GP P-51 ARF, engine
 

Hi I would like to know what engine would work well in this plane.

I have a pretty good idea, But I want your opinon

Im looking for speed, a high proformance mustane
but not too over powered.
Thinking about the new O.S. .50SX ringed
any others?

Thank you

p.s. i strething all my arfs but do not add significant weight to them.

O.S. Engines
 

Hey there,

I'm assembeling that ARF as well, and the engine I'll be using will be the O.S. Max .46FX. I've spoken to a few people at the LHS who fly this kite with the engine, and they assure me that the plane will fly very well with it.

Obviously if you pump it up to the .50 SX, you'll get that much more oomph out of it, but from everything I've heard, the .46 is a good way to go.

By the way, are you building it with retracts? I'm still debating on that issue. One reason being is that I've heard some negatives about the recommended Hobbico retracts, and haven't had much luck finding an alternative.

I also noted that you mentioned strengthened your ARF's. I've heard from a couple of guys that the ply landing gear plate can be weak. So I went to the shop and bought a new chunk of wood and made it to fit. So that should shore up against most problems there.

Later,

GP P-51 ARF, engine
 

I decided to take my chance with the hobbico retracts

I have heard bad things about them. But I fly off of a compacted dirt runway so the retracts should not be a problem. Our other newer field is crused stone with a plastic tarplike material sterched over it and driven into the ground drum tight. That wont be a problem ether.
You want to do renforcements to the landing gear area and use a good hobbico retract servo (cs-63) and fly from low cut grass or smooth runways like mine retracts will be fine

GP P-51 ARF, engine
 

Check out the Irvine .53 Mk3 at http://www.justengines.co.uk
It weights just 1 oz more than the OS .46 and uses the same fittings.
Mine came last week, 7 days after it was ordered (via Visa) and cost $109 delivered to my door.
Jim Devine