiGiovanni
Nov 14 '18 at 0:33
2
$begingroup$
plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
$endgroup$
– jwenting
Nov 14 '18 at 5:02
5
$begingroup$
I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
$endgroup$
– Fattie
Nov 15 '18 at 4:27
11
11
$begingroup$
In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
$endgroup$
– Mark
Nov 13 '18 at 20:44
$begingroup$
In short, the only likely market for a private Concorde is people interested in owning a Concorde as a status symbol. That's what, a half-dozen oil sheiks and one or two airplane collectors?
$endgroup$
– Mark
Nov 13 '18 at 20:44
15
15
$begingroup$
@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
$endgroup$
– Mołot
Nov 13 '18 at 23:18
$begingroup$
@Mark Given that 20 Concordes were built and 14 entered airline service, market for 8 more is substantial. On Concorde scale, 8 is huge, contrary to how it appears.
$endgroup$
– Mołot
Nov 13 '18 at 23:18
3
3
$begingroup$
Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
$endgroup$
– Robert DiGiovanni
Nov 14 '18 at 0:33
$begingroup$
Would have to research whether or not there are limitations on private sales due to possible military/terrorist applications. Sort of like having your own personal nuclear submarine. Shame they are all retired, but with cheaper and more plentiful fuel, and with respect to the ozone layer and sonic booms, they may be seen again!
$endgroup$
– Robert DiGiovanni
Nov 14 '18 at 0:33
2
2
$begingroup$
plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
$endgroup$
– jwenting
Nov 14 '18 at 5:02
$begingroup$
plus crew and training availability. Concorde trained pilots were pretty rare, those without a solid and well paying job at BA or AF even more so. And as those airlines controlled the only training facilities as well there was no real way to change that. Of course had Concorde become the economic success it was hoped to be that'd have been different.
$endgroup$
– jwenting
Nov 14 '18 at 5:02
5
5
$begingroup$
I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
$endgroup$
– Fattie
Nov 15 '18 at 4:27
$begingroup$
I am afraid to say this answer is, unfortunately, absolutely pointless! :O Note that the three points made, absolutely apply identically to 747s, 380s as well. :O Sorry!
$endgroup$
– Fattie
Nov 15 '18 at 4:27
|
show 5 more comments
$begingroup$
While it was never explicitly sold as such (although BAE would have happily delivered it as such) it was operated in such a manner on many occasions. As detailed by this former pilot of the Concorde, the plane regularly flew as a charter with small passenger loads of VIPs often. So even though no one ever owned it specifically for private business it served that purpose quite well.
There was also not a huge reason to own it privately for business as that was to be its main market. Glitz and glam aside, the Concorde was a serious way for American and European based entities to have a face-to-face meeting on either turf and still be home for dinner. Offloading the maintenance and ownership to an airline was a nice plus.
Some people also speculate that the ultimately canceled Iranian order by the then Shah was perhaps for his personal use:
I can’t blame Iran for canceling their orders, as like most airlines
at the time, Iran Air was more a symbol of national identity, and the
Concorde’s were most certainly toys for the Shah rather than aircraft
for his people. Still, it’s a pity nonetherless.
Although they never bought the whole aircraft, Pepsi did buy the rights to paint one of the Concordes.
It's also worth noting that Concordes sales occurred mostly in the mid 1960s (approximately 24 minutes in) a time in which business aircraft were different than what we currently think of. Commercial flying was still a fancier affair than it is now and lots of business individuals flew commercial. Smaller private planes lived more in the propeller-driven space than the jet space. Keep in mind the Lear 23 had also just come out and the whole space of business/private jets was quite literally in the process of being defined. It would not be until 1972 that we would even start to see rock stars toted around in private jets. The late 1960s and early 1970s were pretty much considered the haydays of general aviation as post-war pilots were in a position to buy planes. The focus in the private market was heavily on selling single-engine piston planes.
