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Author Topic: How can planes do tricks?  (Read 1922 times)

Offline thedoc

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How can planes do tricks?
« on: 10/09/2013 12:20:46 »
When an airplane does a knife-edge pass (wings vertical), where is the vertical component of lift coming from to keep it in the air?

Thanks!
Cameron



Asked by Cameron Thompson


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« Last Edit: 10/09/2013 12:20:46 by _system »


 

Online evan_au

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Re: What produces lift during a knife-edge pass?
« Reply #1 on: 17/07/2013 10:45:01 »
During the knife-edge pass, the propeller/jets are angled slightly downwards, and this directs a flow of air downwards.
The body of the aeroplane is angled, and this directs a flow of air downwards.
This downwards force on the air provides an upward force on the aeroplane to keep it in the air.
 

Offline lightarrow

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Re: What produces lift during a knife-edge pass?
« Reply #2 on: 17/07/2013 12:55:52 »
During the knife-edge pass, the propeller/jets are angled slightly downwards, and this directs a flow of air downwards.
The body of the aeroplane is angled, and this directs a flow of air downwards.
This downwards force on the air provides an upward force on the aeroplane to keep it in the air.
I am not an expert at all, is it possible that the rudder also is used for this purpose?
 

Offline alancalverd

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Re: What produces lift during a knife-edge pass?
« Reply #3 on: 17/07/2013 13:34:24 »
All of the above. A true 90 degree bank produces no upward lift from the wings, but every nonvertical surface is acting to produce lift. To sustain a knifedge at constant height you need to angle the thrustline upwards or tolerate a significant loss of speed throughout the manoeuver.
 

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Re: What produces lift during a knife-edge pass?
« Reply #3 on: 17/07/2013 13:34:24 »

 

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