I haven't had time to run it much more, but it runs excellent. I'm getting 6700 with an APC wide blade 20 x 10, but I think I will prop it down some to let it rev up a bit more. The 23.6cc singles seem happier spinning up over 7500. Keith said a lot of people liked a 20 x 8 on their twins. It will idle reliably at 1600 rpms. I'm running Gas/Glow, and no problems.

One hint though.... At one point it mysteriously didn't want to start. Long story short I found that my field box battery got a little low, and it wouldn't light both glow plugs. It would light one just fine, but not both. So if you are going to run your twin on Gas/Glow, make sure to check with the glow plugs out that your equipment will make them both glow nice and orange. Other than that, starts are usually one or to flips. I haven't used a starter on it yet.

Also, it will end up that the carb regulator cover and it's hole will be facing forward. This can cause tuning problems due to the ram air from the prop, and later from the slipstream. Solder a small 90 degree brass tube into the regulator cover pointed into the carb opening to avoid this potential problem. If your engine is going to be cowled, run a hose from this tube into the fuselage to sense static air; not pressurized cowling air.

Good luck,
AV8TOR