I have this theory that I haven't put a lot of thought into because it's mind-boggling. It comes down to all that P-Factor/prop wash stuff.

I'm thinking that due to the unequal effects that the prop blast sends over the wing and flying surfaces that the aircraft should not be exactly symmetrical. In what way I don't know, but for example, maybe the wing needs to be canted somewhat. In other words, the left wing tip may need to be a small degree behind the right wing tip.

I'm curious if anyone knows of any studies conducted on this and if there's any validity to my theory.