I was reading about first-time setup and tuning for a quad-copter. In the tuning section (Setting the Aircraft Up for Tuning — Copter documentation), instructions are given for setting battery monitor parameters. The battery monitor helps ensure control stability in the case of voltage sag during throttle increase. I was curious if the battery monitor would also be necessary for a traditional helicopter.
I did not see voltage sag detection mentioned in the setup and tuning instructions for a traditional helicopter. I’m sure this is because a traditional helicopter is maneuvered by pitch control while throttle control is simply regulated to maintain head speed. There is potential for voltage sag during maneuvering, however, a traditional helicopter rotor is much slower to accelerate or decelerate. So stabilization in a hover is not a concern, where small quick control adjustments are made, but what may be effected is the stability of the helicopter during prolonged stress during climbs or banking turns. This is where I might want to have a battery monitor. That is my assumption.
I am building my drone around the Align E1 900 helicopter. I hope that a battery monitor is not necessary for stability, since this larger helicopter will require around 200 amps at 12S. I prefer to bypass any power module, and instead use a dedicated battery for the autopilot. There is one option for a power module made by Holybro (the PM08D).
Is there any control stability concern if I do not use a battery monitor for the traditional helicopter configuration?