A123 2S2P - change to 23T pinion gear?

[suicideneil]

Thats a pretty tight track for something as big as a flux, no wonder you dont need much speed- gearing down would be a very good idea to spare the batts some strain (lower the voltage, lower you gear if keeping the same kv motor).

Not sure on the battery compartment measurements, but I would have though you could fit 5 A123 cells in each side, if they were arranged side by side (in a row within the compartment). I know A123s are pretty cheap, but lipos are also very cheap these days, and alot lighter than the A123s, might work out better for you.

Anyway, I wouldnt try to gear the 4s2p A123 setup the same as the 4s lipo setup, you will definately need to go down in gearing to prevent over drawing the A123s which will have a knock-on effect with the esc (ripple current and all that fun stuff that the MMM doesnt like).

Originally Posted by suicideneil

Thats a pretty tight track for something as big as a flux, no wonder you dont need much speed- gearing down would be a very good idea to spare the batts some strain (lower the voltage, lower you gear if keeping the same kv motor).

Not sure on the battery compartment measurements, but I would have though you could fit 5 A123 cells in each side, if they were arranged side by side (in a row within the compartment). I know A123s are pretty cheap, but lipos are also very cheap these days, and alot lighter than the A123s, might work out better for you.

Anyway, I wouldnt try to gear the 4s2p A123 setup the same as the 4s lipo setup, you will definately need to go down in gearing to prevent over drawing the A123s which will have a knock-on effect with the esc (ripple current and all that fun stuff that the MMM doesnt like).

Hi,

so if I go with 18T pinion gear it would be more or less ok?
Yes, I am looking at hard case LiPo, just need to figure out which I need. At the moment in tournament we do three 5min qualification runs and one 20min final run. So I have to calculate what sizes do I need for that... Could you suggest some numbers, please? mAh, and C...