I have a used old K&B 61 I wanted to try to fly tomorrow. I have the right size props, but woodenyanowit they're reamed 5/16" for my ST61 and the K&B uses 1/4" .

The closest 1/4"-reamed prop I have is an 11x5. Is this too little? What would I expect if I tried it?

Thanks! flianbrian