RE: OS 33GT Gasoline Engine for Pattern
I hope to play with the engine this weekend. From the very limited running I've done the engine seems to respond more linearly to throttle than my SAP 30cc did on pipe. I never could get rid of the jump on pipe at around 3500 rpm with the SAP, no matter what prop I used or the pipe setting (from nominal at 27" to baffle all the way to 31").
The OS is a different breed of cat it appears. I'll know much more after I run it in flight with larger props. Break in will happen with an 18x12 carbon-wood MDK hybrid. The SAP 30cc choked on that prop so it will be enlightening either way.