Tekno RC Neu or Orig Neu

[bl-is-future]

yep to get the true MAX rpm you will need to use 4.2v/cell. Any lipo charger will charge the lipos to 4.2v/cell unless you tell it to cut off at less on some chargers.

[VintageMA]

Originally Posted by bl-is-future

yep to get the true MAX rpm you will need to use 4.2v/cell. Any lipo charger will charge the lipos to 4.2v/cell unless you tell it to cut off at less on some chargers.

I wouldn't be concerned with using 4.2 volts/cell in any of your calculations because your cell will never hold that voltage (even fresh off the charger) when you wind that motor up to full speed. Best case you are looking at is 3.7-3.8 for a while and closer to 3.5 (with only the best lipos) when pulling ~20C.

As here is where 2S and 3S setups will have trouble as you'll be pulling big amps and the per cell voltage will be closer to 3.3-3.5v/cell.

I use the nominal 3.7v/cell in all speed calculations for HV. If you are going LV (ie: 2S or 3S) I would recommend using 3.5v.