Originally Posted by
Got RPM
It sounds like the ESC is shutting down due to low voltage, with weak packs the inout voltage could be low enough to trigger the LVC, even if fully charged.
My last club ran a similar motor (36mm, 3500 Kv) in small (25”-28”) hydros with Octura m440 props on 2S and got speeds in the mid to high 40s. Your cat won’t go that fast on 2S but should still be plenty.
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Thanks Got RPM,
After read your information and looks at some Youtube video, I can see that kit is useless! Why in hell are they sell kit like these for boat in 24 - 31"?
There are following a 70A ESC with the motor and the best rpm IS 20 - 35000 rpm and after some calculating I can not get the right setup!
2S battery will give about 28000 rpm but use 166A
3S battery will give about 42250 rpm and use 121A
4S battery will give about 56108 rpm and use 84A
If I have understand it correct you take your motor Watts and divided it with the battery volts and so you got you amps?
And the RPM you got with divide the KV with the Volts?
So when the ESC only is on 70A it will never could be use for these setup or??
You can by these kit anywhere on Ebay and Amazon?
If I understand it correct, I have the right RPM with the 2S battery but I have to buy a minimum 200A ESC to get run with a little bit overcapacity, right?