As someone who has only ever sailed RC yachts I have very little knowledge on electrics. (as in nil)
I am scratch-building a 39" semi-scale model of a French Customs vessel with a hull very similar to a Perkasa.
I am aiming for scale speed (plus a bit) and planning to power it with two brushless outrunners through a single ESC.
Spec is as follows,
Two Keda outrunners 2837/18 with 830kv
Seaking 60A forward and reverse ESC
M4 shafts driving 40mm brass props
On a 7.2v NimH battery that theoretically gives me 5976 rpm - is that enough as a starting point ?
8.4 = 6972
9.6 = 7968
12 = 9960
The ESC is fan-cooled by a 5v, 7.2v max fan. If I go bigger than 7.2v I will need to separate the fan power supply to a separate 6v battery and it would seem logical, if I do this, to disarm the BEC and use a separate 6v battery to power both the receiver and the fan unit.
Is that sensible ?
Its mainly that I have to buy the batteries and would like to end up correct first time.
Thanks for any advice you can give.
Gary.