Proof that I know almost nothing about airplane design, should any be needed:
I was looking at photos of two of my favorite twin-engined planes, the de Havilland HD-88 Comet, and the Lockheed P-38 Lightning when I noticed something interesting. Their wings are very nearly the same shape but the Comet (or possibly the Lightning) has them on backwards. Here are the two planes:
If I lay one atop the other, you can see that the wings are similar, but that’s about it. The angles at the leading and trailing edges don’t match up very well.
However, if I flip one of the planes, nose-for-tail, the wings match up very closely indeed.
Why should that be? I have no idea.