interesting that you mention planes Don, I still recall an early formative experience of mine was drawing planes (Russian Migs to be specific). My dad took me to work once when I was 5or6, he was in the army and worked in a printshop. To keep me busy he gave me some pencil and paper for drawing. I started drawing planes, but they were typical kid drawings, one of my dads co-workers came over and said, here do you want to know how to draw a plane so that it looked more real,
and he drew one. ANd I immediately picked up on the differences, foreshortening, perspective etc. although I didnt know these terms.
of course It was a still a while before I could properly draw,
but the more you do the better you get.
Funny how, one little incident can be so influential.