Britbrat- I'll reiterate...he sounds like he doesn't know much about props from the rash comments that he made. Maybe reading them again would help.

I'll agree with the single engine problem but I'm not sure about ruling out 3 bladed props for that possibility alone. You don't think someone would want to do rolls, loops, and maybe try a hammerhead stall with the Cessna 310 model? Those would be pattern type things. I would try it.