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Old 09-19-2019, 05:13 PM
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quorneng
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Location: Cheshire, UK
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sportflyer
The reason for a throttle response curve is more of a safety feature than a necessity. An electric motor will produce a torque then is more or less proportional to the throttle position regardless of the speed the motor is actually rotating.
In a helicopter you have a huge diameter relatively heavy rotor and the motor is geared to drive it. Apply full throttle and the motor will apply full torque instantly. The rotor hub will not be able to handle the sudden torque likely damaging the rotor blades or even twisting them off. An expensive and potentially dangerous situation. A conventional propeller is by comparison both smaller diameter and much more heavily built so can withstand the instant full power torque, although 'snap' opening full throttle from static is not to be recommended.
Of course you can overcome the problem on a helicopter by opening the throttle suitably slowly from static but you are then relying on the pilot to remember to do so.
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