-
- Administrator
-
-
Before your membership becomes valid, you will receive an email that must be answered.
Please check your spam folder or this email.
ka8 electrified
ka8 electrified
hi
can anyone advise on best electric set-up
for 5 metre ka8 glider
ir weighs 9.5 kg
i havent a clue , so any help would be great thanks
mick
can anyone advise on best electric set-up
for 5 metre ka8 glider
ir weighs 9.5 kg
i havent a clue , so any help would be great thanks
mick
Re: ka8 electrified
Mick,
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.
BC
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.
BC
Re: ka8 electrified
hi Barry
thanks for the reply
i would like to take off from dolly
i dont want it to be ballistic , just something
for a nice steady climb
hope that helps ?
thanks for the reply
i would like to take off from dolly
i dont want it to be ballistic , just something
for a nice steady climb
hope that helps ?
- terry white
- Posts: 508
- Joined: 18 Mar 2015, 21:08
- Location: wareham,dorset.england
Re: ka8 electrified
Hi Mick i'm sure I can help you, been flying large scale E. power for a long time now, but I'm just off to Shropshire to fly in the Mynd fly-in get together (no E.power allowed on the Mynd though) I will post when I get back if you haven't heard from others. Regards Terry.
-
- Posts: 573
- Joined: 30 May 2015, 20:35
- Location: Sutton Bank, North Yorkshire
Re: ka8 electrified
Hi Mick,
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.
Rog
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.
Rog
- chris williams
- Posts: 1549
- Joined: 10 Mar 2015, 10:50
- Location: Blandford Dorset
Re: ka8 electrified
Turnigy very helpfully name their range of motors to compare directly with glow motors. Thus the G60 is rated as similar to a .60 glow motor, and can very conveniently run on 2 x 3s's. My Super Javelot flies well on the 500Kv version, although there might not be enough power to get off a dolly.
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
[youtube][/youtube]
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
[youtube][/youtube]
Re: ka8 electrified
thankyou very much gents
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
mick
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
mick
- RobbieB
- Posts: 547
- Joined: 07 Mar 2015, 22:22
- Location: North West
Re: ka8 electrified
So tempting...........Barry_Cole wrote:'If you want to go off a dolly..................'