John,

I've looked at that prop and to get it I think a DA-50 would be a great plus it is a very reliable engine. I just happened to own these particular engines, I did not buy an engine for any specific situation. I did buy a RCV-90SP to run on a 60 size Mustang because I wanted to run a 4-blade prop. And it works great, has for about 5 years. If you do buy the Scale Prop Drives system I'd sure like to hear about your results, it sure looks like a neat system to me. Are you planning to use a multi-blade prop?

David