mini300bhp
Heliman
Location: GB
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| Heli engines are designed for more torque. HP is just a formula, showing work. The higher the rpm, the higher the HP for a constant torque. The .21 car engines have impressive HP numbers due to their high rpm, but their powerband is very narrow. Heli's need a wide torque curve to hold headspeed throughout the pitch range. That, and some serious gearing is required at 30,000 rpm that a car engine spins....
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Helis should run at a constant head speed through any stunt or flying shouldn't they? So a narrow powerband dose not matter.
Anyway, I race RC cars and the 1:8 rallycross cars run .21 engines. They only have a single speed gearbox, and they pull hard from standstill all the way through to 60mph+
In championships the cars run non stop for 60min on the thrash, only stopping for fuel.
As for low torque/high RPM, just gear it down.
PS Im not a heli pro, so the above is just a thought. |
