well this could be a great excuse for you to buy a bigger helicopter, you could fly a .30 in the back yard buy a pump for it and instead of exhaust just spray with it...I can just hear it now..."Honey, I need a bigger heli to get rid of the mosquitos" see now I would try that, probably why I'm single.....Rog

ps the gas thing was on an .049 engine and it did work, and the tank was only like 5cc, I have about 20 of these engines and am not concerned about ruining one of them..

pps if you have an extra glow plug go ahead and try the citronella thing and let us know..