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Aerospire Support Center: MultiGov and eMultiGov.

 

Thank you for using MultiGov or eMultiGov, which have been discontinued.
Our newest governor is MultiGov Pro, a world-class 3D helicopter governor with automatic mixture control.

Please note: this Support page is no longer being updated.

MultiGov FAQs
T-Rex 600 Nitro Mounting Instructions
Radio Setup for RPM Select Input

 MultiGov Support Documents
MultiGov Manual (PDF)
eMultiGov Manual (PDF)
 
 
 MultiGov FAQs
What is the maximum voltage I can run MultiGov at?
How can I reduce the amount of overspeeding during unloading of the rotor?
I am experiencing some periodic motor surging/oscillations in hover. Alternatively, the motor does not seem to run smoothly during hard flight. What should I do?
How do I get more recovery power for fast pitch pumping 3D maneuvers?
What should I do if I hear a motor "hiccup" after I unload the rotor?
What can I do if the rotor speed spools back too slowly after I do a throttle hold and then abort the throttle hold?
How can I mount the RPM sensor on a Synergy helicopter?
 
What is the maximum voltage I can run MultiGov at?
As long as you have the "RPM Select" input connected to your receiver, you can run MultiGov up to 11 volts.  If you are using only one speed and have the jumper installed, you can go up to 7 volts. Note that you still need to make sure that your throttle servo can handle higher voltages.  Depending on your servo, you may need to regulate/drop-down the power going to the servo.
 
How can I  reduce the amount of overspeeding during unloading of the rotor?
You can decrease the "LowThrotPcnt" basic configuration option so that the lowest throttle position MultiGov will go is lower.  The default setting is 30% above idle.  You can try to lower it to the 20-25% range.  The downside to having this setting too low is that you may not have consistent smoke/motor noise.  Depending on your helicopter, you may also run the risk of disengaging the clutch during flight if set too low which is not good.
Another option is to increase the “BaseGain” value to see if that helps.  Try increasing “BaseGain” by 10-15 point increments.
 
I am experiencing some periodic motor surging/oscillations in hover. Alternatively, the motor does not seem to run smoothly during hard flight.  What should I do?
Possible solutions are:
1) Double check that the sensor is securely mounted and that the magnet moves directly over it.
2) This could happen if your motor needles are too rich.  Try leaning out the needle settings.
3) If you are running in full governor mode, try turning OFF the "Digit. Servo" mode if you have it ON.
4) If that doesn't help, go the Advanced Configuration menu and try decreasing the "GainAgres" value by 1.
 
How do I get more recovery power for fast pitch pumping 3D maneuvers?
You can increase the "LowThrotPcnt" basic configuration option so that the lowest throttle position MultiGov will go when controlling overspeeding is higher.  This can improve RPM recovery for fast pitch changes.  Adjust to your liking.  A good value might be in the 35-45% range.  You may experience more overspeeding the higher you make this value. From our testing and feedback, this is more beneficial for .91 sized motors.  If you are running a OS .50 Hyper motor, going beyond the default setting is not usually needed since the OS .50 Hyper typically runs a high RPM at low throttle.
 
What should I do if I hear a motor "hiccup" after I unload the rotor?
Try and lean out the low/mid throttle needles to see if it gets rid of the problem. Optionally, your motor may have a rough spot around the low throttle range which causes the hiccup.  You can avoid the rough spot by increasing "LowThrotPcnt".
 
What can I do if the rotor speed spools back too slowly after I do a throttle hold and then abort the throttle hold?
When you do a throttle hold and the rotor speed drops very low, the slow startup is re-engaged when you abort the throttle hold.  To have the rotor speed startup faster, set the "Startup Speed" value higher in the "Advanced Configuration" options.  Increase to your liking.
 
How can I mount the RPM sensor on a Synergy helicopter?
Simply use a dremel to cut down one of carbon fiber mounting brackets and screw it onto the existing governor mount that comes with the Synergy kit like this:

.

 
 Radio Setup for RPM Select Input

There are three different programmable speeds in MultiGov/eMultiGov.  The best way to be able to use all three speeds during flight is linking the "RPM Select" input to your radio's three position flight mode switch.  In all radio setups, the goal is to have the receiver output three stick positions (low, middle, and high) which MultiGov/eMultiGov treats as SPEED1, SPEED2, and SPEED3.  The following are ways to do this using different radios.

NOTE: Using three speeds with the "RPM Select" input is optional.  If you only need one speed (i.e. only 3D), just install the RPM Select jumper as the instructions show and set SPEED1 to your liking.  This is best for users who don't have an extra channel on their receiver or don't need another speed.

Spektrum DX7
  1. Plug the "RPM Select" input to either the "GEAR" channel or "AUX2" channel of your receiver.
  2. On your DX7 radio, go to the model options and assign GEAR or AUX2 (depending on which channel you plugged RPM Select into) to "F. MOD". The model options is accessed when you power on the DX7 while holding the scroll down+select buttons. See the DX7 manual if you need help for "F. MOD" assigning.
  3. The MultiGov SPEED#'s should now change on the LCD as you flip your radio's flight mode switch.  If the SPEED#s are reversed, just reverse the channel that "RPM Select" is plugged into with your radio.
Futaba 7CHP

 

  1. Plug the "RPM Select" input to channel 7 of your receiver.
  2. Go to the "PARAMETERS" menu on your 7CHP and assign channel 7 to switch "E".
  3. The MultiGov SPEED#'s should now change on the LCD as you flip your radio's flight mode switch.  If the SPEED#s are reversed, just reverse the channel that "RPM Select" is plugged into with your radio.
Futaba 9CHP

 

  1. Plug the "RPM Select" input to channel 7 of your receiver.
  2. Go to the "GOVERNOR" menu of your 9CHP and assign "SW" to "E". The "RATE"s on the "GOVERNOR" menu should be 0%, 50%, and 100%.
  3. Go to the second page of the "GOVERNOR" menu and activate the MIX.
  4. The MultiGov SPEED#'s should now change on the LCD as you flip your radio's flight mode switch.  If the SPEED#s are reversed, just reverse the channel that "RPM Select" is plugged into with your radio.
JR 9303

 

  1. Plug the "RPM Select" input to the GEAR of your receiver.
  2. Enable the governor menu on your 9303 and set the three values to 100, 0, -100.  Refer to your 9303 manual on how to activate the governor menu on the radio.
  3. The MultiGov SPEED#'s should now change on the LCD as you flip your radio's flight mode switch.  If the SPEED#s are reversed, just reverse the channel that "RPM Select" is plugged into with your radio.
JR 10X

 

  1. Plug the "RPM Select" input to the GEAR of your receiver.
  2. Go to function 17 and "INH" the "GEAR SW".
  3. Set programmable mix 6 to be "GEAR->GEAR" and go to the third page to tie "#FMOD->GEAR".
  4. Go back to programmable mix 6 and store the two endpoints in the first page graph to -100 at 33% and 100% at 67%.
  5. The MultiGov SPEED#'s should now change on the LCD as you flip your radio's flight mode switch.  If the SPEED#s are reversed, just reverse the channel that "RPM Select" is plugged into with your radio.


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