It's a fact that people (men) were much smaller 90 years ago than today and even in WWII. I went to the Smithsonian Museum a few years ago and was really surprised when looking at the actual uniforms and civilian clothing of 'average' people from 100 years ago how tiny they seemed compared to today.

But there are always exceptions to every rule and even 90 years ago when the average was small compared to today there must have been at least a few 6 footer's flying those old machines. That would make your pilot scale unless he is supposed to be replicating an historical figure who was under 6' tall.