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Joined: Thu Aug 19, 2004 8:21 am

Wingspan/Engine Size For Family Of Jets

Sat Oct 16, 2004 9:39 am

If a manufacturer produces a family of Jets such as the 737G, A318/319/320/321, 772/772ER/773, do they usually share the same wingspan/wingarea and engines?

I've heard in some of the other forums that HP will not purchase the A321 because it doesn't have the peformance necessary to operate in hot/high conditions at PHX and LAS. The reasoning I was given was that the A321 was simply a longer fuselage with the same wingspan and engine size of its smaller family jets. Is this true? Is this common? Does a larger variation of a jet suffer from lack of power and performance if they don't upgrade the engine size and wingspan? just curious?
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RE: Wingspan/Engine Size For Family Of Jets

Sat Oct 16, 2004 10:30 am

Yes and no...

The A32X series shares the same wing along with the A330 series

They share the same wing upto a point where they change the design too much and a wing change is required.

And your last few questions... Yes

If you increase the weight then to acheive the same performance as a smaller jet you have to increase the power. If you dont, you lose in performance. For alot of airlines this loss is negligible. However in HP's case the loss was a major factor
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RE: Wingspan/Engine Size For Family Of Jets

Sat Oct 16, 2004 10:00 pm

The A32X series shares the same wing along with the A330 series

The A32x wings are all the same except for the fact that the 321 has double slotted flaps in order to maintain the same low speed performance.

Since the wing is the most expensive bit to design, airframers try to get the most out of each wing. Engine power, on the other hand, varies wildly with versions.
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RE: Wingspan/Engine Size For Family Of Jets

Sun Oct 17, 2004 12:12 am

The 757-200/-300 (for Thomas Cook Airlines anyway) share the same engines (RB211-535E4 or something) but the wingspan on the -300 is 0.5m shorter than on the -200.
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