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Questions about the different choices that aircraft designers (typically aerospace engineers) make in order to create an aircraft.
27
votes
Accepted
Why does the 757 fuselage bend more on turbulence than those of other airplanes?
This is really two questions
Why does a fuselage bend?
Why does the 757 fuselage bend more than others
I'll give the simple answers here. You can go into a LOT of detail, but the detailed answers …
1
vote
Are the military tilted-thrust aircraft in the film Avatar feasible?
Yes, they are certainly feasible. In fact, one basically exists already: the V-22 Osprey.
The main difference being that the V-22 has ailerons for roll control and wings for lift in forward flight.
…
37
votes
Why are there no longer any biplanes?
Firstly, there are:
For example this company currently makes a biplane
But the main reason is that they're inefficient, and don't really do much that a monoplane can't.
They produce a lot of drag comp …
4
votes
Are there cases where a double horizontal stabilizer is useful?
Do they have a nefarious super-weapon in the rear of the fuselage? That could necessitate the extra lift and, more importantly, the shifting of that lift further back to keep the centre of lift near t …
6
votes
Why are First/Business Class seats at the front of aircraft where it is the least safe?
Because, like in so much else, we trade off safety for convenience.
Why fly at all, if you want to be inconvenienced, but safer? Okay you couldn't get where you're going, but it's (almost) impossible …
9
votes
How do propeller-driven, fixed-wing UAVs counter negative torque from engine rotation?
In exactly the same way as any conventional, single-prop aircraft does
Which is to say, by using stabilizer and aileron/rudder trim, and the natural resistance that wings/stabilizers give.
The wings …
1
vote
Airbus is to fly-by-wire as Boeing is to...?
Boeing is to fly by wire as Airbus is to fly by computer, would probably be closer to the mark.
Both are fly by wire, but Boeing is closer to direct input - I move the yoke halfway to the limit, the …
4
votes
Is there similar result between simulation and reality?
Yes, usually
Simulators are pretty accurate, at least for the specific things they're programmed to measure and account for.
For example we have a pretty good idea how airflow works, so airfoil/wind …
7
votes
What does Elon Musk mean by "electric jet"?
Jet noun
a rapid stream of liquid or gas forced out of a small opening
A Jet Engine is an Engine which uses a Jet for propulsion. Typically, a "rapid stream of gas", in which the gas is air. Reall …
4
votes
Why do passenger jets accept input that will cause the aircraft to perform dangerous maneuve...
A couple of reasons, but essentially it comes down to "Because sometimes it may be the lesser of two evils"
Instruments go wrong. Pitot tubes break, gyroscopes go wonky etc... Sometimes, the pilot r …