Dar, I definitely agree with you, this prop is too small. That is why I posted my question here, to see what size prop I needed to get the rpm's down to the proper level. I have ordered an NX 24X12 and will try it. If it turns 6000 static, will unload in the air and turn 6800? I guess that should have been my original question, how many rpm's does a prop gain unloaded in the air vs. static.