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  • How to calculate the thrust of a piston or turboprop engine?
    Well, in a sense it is easy Power = thrust · velocity However, that is power output of the propeller Between power output of the engine and power output of the propeller is the propeller efficiency and somebody else will have to describe that
  • If a twin-engine airplanes propellers both rotate in the same . . .
    If an airplane with two propellers has both propellers with the same rotation direction (say, both the propellers rotate counter-clockwise as seen from nose to the tail), will be the four left-tur
  • Was the miracle on the Hudson saved exclusively by the APU?
    In the film Sully, (staring Tom Hanks) the APU is switched on straight after both engines rollback, why was this step necessary; Airbus said this was the "15th thing" to do on the checklist How o
  • metar - What do the different colors of weather stations indicate on . . .
    In this particular map from SkyVector, what are the meanings of the different colored circles, and for the different amounts of 'fill-in'? It's obvious by hovering over them, that they are weather
  • On a chart, how can I find the frequency for flight following?
    Fligihtwatch: Mooney near Crazy Woman, Flightwatch, go ahead (they probably won't get your numbers, but they will pick out your type and position) N347T: Flightwatch, Mooney 3-4-7-Tango, what's the frequency for flight following near C-Z-I?
  • weight and balance - Can the center of gravity ever fall outside the . . .
    Yes it can be Whether the aircraft can fly with the centre of gravity outside this range is a different matter altogether When flying, the aircraft is balanced around the centre of gravity of the aircraft Aerodynamic forces from the wing and the tail provide the balance, but up to a maximum At some point the aerodynamic lift capacity of the tail is saturated In order to make sure that the
  • Do MD-11 pilots ever use flaps 50? - Aviation Stack Exchange
    The MD-11 has one of the highest approach speeds, which is comparable to the 747-400 (Boeing), while having higher wing loading: 806 vs 756 kg m 2 2 ${}^{2}$ In other words, the MD-11's wing is small, so flaps 50 is not an overkill The standard MD-11 landing flaps are either 35 or 50 depending on the weight, altitude, available stopping distance, etc Aircraft manufacturers don't usually go
  • Why do turbofan engines have low pressure compressors?
    In my understanding turbofan engines usually have 2 stages of compressors: one low pressure compressor followed by a high pressure compressor But it looks like the high pressure compressor
  • What is temporary flight plan in A320 MCDU?
    I have been reading FCOM to undestand how MCDU works, there are severel mentions about "temporary flight plan" Does anyone knows what it is?
  • Why is 3000 psi the most common hydraulic pressure used in commercial . . .
    The linked article directly answers the question "Above 3000 psi, using aluminum as a pressure vessel becomes risky," says Galloway "5000 psi systems almost exclusively rely on steel or titanium To minimize stresses, the sizes of passages can be reduced Computational fluid dynamics is also used to minimize pressure drop in critical areas " 3000 PSI was the best you could get with technology





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