Por que o sistema bancário seria um problema para os passageiros da aeronave Flying-V?

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Por que o sistema bancário seria um problema para os passageiros da aeronave Flying-V?

#1 resposta do (4 votos)
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In Este artigo, the author raises doubts about the viability of this aircraft:

Sadly for the Flying-V, it will probably fail like the blended wing body designs we've seen down the years. It's for the same reason, too: airplanes bank as they turn. That's not much of a problem in a conventional airliner design, where passengers are never that far from the plane's central axis. But as you move further out from that central axis the effect becomes a lot more pronounced.

_{credit: Edwin Wallet, Studio OSO}

I don't really understand how banking is a problem. The angle for the passenger remains the same, the only difference being an increased of vertical acceleration when the airplane is initiating / retracting the bank.

An apparent simple solution would be to... bank more slowly...

Is there something I'm missing? Would the vertical acceleration really be a concern for passengers?

projeto de aeronave conforto

por Antzi 05.06.2019 / 02:37

2 respostas

Tags projeto de aeronave conforto

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score 4 · Answer 1

There are two possible sources of discomfort for passengers sitting farther away from the aircraft's longitudinal axis during a roll manoeuvre:

At the start and end of the roll manoeuvre, the angular acceleration will be felt as a stronger vertical acceleration, as you pointed out (vertical as in perpendicular to the cabin's floor).
Between the start and the end, the aircraft will be rolling at constant angular speed (or roll rate), so the angular acceleration will be zero, but the passengers will still be moving along a circular trajectory (around the aircraft's longitudinal axis) and therefore will also be subject to a centrifugal force (parallel to the cabin's floor) that grows proportionally with the distance from the longitudinal axis.

The roll manoeuvre itself may only last a few seconds, but if the above effects are strong enough, it could be enough to make some passengers feel properly queasy, especially if it's repeated a few times as during departure and arrival procedures.

As you suggest, rolling more gently and more slowly would limit these effects. However, instrument flight procedures always involve standard rate turns, with turn radii expected to remain within certain limits, depending on the aircraft's speed. Rolling more slowly would increase the aircraft's overall turn radius and could make it harder or impossible to comply with currently published procedures.

score 0 · Answer 2

I have a doubt if the question addresses and actual problem. Banking in airplanes is supposed to match centrifugal forces, same as roads and rail tracks are not horizontal in turns. A lateral pull of gravity, or of the force towards airplane floor, when turning around the main fuselage axis won't be noticeable for passengers, as otherwise, structural loads on airplane would be too high, an airplane is not a rollercoaster, an airliner is not an aerobatics machine, not a combat airplane in a dogfight, but perhaps the inertia, momentum forces in having the lot of weight passengers and airplane structure turning will impose an slow banking rate, a regular airliner has most weight close to center, a 'V' shaped machine, or other lifting bodies, do have an important width in weight distribution; ordinary airplanes have just the light wings quite apart from center line. Is this a reasonable answer to issue? Thanks. Salut +