This has been my year + long project reworking the Moki 210 engine into a high RPM nitro breathing monster for the Hangar 9 80" Sundowner. I own a firearms manufacturing business with a full CNC machine shop. All work has been done here with help from my "crew chief" David. He's the airframe guy and I'm the engine man. First flights resulted in some issues with the wings. Had some "reverse washout" on the starboard side. Took lots of trim to make it behave. I've rebuilt the wings and glassed them. Just have to fit the surfaces and then its off to the paint booth for color. First time out I had a 650cc Tettra Tank. Gave me about 8 minutes of flight time with 15% Powermaster fuel. Spiking my home brew to 50% cut it back to about 6 minutes. Way, way too much for a speed/race/test plane. I've cut it back now to a 16oz tank. Gives me about 2 minutes in the air on 50%. Just enough for 6 laps and a deadstick. (USRA Rules eventhough it's no longer an official class) Maiden almost resulted in a total loss. I had my rates set very conservatively. Even still it snapped and knifed edge spun for at least 100 ft before I got it gathered back up. Now the elevators are set to 4.5* for race rates, 6* for landing. Knife edging the trailing surfaces, buring the hinges, and setting the CG way back makes it a very responsive airplane at speed. It's still a handful on the dead sticks though. Flies like a rock with no power. At speed she's a blast. Turns well, and with the addition of the ...
Keywords: RC, Planes, Sundowner, Nitro, Moki, Tuned, Pipe, Pylon, Racing
