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Bi-plane Lift vs drag penalties

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Thunderchook

Well-Known Member
Joined
Jul 27, 2016
Messages
246
Location
Queensland, Australia
Okay, given that:
1) A biplane has two wings and so gets the same/similar lift from two wings as you would one.
2) The trade-off is that the struts and bracing wires induce a drag penalties

My question is;
1) Are there any other penalties to a biplane configuration as opposed to a monoplane?
2) Is there a lift/drag curve that shows the optimum wingspan/surface area/etc to drag parameters?

Theoretically, can you build a biplane with both wings cantilevered or, even one wing strutted, but with no more drag penalty than your standard strutted/cantilevered monoplane, but with a shorter wingspan?

Thanks,

Thunderchook.
 
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