$endgroup$
1
$begingroup$
This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
$endgroup$
– Fattie
Nov 15 '18 at 4:30
add a comment |
$begingroup$
While it was never explicitly sold as such (although BAE would have happily delivered it as such) it was operated in such a manner on many occasions. As detailed by this former pilot of the Concorde, the plane regularly flew as a charter with small passenger loads of VIPs often. So even though no one ever owned it specifically for private business it served that purpose quite well.
There was also not a huge reason to own it privately for business as that was to be its main market. Glitz and glam aside, the Concorde was a serious way for American and European based entities to have a face-to-face meeting on either turf and still be home for dinner. Offloading the maintenance and ownership to an airline was a nice plus.
Some people also speculate that the ultimately canceled Iranian order by the then Shah was perhaps for his personal use:
I can’t blame Iran for canceling their orders, as like most airlines
at the time, Iran Air was more a symbol of national identity, and the
Concorde’s were most certainly toys for the Shah rather than aircraft
for his people. Still, it’s a pity nonetherless.
Although they never bought the whole aircraft, Pepsi did buy the rights to paint one of the Concordes.
It's also worth noting that Concordes sales occurred mostly in the mid 1960s (approximately 24 minutes in) a time in which business aircraft were different than what we currently think of. Commercial flying was still a fancier affair than it is now and lots of business individuals flew commercial. Smaller private planes lived more in the propeller-driven space than the jet space. Keep in mind the Lear 23 had also just come out and the whole space of business/private jets was quite literally in the process of being defined. It would not be until 1972 that we would even start to see rock stars toted around in private jets. The late 1960s and early 1970s were pretty much considered the haydays of general aviation as post-war pilots were in a position to buy planes. The focus in the private market was heavily on selling single-engine piston planes.
$endgroup$
1
$begingroup$
This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
$endgroup$
– Fattie
Nov 15 '18 at 4:30
add a comment |
$begingroup$
While it was never explicitly sold as such (although BAE would have happily delivered it as such) it was operated in such a manner on many occasions. As detailed by this former pilot of the Concorde, the plane regularly flew as a charter with small passenger loads of VIPs often. So even though no one ever owned it specifically for private business it served that purpose quite well.
There was also not a huge reason to own it privately for business as that was to be its main market. Glitz and glam aside, the Concorde was a serious way for American and European based entities to have a face-to-face meeting on either turf and still be home for dinner. Offloading the maintenance and ownership to an airline was a nice plus.
Some people also speculate that the ultimately canceled Iranian order by the then Shah was perhaps for his personal use:
I can’t blame Iran for canceling their orders, as like most airlines
at the time, Iran Air was more a symbol of national identity, and the
Concorde’s were most certainly toys for the Shah rather than aircraft
for his people. Still, it’s a pity nonetherless.
Although they never bought the whole aircraft, Pepsi did buy the rights to paint one of the Concordes.
It's also worth noting that Concordes sales occurred mostly in the mid 1960s (approximately 24 minutes in) a time in which business aircraft were different than what we currently think of. Commercial flying was still a fancier affair than it is now and lots of business individuals flew commercial. Smaller private planes lived more in the propeller-driven space than the jet space. Keep in mind the Lear 23 had also just come out and the whole space of business/private jets was quite literally in the process of being defined. It would not be until 1972 that we would even start to see rock stars toted around in private jets. The late 1960s and early 1970s were pretty much considered the haydays of general aviation as post-war pilots were in a position to buy planes. The focus in the private market was heavily on selling single-engine piston planes.
$endgroup$
While it was never explicitly sold as such (although BAE would have happily delivered it as such) it was operated in such a manner on many occasions. As detailed by this former pilot of the Concorde, the plane regularly flew as a charter with small passenger loads of VIPs often. So even though no one ever owned it specifically for private business it served that purpose quite well.
There was also not a huge reason to own it privately for business as that was to be its main market. Glitz and glam aside, the Concorde was a serious way for American and European based entities to have a face-to-face meeting on either turf and still be home for dinner. Offloading the maintenance and ownership to an airline was a nice plus.
Some people also speculate that the ultimately canceled Iranian order by the then Shah was perhaps for his personal use:
I can’t blame Iran for canceling their orders, as like most airlines
at the time, Iran Air was more a symbol of national identity, and the
Concorde’s were most certainly toys for the Shah rather than aircraft
for his people. Still, it’s a pity nonetherless.
