- Posts: 1366
- Joined: 10 Mar 2015, 09:30
- Location: Hampshire UK
I depends a lot on what you want the motor to do...
If you just want power to get you back to the top of a slope, that is one option.
If you want it to take off from a dolly, then that is a different option.
Can you give us an idea of what you require.
- terry white
- Posts: 555
- Joined: 18 Mar 2015, 21:08
- Location: wareham,dorset.england
- Posts: 382
- Joined: 30 May 2015, 20:35
- Location: Sutton Bank, North Yorkshire
At 21lbs weight I'd want at least 1200W of power for ROG. You can get this from a 6s LiPo which is handy because any bigger and you need to pay lots more for your battery/ESC/charger.
A 6s battery gives you about 22V voltage (that's 6 cells at 3.7V per cell), meaning you need to draw a current of about 55A to get the 1200W power (because power = voltage x current).
To get a 55A current you need a motor with the correct kV and a prop to match. I suggest looking at the motor / prop combos used successfully by Chris Williams for models of comparable size/weight. He often details them on his excellent videos. It's got to be a good starting point.
Hope this helps. Sorry I have no 6s set-ups of my own to recommend. Good luck.
- chris williams
- Posts: 1157
- Joined: 10 Mar 2015, 10:50
- Location: Blandford Dorset
Here's the full spec...
Turnigy G60 Brushless Outrunner 500kv
Turnigy Brushless ESC 85A w/ 5A SBEC
14/8 folding prop
2 x 3s Lipos
- Posts: 264
- Joined: 20 Mar 2015, 22:00
- Location: kent
its really helpful , will have a look at the turnigy
as im a nitro dinosour so understand that bit
is it around 100 w per lb i need ?
or could i get away with 70w per lb
thanks again for all your help