Hi Lynn, with regards to your high-lighted comment about the check balls in the crank – that is one item Bruce Turrentine suggested be removed in an overhaul for aircraft applications, replacing the balls with a carburetor jet to allow oil flow right away and continuously. So, I did install carburetor jets in my e-shaft during rebuild. Any comments? Anybody else out there do the same thing?  Just curious as I’m fighting high oil temps.

Jeff

 

Plus, the rotary is cold blooded. The big bearings stress the oil film to no great extent, and the major source of oil temperature is rotor cooling. At low speeds and idle, the check balls in the crank don't even open to allow cooling oil to spray into the engine. Those balls operate as a function of RPM not temperature. 

 

On the other hand, you will get a water temperature increase within one minute of startup. A water based coolant has very low viscosity and flow to a distant heat exchanger will be immediate. Like the rear heater in my school bus.

 

Lynn E. Hanover