Although they never bought the whole aircraft, Pepsi did buy the rights to paint one of the Concordes.
It's also worth noting that Concordes sales occurred mostly in the mid 1960s (approximately 24 minutes in) a time in which business aircraft were different than what we currently think of. Commercial flying was still a fancier affair than it is now and lots of business individuals flew commercial. Smaller private planes lived more in the propeller-driven space than the jet space. Keep in mind the Lear 23 had also just come out and the whole space of business/private jets was quite literally in the process of being defined. It would not be until 1972 that we would even start to see rock stars toted around in private jets. The late 1960s and early 1970s were pretty much considered the haydays of general aviation as post-war pilots were in a position to buy planes. The focus in the private market was heavily on selling single-engine piston planes.
edited Nov 13 '18 at 19:41
Peter Mortensen
30127
30127
answered Nov 13 '18 at 14:32
DaveDave
64.3k4117233
64.3k4117233
1
$begingroup$
This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
$endgroup$
– Fattie
Nov 15 '18 at 4:30
add a comment |
1
$begingroup$
This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
$endgroup$
– Fattie
Nov 15 '18 at 4:30
1
1
$begingroup$
This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
$endgroup$
– Fattie
Nov 15 '18 at 4:30
$begingroup$
This is the more sensible answer. Basically the question is "If 747s, 380s, why not Concorde?" Indeed, very large airliners were not private craft back in the 60s.
$endgroup$
– Fattie
Nov 15 '18 at 4:30
add a comment |
$begingroup$
At the time the jet was in production private jets were still in their infancy. The largest purpose built one was the Grumman Gulfstream II. I have a feeling the Concorde was a bit out of the reach of all firms at the time.
In addition by the time the SST had gone into full production, it had largely fallen out of disfavor for noise and environmental reasons. Concorde was also, dimensionally a big airplane with a length over 200 ft, making it awkward and unruly to maneuver at many smaller airports. It also had a gross takeoff weight of over 400,000 lbs, again limiting what runways it can fly from. Supersonic aircraft also don’t typically feature good short field capabilities which limits the airports you could fly a Concorde into and out of. SUD/BAC quoted a balanced field length at STP for the Concorde of 9400 ft. That really limits where where you can fly from.
So unpopular was the SST by 1980 that SUD/BAC had only produced a total of 14 production Concordes, all earmarked for either British Airways or Air France. Most likely all of these factors combined together deterred even the most rabid buyer.
$endgroup$
4
$begingroup$
` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
$endgroup$
– Antzi
Nov 14 '18 at 0:35
3
$begingroup$
Fallen out of disfavor sounds like a good thing to me
$endgroup$
– quiet flyer
Nov 14 '18 at 2:52
1
$begingroup$
I guess you gotta ask the people who voted for it.
$endgroup$
– Carlo Felicione
Nov 15 '18 at 8:34
1
$begingroup$
You're probably right, @ChrisHayes !
$endgroup$
– Fattie
Nov 16 '18 at 5:08
add a comment |
$begingroup$
At the time the jet was in production private jets were still in their infancy. The largest purpose built one was the Grumman Gulfstream II. I have a feeling the Concorde was a bit out of the reach of all firms at the time.
In addition by the time the SST had gone into full production, it had largely fallen out of disfavor for noise and environmental reasons. Concorde was also, dimensionally a big airplane with a length over 200 ft, making it awkward and unruly to maneuver at many smaller airports. It also had a gross takeoff weight of over 400,000 lbs, again limiting what runways it can fly from. Supersonic aircraft also don’t typically feature good short field capabilities which limits the airports you could fly a Concorde into and out of. SUD/BAC quoted a balanced field length at STP for the Concorde of 9400 ft. That really limits where where you can fly from.
So unpopular was the SST by 1980 that SUD/BAC had only produced a total of 14 production Concordes, all earmarked for either British Airways or Air France. Most likely all of these factors combined together deterred even the most rabid buyer.
