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Old Nov 13, 2012, 11:21 AM
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USA, TX, Grapevine
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I think some people put the 9cc gas engine in some 30 size heli's already. I remember reading about it somewhere before. One company was experimenting with one in a .50 size heli. But they may have had to change the gear ratio and or rotor blade sizes too.

Years ago there was a short spurt of excitement in using model diesel engines in helicopters. But one needed to change the gear ratio to adjust for the higher torque of the diesel engines. Plus they could run different size rotor blades too. Getting model diesel fuel easily probably caused the diesel engines to fizzle out at heli engines in this case.

Oh yeah, one guy in Russia used four of the 9cc gas engines in a multi-rotor plane or heli. He had a video posted of his tests, but I don't remember if he had any flying videos posted yet or not. I think he mentioned it way back in this thread someplace.
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Last edited by earlwb; Nov 13, 2012 at 11:23 AM. Reason: forgot to add a final comment
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