The Throttle Curve On the Governor Mode

Posted on 09 Jan 2013 by RC-Fever.com  

 

The Throttle Curve On the Governor Mode

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If you use a governor you don't have to use the old throttle curve setting, you must replace them by throttle curves described in this specific section.

The pitch curves are no different than without a governor, only the throttle curves are different. A governor keeps the head speed at a certain speed and it is completely independent of the throttle stick position. A governor controls throttle servo in order to reach the preset rotor speed whatever the pitch is.

Normally the governor is controlled by what percentages you place in your throttle curve. The percentage value will correspond to a specific head speed. As an example 80% throttle may equate to 2000 rpm. The governor will hold the set RPM. Even if you give the helicopter lots of pitch the governor will compensate by automatically increasing throttle to hold its set RPM. In other words with a governor the "throttle" curve doesn't control throttle really, but the rotor speed instead.

For Normal flight mode, the throttle curve ramps up quite early on (starts from idle and progressively speeds up) and then keep constant to the the expected rotor speed ( here 80% ). The throttle curve looks like that:

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For Idle-up 1 and Idle-up 2 flight modes, the throttle curve is equal to the percentage corresponding to the expected main rotor speed. The governor will reach the the set rotor speed whatever the pitch is. The curve is a constant value whatever the stick position:

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