Thanks for posting that Terry. Iremembered a thread of that nature but I wasn't sure what to look for.

John, that RX crankcase looks sweet! I didn't know OS made a RE Heli engine. I'll have to look up the vintage.

I'm actually wondering how well that crankcase might convert a 61 RF and/or RFHanno... If it worked, it would make a great backup for a Hanno.

What struck me about the liners was the thinner head shim on F. Did Nelson stroke out that VF? If memory serves me, the V series were short stroke engines compared to the FSR/RSR and then the SF/RF series. My 25 VFcertainly is a short stroke but then it is a DFengine (28K rpm anyone... )

David.