flybike,

Please don't take this personally, but I would have to be a little FIRM on you about running this motor. If you don't know what this motor set up is, then you don't have enough flying fast experience to handle this type of power and speed. I'm saying this from my personal experience with this engine and as a Pylon Racer and would like to recommend something else to you. Like a Sport Jett .40-.50 on any Quickie 500 airframe or an ARF call Predator from Lanier. This should give you enough speed 140-150mph (and it idle) which should satify (or scare you) your needs for speed.

If you still wanted to know and run the .40 FAI engine... Then by all means get someone with Pylon Racing experience to help you out.

Here are some of the info. that I can assist you with this engine...

1. No! This engine doesn't have throttle. It has a Ventury Wide Open at full power and only way to stop it is shut-off switch by control linkage

2. This engine must be run with a Tuned Pipe (supplied) with the reading of about 24-25,000 RPM with 7.5x7-7.5 Carbon Fiber prop on the ground (it will unload in the air to about 30,000 RPM). As for the glow plug, use a McCoy #9. It has been the best I've found for this engine (and many others). I've run this engine with 8x7 prop and 15% Nitro with good result. However, RPM reading was less, a little over 22,000 RPM on the ground. But when it unloaded in the air, it's a missle (about 200mph)

3. Engine was set up for FAI fuel with no Nitro, but 5% would work just fine (actually better). If you use with higher Nitro such and 15% then head shim must be added.

Last, but not least... Be very safe with this, not only to yourself, but others when flying this type of fast plane. Also, have someone with Pylon Racing experience to help out. And make sure any plane you build must have Carbon Fiber in the wing. Hope this help.

Happy flying fast and safe!

Sam S.