Thank you Piero, yes Carl Dodge uses a Profi 2005 with his own bits inside now. I agree his engines are too much work, I will make mine a lot less pretty! I really admire the Lerner engine though, really nice! I also like the work of the Late Wayne Trivan.
Half A Engine
Cannot go to the WC, I still have to work for a living. This is a problem, the Earth is too big!
I see you have talked about propellers letting go, we had that happen in a test bench. Flew straight past my right ear as I was adjusting the fuel needle. Your engine ( OPS Redhead 60 on pipe ) turned into a wild animal as one blade stayed attached, went relly well in the model after that. Perhaps I am giving away performance secrets.