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081 POF Fragen

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Flashcards	127
Language	Deutsch
Category	Technology
Level	Other
Created / Updated	05.06.2025 / 18.06.2025
Weblink	https://card2brain.ch/box/20250605_081_pof_fragen
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In order to maintain straight and level flight at a constant airspeed, whilst the flaps are being retracted, the angle of attack will …

increase

remain constant

decrease

increase or decrease depending on type of flap

Given an aeroplane in steady, straight and level flight at low speed. Considering the effects of centre of gravity location and thrust, the highest value of wing lift occurs at:

Aft CG and take-off thrust

Aft CG and idle thrust

Forward CG and idle thrust

Forward CG and take-off thrust

The lift and drag forces, acting on a wing cross section:

Vary linearly with the angle of attack

Are proportional to each other, independent of angle of attack

Are normal to each other at just one angle of attack

Depend on the pressure distribution about the wing cross section

In flight you lower the trailing edge flaps fully down, the …

stalling angle increases and the L/D ratio reduces

stalling angle reduces and the LM ratio increases

wing CP moves forward and the L/D ratio increases

wing CP moves aft and the L/D ratio decreases

Which ratio is defined as the "aspect ratio" of a wing?

Square of the span and the gross wing area

Square of the span and the mean chord

Square of the span and the net wing area

Ratio between wing span and gross wing area

The span-wise flow on an unswept wing is from:

The lower surface via the trailing edge to the upper wing surface

The upper surface via the trailing edge to the lower wing surface

The lower to the upper surface via the wing tip

The upper surface via the leading edge to the lower wing surface

Consider a glide with all engines off. Initial conditions are zero wind and the attitude of the aeroplane gives maximum range. A headwind arises and initially the aeroplane attitude is not changed. After some time has passed the glide range …

… increases when the CL is reduced

… remains maximum when the CL remains the same

… remains the same when the CL is reduced

… decreases when the CL is reduced