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1

You ask: Is it bad form to call "ready to depart" when you know you won't be cleared yet? Speaking as a controller, my answer is emphatically: Yes, this is bad form. Do not do it. When you call ready for departure (and please do say "departure" rather than "takeoff" in all radio calls except reading back "cleared for ...

0

Excluding safety factor of a little excess airspeed before rotation and excess thrust/angle of climb considerations: Weight = Lift = 1/2×rho×v$^2$×Area×Clift and Ws = Weight/Area Multiplying W by g would convert your weight force into Newtons, otherwise your two formulas are interchangeable. For these calculations, special attention to the AoA part of the ...

2

My understanding is that the lift fan (two sets of contra-rotating blades) is driven from the main engine via a permanently rotating drive shaft, but that the drive from the shaft to the lift fan is connected/disconnected from the lift fan via carbon clutch plates. In conventional flight it makes little sense to waste engine power driving the lift fan when ...

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