RCU Forums - View Single Post - Prop for Evolution Trainer motor

04-23-2009 | 05:55 PM

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hogflyer

Joined: Mar 2005

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From: Wichita, KS

RE: Prop for Evolution Trainer motor

Quote:

ORIGINAL: Montague

Fastest trainer I've seen (that hadn't been totally rebuilt), An Alpha 40 with an APC 10x7 and a 2.75" spinner (I think, a spinner big enough to almost reach the fuse sides, it really helps smooth out the airflow and increase airspeed). Anyway, the Alpha is pretty sporty with that setup.

I have an APC 11x5 on the Evolution TPS engine I have in my LT-40 beater plane. I also took the baffle out of the muffler for some extra power at the cost of some noise. (I got the engine from an ex-student who was going all big stuff. The engine had already been seroiusly abused before I got it. Still runs great)

Our club trainer is the predecessor to the Alpha, an Xtra Easy2. It's powered by the same engine, with an 11 X 7 MAS prop (on a worn engine), and has tracked on radar at 76 mph in level flight. The Alpha 40 flies at a similar speed with the same set-up.

Hogflyer

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