HunkaJunk

I'm updating an old model that has an original YS F-120 on it. The engine appears to have very low use on it.

I don't remember the Prop/RPM recommendations for these engines, but I'm running an APC 17X8 propeller at 8050 RPM at full throttle (Static), This doesn't sound out of line to me considering I'm at 6000 feet elevation, and it runs way too good for there to be anything wrong with it. It was suggested to me that it's over propped, but I'm of the opinion that this is just about right considering it's a 120 size Ultimate.

What say you?

speedracerntrixie

My Feedback: (29)

I see nothing wrong with those numbers, granted it would turn up a bit higher with a slightly smaller prop and if it were a different brand of engine I would agree too much prop. If it's running well, not getting too hot then it ain't broke.