Hi Tweekie,
thanks for that info!
with a bit of flexing of my google-fu i fouund a good explanation of the Govenor feature for Heli's.
Basically it is designed for constant head speed on the heli's.
For other people who find this thread.
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(pasted from
http://www.rcgroups.com/forums/showthread.php?t=134039)
OK, I think several things are being misunderstood ... let's see if I can clear things up a bit.
First of all, the percentage of throttle on the STICK doesn't have anything to do with % of throttle at the motor when in governor mode. The stick (or throttle%) from the radio commands the controller to a given RPM -- the controller will determine how much throttle is required to maintain that RPM, and will modulate the throttle accordingly.
For example -- in Governor Mode 1 (low RPM mode) the motor speed range is approximately 12000-36000 on a two pole motor (like a Hacker) or 6000-18000 on a four pole motor (like an Neu) or 4000-12000 RPM on a six pole motor (like a Mega.) So if you set a 50% throttle point on a Hacker motor, the controller will set the throttle automatically to run at 24000 RPM. If you are running a high RPM hacker motor (Like a B20-12L) with no load, the controller might only have to use 10-12% of throttle to maintain that RPM. Under load, it might take 50% throttle to maintain that RPM. If you put a really big load on the motor, the controller will go to 100% throttle to try to maintain the 24000 RPM point.
A good illustration of Governor mode can be made by using a motor with no load. If you run the motor up, and then put a finger against the motor shaft to load it up, you will notice that the motor (for a brief period of time) will slow down, then the controller will increase throttle to compensate, and the RPM will return to the set point. When you then unload the motor, it will (again for a brief period of time) increase in RPM, and then the controller will reduce the throttle to bring the RPM back to the set point.
The idea is that a constant head speed (regardless of collective setting) is desirable. The controller will increase throttle automatically when the collective is increased, and decrease throttle automatically when collective is decreased, in order to hold the head speed constant.
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thanks again for your help.
Chris