Steve Jacobs wrote: > The tendency (ability) to wind-mill at cruising speeds is influenced by > how much resistance the engine presents to being turned over (CR), as > well as the force that is trying to turn it - and that is very much a > function of propeller diameter and blade area. Smaller props have less > leverage (and inertia).
Good point, and I'm sure you're exactly right that prop diameter also has a lot to do with it. I guess I was assuming all things remained the same. You can make a VW or Corvair turn a prop slowly too. William Wynne's Pietpol ran a Corvair at about 3000 rpm WOT and he claims an output of about 90 hp, and turned a 68" Warp Drive prop on it. See http://www.flycorvair.com/corvair.html#Engine%20Specs for more details. Mark Langford, Huntsville, AL N56ML at hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford
