I recently received a OS FP 25 NIB .Can any one tell me about this engine ? As I have no experience with it.
                   Bob LINDSAY

I have used this engine with great success on both the ARF Flite Streak and a stock Ringmaster. Run it just like Bill said, wet 2 stroke- so you can see a nice smoke trail while flying. It is smooth and quiet, starts easy and will pull either of the above listed planes with no problem. You will love it.

      Thanks Guys for the info on the FP. I bench ran the engine this morning, 9/6 prop 10% nitro 25% castor
    easiest engine ever to start and run looks like a keeper. Just need to build something to hang it on.
                     Thanks again Bob Lindsay

      Thanks Guys for the info on the FP. I bench ran the engine this morning, 9/6 prop 10% nitro 25% castor
    easiest engine ever to start and run looks like a keeper. Just need to build something to hang it on.
                     Thanks again Bob Lindsay

HI Bob,

*Can* the 9-6 unless we're puttnig streamers on them!
That engine doesn't 4-2, but has a great wet 2 run.  4 pitch prop for flying.

Bill <><

Bill: Since you fly with a 9-4 usually, would you want a 8-4 for break in ?

To be honest, Lee, the FPs need basically no break in.  Well not much as we tend to think of it like a Fox 35! 

The ones I've used, and Steve Fitton used, run the 10-4 APC.

The biggest thing I have seen is that as the engine gets more time, it burns less fuel.  With the ABN later FPs, (not the earliest iron piston ones) all I have done is run a tank on the ground to get familiar with it, and then fly!  Haven't been able to detect any longevity issues with the ABN set ups doing this.   OS sets them up, tolerance wise, so that the R/C crowd can take 'em out of the box and fly them without injury to the engines.

Bench running won't hurt, and I would probably use an 8-4 for it, but I never have found the need as long as it isn't set screaming lean on take off!

Bill <><