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View Full Version : Wattage Cobalt 400 27 Turn - ESC/Prop/Batt?


Trackhappy
10-08-2005, 11:14 PM
Hi Guys.
I have purchased a Wattage Cobalt 400 27 Turn motor to fit into a Graupner Funky Chicken (Don't blame me, the Wife insisted!!).
Anyway, what I want to know is what ESC to use and what prop. I'd like a folder as the chicken has no landing gear, but opinions on that are good too.
Cheers.
Trackhappy

watt_the?!
10-08-2005, 11:22 PM
i found this setup that you might like, although you may want to consider a geared setup, depending on your application:

Motor wattage cobalt 400 x 27 turn DD
30 amp speed control
8x4 prop
draws 18A right off the charger.




what is max amps continuous for that motor?

Also, is it the same as the Wattage Super Cobalt 400?

Cheers,

Tim.

Trackhappy
10-09-2005, 01:02 AM
Thanks Tim.
I don't know the details, as it was supplied without any paperwork. Unused, but not new. I believe they came with Wattage kits. What voltage was that spec.? I have a 3S2P Lithium (3600mAhr), but I suspect 11.1V is too much. If I change it into a 3P2S, do you think it would be ok? I'm not looking for ultimate performance here, the 'Chicken' is not exactly a sports model ;). Longer battery life is of more importance.
Cheers.
Glenn.

Dr Kiwi
10-09-2005, 04:17 PM
You might well be better off with 2s and then you can run a bigger prop for more thrust/less speed - the Funky Chicken is not a pylon racer!

Dr Kiwi
10-09-2005, 04:23 PM
Here are some specs - so it looks as though 3s is not recommended anyway. It is only ~2400Kv so I would have thought 3s wouldn't over-rev it, but what do I know. It looks like ~200W max, so 25A on 2s would be fine.


Watt-Age Super 400 Cobalt Motor (27T)

Click here for a full profile (http://www.rcuniverse.com/product_guide/engineprofile.cfm?engine_id=855)


Engine Type:ElectricClass:Standard Rotating Can:No Minimum Cells:5Maximum Cells:8General Specs:- 217 Watts
- Magnets: Cobalt
- 7.00 Volts
- 18.00 Low Amps
- 31.00 High Amps
- 2395 RPM/Volt (Kv)
- 27 Winds
- Ball Bearings: 1
- Weight: 3.70 oz.
- Shaft: .125 in.

Trackhappy
10-09-2005, 08:57 PM
Thanks for the information. I think 2S is in order. 3S would drag the current too high at a guess. The chicken might just lay an egg.

watt_the?!
10-10-2005, 12:31 AM
Thanks for the information. I think 2S is in order. 3S would drag the current too high at a guess. The chicken might just lay an egg.

lol..:rolleyes:

Trackhappy
10-10-2005, 10:56 AM
So, the go seems to be 8x4, 2S Lithium, 30Amp controller. Any suggestions on reasonably cheap and cheerful controllers that'll look after the LiPos?

LuckyArmpit
10-13-2005, 11:26 AM
I am running a wattage cobalt 27 turn on an Edge RC BOP. 6x5 prop and 8 cell SCR packs. This is in a pusher config and I have the prop pretty close to the back fin. Man is it loud!!! The esc I'm using is a 30 amp rating. Flight times aren't very long due to the mah rating of the pack but its fine. I know FMA and Dymond make esc's that are lipo compatible in that you program in the LVC if your using lipoly packs. I have one of each and always have to refer to the instructions on how to set it up.
I will tell ya, that BOP has taken a tremendous beating when I first got it.
Its a hard model to hand launch and needs a very strong throw. Once its up though, hold on to your fruit of the looms!

Dave...

legend_of_lazz
07-13-2007, 02:25 AM
hi guy, may seem like a bit of an odd questions, but i have recently purchased a PC-9 with a wattage super cobalt 400 27T, i'm not sure if the motor is defective or not, as i have little experiance in the area, the engine shaft is impossible to turn with bare hands, as it is too hard. It is also very rigid with the 7x4 prop attached, is this normal?
Thanks

panzerd18
11-19-2007, 09:17 AM
Its normal the cogging is very strong from the strong magnets. I am running a 2S lipo with a folding CAM 9-4.5 prop and I think its over propped as the motor gets really hot.