FrancisPerson

Last weekend I bought a box of old engines at an R/C auction and one of them is a K&B baffle piston .61 R/C engine. I soaked it in glow fuel and now it turns over "OK". What kind of RPM can I expect from this engine? Is a APC 11x7 an OK prop size?

Thanks
Francis

w8ye

My Feedback: (16)

I used to have several of these. You should get around 13500 with that prop. That's what mine would do.

Flyboy Dave

My Feedback: (21)

....you'll get around 12 thousand revs with that prop.

FrancisPerson

Thanks,

This engine is quite light I bet I could overpower a .46 sized plane? Hope the ring is not stuck.

Francis

Sport_Pilot

Mine gets about 12,500 with most 11x7's. The pdp version will get almost 1000 more.

MatheusC20XE

mine standard, 12K rpm too..

excellent engine... very good power for a not schneurle type,..

I used mine in a Piper Clipped for .40 engine without problems of heavy nose..

Flyboy Dave

My Feedback: (21)

....the K&B .61 is the perfect power plant for 40-46 size planes.
I have one in a Ultra Stick 40. An 11-7 1/2 Master Airscrew is great
on the .61's.

FBD.