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It’s not a very effective aircraft.
It holds very little in the way of cargo
the interior makes a DC-9 seem like a 747. You also cannot see anything out the windows as they are about the size of an adults hand.
The fast flying times only apply to over the ocean
scrapping it was not a step backwards in any fashion
The newer aircraft are much larger, more comfortable, cost efficient, and many could similarly break the sound barrier under the right conditions.
Originally posted by waynos
to say the intention at the outset was to build a plane that carried 100 passengers at mach 2 on a regular basis and safely and all those objectives were met, AND that it was the only plane ever built to meet those objectives successfully I'd say thats pretty 'effective'.
Originally posted by waynos
Ummm, when was it ever asked to? Its a bit unfair to criticise something that was never ever given consideration in the design, I mean, an F-15 doesn't carry 250 passengers but it doesn't make it rubbish, does it?
Originally posted by waynos
For example, when flying from London to New York, over 90% of the journey is over water. This is where Concorde was supreme.
Originally posted by waynos
crossing the Atlantic at mach 2, arriving in NY *before* you set off, time wise, was well worth it and yes, losing this capability IS a step backwards.
Originally posted by waynos
Imagine if the USN's next aircraft carrier was twice as big as the current ones but was sail powereed and took several days to get anywhere. Backward step? You bet.
I mean, an F-15 doesn't carry 250 passengers but it doesn't make it rubbish, does it?
Look at all the fuss over the F-22 being able to supercruise
Originally posted by waynos
and whats this rubbish about them being able to break the sound barrier? Would the 'right conditions' you mention involve a nuclear bomb being detonated in the tail?
SuperSonic
Sounds are vibrations in an elastic medium. In gases sound travels longitudinally at different speeds, mostly depending on the molecular mass and temperature of the gas; whilst pressure has a much smaller effect. Since air temperature and composition varies significantly with altitude, mach numbers for aircraft are related to the speed of sound at sea level. In water at room temperature supersonic can be considered as any speed greater than 1,440 m/s or 4,724 ft/s. In solids, sound waves can be longitudinal or transverse and have even higher velocities.
Sound Barrier
Although the Concorde and Tu-144 were certainly the first aircraft to carry commercial passengers at supersonic speeds, they were not the first or only commercial airliners to break the sound barrier. On August 21, 1961 a Douglas DC-8 broke the sound barrier at
Mach 1.012 or 660 mph while in a controlled dive through 41,088 feet. The purpose of the flight was to collect data on a new leading-edge design for the wing. Boeing reports that the 747 broke the sound barrier during certification tests. A China Airlines 747 almost certainly broke the sound barrier in an unplanned descent from 41 000 feet to 9500 feet after an in-flight upset on 19 February 1985. It also reached over 5g. [2]
Mach Trim 757
Mach trim control is found on airplane that flies at transonic speed (at Mach 0.7 and above). A typical example is the Boeing 757. A plane would need a mach speed trim control because of the behavior of the center of pressure on its supercritical wing as the speed changes.
mach Trim 757 & 767
In low subsonic flight, the center of pressure is usually pretty stable for a conventional airfoil shape and is located about one-quarter of the way back from the wing leading edge. But as speed increases, the center of pressure begins moving aft, particularly at transonic speeds starting at about Mach 0.7. As the Cp moves aft, the moment arm between it and the elevator decreases. This movement makes the elevator less effective in providing pitch control. The difference in location between the Cp and the center of gravity (located in front of the Cp) causes the aircraft nose to pitch down, so more elevator trim is required to keep the aircraft level.
Mach Trim 737
MACH TRIM SYSTEM
MT SYSTEM MAY BE INOP IF AIRCRAFT SPEED DOES NOT EXCEED 0.74 MACH.
MT SYSTEM PROVIDES AUTOMATIC DISPLACEMENT OF ELEVATORS AS A FUNCTION OF MACH
NO IN THE MACH TUCK [NOSE DOWN] REASON.
