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EN ATPL Principles of Flight Questions in English
Practise Principles of Flight
Vortex generators on the upper side of the wing surface will:
A stationary bow shock ahead of a blunt nose in the free stream requires supersonic upstream flow. It can first exist at a free-stream Mach number:
For a conventional aeroplane in level flight, assume that forward CG requires greater tail downforce and that take-off thrust provides both an upward force component and a nose-up moment, reducing the required wing lift. At the same mass, which combination requires the greatest wing lift?
For the conventional reversible elevator and trim-tab model, with fixed CG ahead of the stick-free neutral point, as illustrated in the classical stick-force stability curves, which statement is correct?
Following a Mach-trimmer failure, which general action is appropriate?
For a conventional aeroplane with reversible elevator controls and natural aerodynamic stick-force feel, which statements are correct? I. Stick force per g is independent of altitude. II. Stick force per g increases as the CG moves forward.
Dihedral of the wing:
Compare otherwise similar twin-engine aeroplanes with wing-mounted engines, one with jets and the other with counter-rotating propellers. Assume the propeller slipstream adds wing lift behind each operating engine, while the jets have negligible such effect. After loss of one engine, considering the additional rolling moment from asymmetric slipstream lift:
On a transport aeroplane fitted with a conventional high-speed lockout for its low-speed outboard ailerons, inhibition is normally associated with:
On a transport with fully powered, irreversible elevator controls, what is an important advantage of an adjustable horizontal stabiliser for pitch trim?
