Hello:

I am building a sport scale version of a caproni ca.42. IT is a triplane bomber with three engines, the middle one being a pusher and the others tractors. THe wing chord of all three wings is 5.5" and the spans are all 72". The scale tail size is about 4" chord and 28" long. On the original the tail had a similar airfoil to the wing. I am using a simple flat bottom airfoil for the wings. Should the tail have a similar foil or should I just make it flat like most sport planes. Also, is it large enough to stabilize the plane?

SHould the wings all have the same incidence? I was thinking of making the middle wing, bottom wing and tail zero incidence and the upper a degree or so of negative. THoughts?

Jeff