Quote:
Originally Posted by chilledoutuk
also you have to remember that the 3100mah 3s battery has 34.41 watt/hours of power and the 2s 4200 has only 31.08.
which to me means if you were to gear down so that the top speed was the same with the 3s pack and you were not running the motor at too high an rpm as to the extent of not effecting the efficiency of the motor significantly then i suggest that you would get an increase in runtime with the 3s pack.
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This is what I was wondering. Essentially, the 3100mah x 11.1 volt battery does store a slight bit more energy (123,876 joules) vs the 4200mah x 7.4 volt (111,888 joules).
So, if you took two equally efficient "S" can motors that had the appropriate KV rating to top out at around 35,000 rpm (4730kv = 2S and 3153kv = 3S), and the same pinion then you should have very similar run times between the two systems?
I'm then guessing that if you choose to go for more punch and use an "L" can motor with a larger pinion on the 3S system you will start to see reduced run times?