Hi guys, please can I have your views on battery types I should use please. I am in the process of refurbishment of a billings white star which is only a small boat with a 3 to 7.2 volt motor in it and a viper marine 15 ESC. I have a couple of NiMH 9.6 volts 8 cell batteries and a NiMH 7cell 3000 mah battery. Are any of these OK to use or should I be looking at lipol batteries and if so what size?
Your 7 cell NiMh will work you may overvoltage the motor ( slightly) but should be ok for pottering around. A 15A ESC limits what you can do. Unless you want to rip out the power plant and ESC consider buying a 6 cell MiMh ( rc car) battery pack.
"that's not a bug its just an undocumented creature."
Sir Terence David John "Terry" Pratchett, OBE (28 April 1948 - 12 March 2015)
Hi Steve I have a Billings White Star that I restored some years ago. If yours is like mine then it will most likely be on the heavy side for the size of the model. A 380 motor with a 30mm 3 blade brass prop powers mine. I have a small Action 10amp esc and homemade BEC. To reduce weight I cut a 7.2 NiCad pack into two sticks and joined them with a soldered length of wire across the bottom end. This allowed me to place the batteries either side of the prop shaft. My rudder servo is over the propshaft in the stern. Correct ballasting can be achieved by moving the batteries fore or aft. Any small 15 amp ESC would be suitable and most now have a built in BEC. The main consideration needs to be weight and size. I agree with Haverlock's suggestion re a Wattmeter if you intend to use the higher voltage batteries with the existing motor. Its a small boat that sails well, but on my club sailing waters it is a fair weather sailor. Good luck Dave 😀