$endgroup$
4
$begingroup$
` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
$endgroup$
– Antzi
Nov 14 '18 at 0:35
3
$begingroup$
Fallen out of disfavor sounds like a good thing to me
$endgroup$
– quiet flyer
Nov 14 '18 at 2:52
1
$begingroup$
I guess you gotta ask the people who voted for it.
$endgroup$
– Carlo Felicione
Nov 15 '18 at 8:34
1
$begingroup$
You're probably right, @ChrisHayes !
$endgroup$
– Fattie
Nov 16 '18 at 5:08
add a comment |
$begingroup$
At the time the jet was in production private jets were still in their infancy. The largest purpose built one was the Grumman Gulfstream II. I have a feeling the Concorde was a bit out of the reach of all firms at the time.
In addition by the time the SST had gone into full production, it had largely fallen out of disfavor for noise and environmental reasons. Concorde was also, dimensionally a big airplane with a length over 200 ft, making it awkward and unruly to maneuver at many smaller airports. It also had a gross takeoff weight of over 400,000 lbs, again limiting what runways it can fly from. Supersonic aircraft also don’t typically feature good short field capabilities which limits the airports you could fly a Concorde into and out of. SUD/BAC quoted a balanced field length at STP for the Concorde of 9400 ft. That really limits where where you can fly from.
So unpopular was the SST by 1980 that SUD/BAC had only produced a total of 14 production Concordes, all earmarked for either British Airways or Air France. Most likely all of these factors combined together deterred even the most rabid buyer.
$endgroup$
At the time the jet was in production private jets were still in their infancy. The largest purpose built one was the Grumman Gulfstream II. I have a feeling the Concorde was a bit out of the reach of all firms at the time.
In addition by the time the SST had gone into full production, it had largely fallen out of disfavor for noise and environmental reasons. Concorde was also, dimensionally a big airplane with a length over 200 ft, making it awkward and unruly to maneuver at many smaller airports. It also had a gross takeoff weight of over 400,000 lbs, again limiting what runways it can fly from. Supersonic aircraft also don’t typically feature good short field capabilities which limits the airports you could fly a Concorde into and out of. SUD/BAC quoted a balanced field length at STP for the Concorde of 9400 ft. That really limits where where you can fly from.
So unpopular was the SST by 1980 that SUD/BAC had only produced a total of 14 production Concordes, all earmarked for either British Airways or Air France. Most likely all of these factors combined together deterred even the most rabid buyer.
edited Nov 14 '18 at 3:17
answered Nov 13 '18 at 18:34
Carlo FelicioneCarlo Felicione
41.5k376151
41.5k376151
4
$begingroup$
` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
$endgroup$
– Antzi
Nov 14 '18 at 0:35
3
$begingroup$
Fallen out of disfavor sounds like a good thing to me
$endgroup$
– quiet flyer
Nov 14 '18 at 2:52
1
$begingroup$
I guess you gotta ask the people who voted for it.
$endgroup$
– Carlo Felicione
Nov 15 '18 at 8:34
1
$begingroup$
You're probably right, @ChrisHayes !
$endgroup$
– Fattie
Nov 16 '18 at 5:08
add a comment |
4
$begingroup$
` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
$endgroup$
– Antzi
Nov 14 '18 at 0:35
3
$begingroup$
Fallen out of disfavor sounds like a good thing to me
$endgroup$
– quiet flyer
Nov 14 '18 at 2:52
1
$begingroup$
I guess you gotta ask the people who voted for it.
$endgroup$
– Carlo Felicione
Nov 15 '18 at 8:34
1
$begingroup$
You're probably right, @ChrisHayes !
$endgroup$
– Fattie
Nov 16 '18 at 5:08
4
4
$begingroup$
` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
$endgroup$
– Antzi
Nov 14 '18 at 0:35
$begingroup$
` the Concorde was a bit out of the reach of all firms at the time.` I feel that this is the real answer. 40 years of continual growth for enterprises mean that firms and individuals are MUCH MUCH richer now
$endgroup$
– Antzi
Nov 14 '18 at 0:35
3
3
$begingroup$
Fallen out of disfavor sounds like a good thing to me
$endgroup$
– quiet flyer
Nov 14 '18 at 2:52
$begingroup$
Fallen out of disfavor sounds like a good thing to me
$endgroup$
– quiet flyer
Nov 14 '18 at 2:52
1
1
$begingroup$
I guess you gotta ask the people who voted for it.
