"How do you simulate the rapid takeoff and climb, but low top speed with a model ? Mostly, you would use a large diameter propellor with very low pitch."

And THAT'S why geared electrics are a good match to short nosed WWI - a little heavier but able to swing bigger props.
(OK, now I'll duck as Don throws fuel tanks and glowplugs at me!)

Dick, a nice summary of early airfoil development.

Martin