Tail_BoomStrike Veteran Location: Virginia Beach
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| max amps: 49.09 max watts: 898 low voltage: 17.92v
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LcyRace
There's seems a bad indication read by your data logger. The battery voltage is dropping 2.9v/cell (17.92 divide by 6, 2.9866). Is this average voltage? That's a sign that the current discharge is greater than the battery is rated for. Also the amps, if your batteries rated 20C 2200mah, that's 44A continuous. Is this also average? Watts is nothing but voltage multiplied by current.
There suppose to be about 3.3v continuous voltage under load. I have no idea what the continuous discharge rate of your battery packs is, but sometimes lowering the throtle curve actually increases current draw, it's better to get lower numbered pinion.
If what you said is right that you actually have 1900rpm at full pitch full throttle, if that is within the maximum headspeed limitation of this heli, keep the full throtle at 100%. So you said HS increases at full throtle, I will assume your midstick throtle percentage is lower than your full throtle. Rather increase the midstick throtle % so the HS midstick will be closer to HS at full throtle. Get the amp reading again see if it drops. If not, lower the full throtle and midstick throtle %. Get the amp reading again.
If the amp reading get higher, it means the motor is bogging that throtle curve is not set up to max efficiency of the motor. Then your only choice is to set the throtle curve back to where it was with the 100% at full stick and whatever % it was at midstick that the rpm is close to rpm at full throtle and get a higher discharge rated batteries. Higher discharge batteries can actualy increase rpm, the reason being that it could hold the voltage better at higher current draw...... |