$endgroup$
– Carlo Felicione
Nov 15 '18 at 8:34
$begingroup$
I guess you gotta ask the people who voted for it.
$endgroup$
– Carlo Felicione
Nov 15 '18 at 8:34
1
1
$begingroup$
You're probably right, @ChrisHayes !
$endgroup$
– Fattie
Nov 16 '18 at 5:08
$begingroup$
You're probably right, @ChrisHayes !
$endgroup$
– Fattie
Nov 16 '18 at 5:08
add a comment |
$begingroup$
Another factor to consider: Aircraft require a lot of support. It's not enough to just sell a few aircraft. There's support that must be factored in - spare parts, training of maintenance crews, etc.
$endgroup$
1
$begingroup$
Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
$endgroup$
– Stilez
Nov 14 '18 at 21:25
add a comment |
$begingroup$
Another factor to consider: Aircraft require a lot of support. It's not enough to just sell a few aircraft. There's support that must be factored in - spare parts, training of maintenance crews, etc.
$endgroup$
1
$begingroup$
Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
$endgroup$
– Stilez
Nov 14 '18 at 21:25
add a comment |
$begingroup$
Another factor to consider: Aircraft require a lot of support. It's not enough to just sell a few aircraft. There's support that must be factored in - spare parts, training of maintenance crews, etc.
$endgroup$
Another factor to consider: Aircraft require a lot of support. It's not enough to just sell a few aircraft. There's support that must be factored in - spare parts, training of maintenance crews, etc.
answered Nov 13 '18 at 18:29
CrayoneaterCrayoneater
711
711
1
$begingroup$
Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
$endgroup$
– Stilez
Nov 14 '18 at 21:25
add a comment |
1
$begingroup$
Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
$endgroup$
– Stilez
Nov 14 '18 at 21:25
1
1
$begingroup$
Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
$endgroup$
– Stilez
Nov 14 '18 at 21:25
$begingroup$
Note that this requires an entire support line - if a widget in an engine goes, you need the technical specialists, service crew, and manufacturing supply lines, to fix or replace it. If those won't exist any more, or aren't economical for the aircraft still in private service, then that's the end of it.
$endgroup$
– Stilez
Nov 14 '18 at 21:25
add a comment |
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"Concorde uses lots of fuel but probably A380 burns no much less". Depends. are you looking at "per mile", "per hour", "per flight" or "per passenger" figures?
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– Federico♦
Nov 13 '18 at 8:56
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"was surely capable of fastest possible subsonic flight over the land" If we're being generous, then going from M.85 to even M.99 gains you about 40 m/s, or about 150 km/h. That sounds impressive, until you consider that M.85 is already in the neighborhood of 800-900 km/h. You are effectively cutting travel time by 10%, 20% at most, and you are now rather more limited in which airports you can use so it's less likely that there will be an appropriate airport near your ultimate destination, increasing travel time on the ground. That doesn't sound like a great trade-off.
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– a CVn
Nov 13 '18 at 10:01
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Another plus would be cruising higher than other big jets, up to 60,000 ft.
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– vasin1987
Nov 13 '18 at 10:15
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@aCVn do you have a source that concorde cannot meet the said requirement?
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– vasin1987
Nov 13 '18 at 10:32
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@aCVn The part of 14 CFR 121.333 (e)(2) that mentions descending to 14,000 feet in less than four minutes only applies to aircraft flying at or below FL250, which Concorde (and every other passenger airliners) would generally not be doing. And that requirement is only if they don't have enough oxygen on board for 10% of the passengers to have an oxygen supply during all flight between 10,000 and 14,000 feet, which is required anyway for all aircraft flying above FL250. Also 121 CFR is for scheduled airline operations, not private business jets.
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– reirab
Nov 13 '18 at 19:25