1.TEST S/W AND FAIL LT --->P5
2.MACH TRIM COUPLER---->E1-2
3.MACH TRIM ACTUATOR--->TAIL CONE AREA
4.MT FLAP S/W ---> FLAP CONTROL UNIT
Transonic
Transonic is an aeronautics term referring to a range of velocities just below and above the speed of sound (about mach 0.8 - 1.3). It is defined as the range of speeds between the critical mach number, when some parts of the airflow over an aircraft become supersonic, and a higher speed, typically near Mach 1.2, when all of the airflow is supersonic. Between these speeds some of the airflow is supersonic, and some is not.
Most modern jet powered aircraft spend a considerable amount of time in the transonic regime.
Originally posted by waynos
To fail to be impressed by it is to have (a) no soul, or (b) no idea.
It might have fulfilled its intended mission objectives, but that does not make something successful.
In the aviation industry, the margins are so close that often a flight flies at financial deficit. For a company to rely on this aircraft for anything other then a novelty would be a financially fatal mistake.
So was it successful in its role, yes, was it effective, nope…
The only thing that this plane does that is worthy of note is that it flies fast over the areas that it is allowed to do so.
Considering that a large amount of the revenue produced by a flight is dependant on freight and mail, it makes it an ineffective unviable aircraft for normal airline operations.
I guess since BA is government subsidized, to them it makes little difference. Remember though that’s someone’s tax dollars are paying for that lost revenue.
Well the same way that 80% of the earth is water, about 80% of your flights spend as little time over that 80% as possible. Aircraft have to have a completely different set of “No-Fly’s” when they have to cross a body of water, which is an additional maintenance cost. So even if EVERY aircraft was super-sonic, they would seldom be allowed to fly that fast, and it would be an utter waste of money.
Maybe you should stop thinking about this topic in military terms, the military has a much different mission in life then a civilian airline does.
Well first the speed of sound is not a constant: .........lengthy explanation
That said, breaking the sound barrier is not something that the airlines are going to be wasting much time on in the near future, I guarantee you that.
I am afraid that when it comes to the priorities of what it takes to operate within the industry, you are the one that has no idea.
If you think being on a plane (of any description) for 8 hours or longer isn't a bind then think again. crossing the Atlantic at mach 2, arriving in NY *before* you set off, time wise, was well worth it and yes, losing this capability IS a step backwards. Imagine if the USN's next aircraft carrier was twice as big as the current ones but was sail powereed and took several days to get anywhere. Backward step? You bet.
Originally posted by Shamanator
My only point is the last time it flew it crashed and killed 113 people as far as I know granted I may be wrong but i believe that is the reason behind it's demise.
It isnt like it was scrapped for no reason It is an unsafe Airplane I'm sure they tried to fix the problem before cancelling it and failed. It wasn't an economical plane and it couldn't be guaranteed safe.
I can understand you feeling sentimental about it but seriously if it can't be made safe then it can't be made safe and i for one would not fly in it knowing that.
[edit on 21-10-2006 by Shamanator]
It guzzled fuel, couldn't carry any cargo, it was maintainence heavy,
the 20 planes built had 101 accidents,
it didn't have much flight hours (the most one plane had was almost 23000 hours over 30 years service. You could expect a 737 to get 70000 hours in the same time frame).
All them traits are terrible, and while it may have been a amazing technological leap, it certaintly wasn't a economical achievement. And THAT's what makes it a step backward from normal jets.
If it were economical, why wouldn't we all hire sr-71s for personal use? After all, it could go Mach 3? That would make lower performance Cessnas a step backward.
Originally posted by waynos
I fear I am about to be misunderstood again so just to spell it out in simple terms. The overall technology of civil aircraft has gone forward, not backwards, efficient engines, lightweight modern structures, fly by wire systems etc etc are all examples of the progression of modern technology. The backward step is purely in terms of what we can DO with it. We have been unable to replicate the abilities of Concorde in a bigger, fuel efficient replacement which is what should have happened according to historical precedent (ie every previous new form of transport). The technology of Concorde was firmly rooted in the 1960's, of course, its what we did with it that is so bloody amazing.
Well, it was 16 built actually but 101 accidents? are you sure? define what you mean by accident because these are almost entirely BFO's, which EVERY aircaft suffers and in this list of past accidents you will notice that an aircraft turning back and landing because a warning light came on in the cockpit is listed as an 'accident'.