Originally Posted by franke21m
As for the composite vs. balsa, I think they should put a composite in a wind tunnel before the release them. All the composite planes i have seen have a round bottom. The round bottom has no lift. Causes screwy air. If they were to put them in a wind tunnel they would be forced to go back to the drawing board. The only reason I speak this way is this is a 3dhs thread. Composite dont 3d well at all. Ill stick with the balsa.
I wonder how strong would a composite airframe be if it wasn't rounded? I'm guessing that's why they are round, otherwise they'd likely fold up during a hard snap. Also, I would think if they were a squared shape, it would be hard to keep the flat sides from "drumming" at speed, and eventually breaking apart.