BTW, if you're looking for something fun to read...............

You will get a kick out of this one, if you can find it.

It's one of the first "scientific" books on model airplanes that was available and affordable. The author was born in 1885 if that gives you a clue. It was actually published in 1955, just a year before he died. I think I paid $1.75 for it new. I would have had to pay full price. And tax would have been 2% at that time.

You will get a look at modeling when it was young. It's basically about free flight and control line, which were pretty much where modeling was at back then. But a bunch of it is actually useful. And it's like almost all books on aero, some of it's not directly useful, but some of it is. Interestingly enough, there is a fair amount in it about flat plate airfoils.