Biplane lift calculations?

[XiaoLan]

Hi,

In Biplane - Wikipedia, the free encyclopedia I read:

In a biplane aircraft, two wings are placed one above the other. Both provide a portion of the lift, although they are not able to produce twice as much lift as a single wing of similar size and shape because the upper and the lower are working on nearly the same portion of the atmosphere. For example, in a wing of aspect ratio 6, and a wing separation distance of one chord length, the biplane configuration can produce about 20 percent more lift than a single wing of the same planform.

As you might remember, I am thinking about how to design a low speed airplane (ground effect vehicle).

Now I'm playing with the idea of using two wings above each other.

Do you know of any equations I can use to try to calculate the lift (and drag) of the two wings?

Or maybe there is a table of the effect the two wings have on each other dependent, for example, on the distance (chord lengths) the wings are separated from each other and the angle of attack (i.e downwash?) of the wings?

 

[orion]

 

[Kristoffon]

 

[XiaoLan]

 

[PTAirco]

 

[Vigilant1]

 

[XiaoLan]