Aeronautical Engineering/Aerodynamic properties

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Question
Glider
Glider  
Does a butterfly/"V" tail on an aircraft provide any form of lift (as pointed out in the attached photo)? There is no airfoil shape to them.

Answer
Hi Jon,

Even a flat plate can be used to produce lift (not very efficiently)...  so certainly the V-tail will produce some lift (if put at angle of attack)...  it will also create a fair bit of drag...

Think of a big sheet of plywood or poster board in the wind, it will definitely deflect the air in such a way as to create a lift force (it's just not that efficient at doing it, therefore it will also create a disproportionate amount of drag)

Thanx,
mj

Aeronautical Engineering

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Mark Janus

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