Higher voltage and efficiency

[lincpimp]

My experince with HV vs LV was mainly with the feigao 2 pole xl motors.

An 8xl motor on 4s and a 14xl on 8s spin about the same rpm, and thus would run the same gearing in the same rc to get the same overall speed. The 14xl ran cooler (it actually did not overheat in a 30min bash) vs the 8xl (20 mins was about all it could handle).

Also, going from 4s to 6s made a big difference too. a 1515 sized motor on 4s always seemed to have issues (like a 1515 1y) with a heavy truck, but dropping to a lower kv motor and going to 6s worked fine with the 1515 size.

Any reason why I saw this?