Translations:Help:FAQSpektrum:Governor/2/en

What is this and what does it?

Using the governor function you can simply preset your head speed with the transmitter, i.e. when you like to fly your heli with 2500rpm, you set your throttle curve in idle 1 to straight 62.5% in the TX. Then you just place your heli on the flight field, switch to Idle1 and it'll autonomously will spool up the rotor rpm to 2500rpm. Then you can take off and fly and you will get 2500rpm all over the flight, no matter what load condition the battery is or if your nitro motor will run lean. The governor will try to hold these 2500rpm as good as possible. When rotor head load increases, it'll increase throttle as necessary, when you unload the head and the head speed increases due to aerodynamic force, it'll decrease the throttle automatically. Typically this is a lot better than only controlling the motor with static curves made in the transmitter. And next time, again you will get those 2500rpm when flying the next battery/fuel tank, although this battery might be old and voltage is slightly different or the nitro motor may run more rich or lean.

For electric helicopters the governor function is a good thing if you use an ESC with bad head speed governing capability. Most (cheap) ESCs do not have a very good governor or don't feature any governor function at all. For example with some ESC you may get tail pumping at some specific rpm ranges or very abrupt throttle inputs when the load on the rotor head changes. Here you can get good results with the BEASTX governor as besides observing the motor rpm/head speed this will allow to give direct throttle input to cyclic/collective stick input. So it always will be one step ahead compared to a traditional governor function. Using a high priced ESC on the other hand, these typically have so good governor algorithms that it doesn't make any sense to use an external governor and the ESC has knowledge of what the motor is doing at the moment and what's the momentary current, voltage, etc. So here the BEASTX governor function probably will not give any performance boost.

So if you are not afraid of the additional wiring and setup procedure using the RPM governor of AR7210BX can make your heli and your ESC get a very consistent head speed governing at minimum effort. Of course if you think your ESC is working OK and that the governing is working to your satisfaction there is no need to use the governor feature.

Especially for the nitro helicopters using the governor functionality of the AR7210BX can be very handy as the unit necessary for this is already mounted to your heli. There is no need for an extra device. Just connect a rpm sensor of your choice to the unit and after performing the governor setup procedure you will not have to adjust complicated throttle curves anymore. Just choose the desired head speed you want to fly with and set it up in the transmitter, AR7210BX will do the rest including soft start and autorotation bail out feature.

Is the RPM Governor function also available for AR7200BX / AR7300BX?

For the SPEKTRUM AR7200BX / AR7300BX there is a firmware with nitro governor functionality available (Version 4.0.14) which you can get for free by updating with the StudioX software. For electric helis there is no governor available.