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Thread: HH Cobalt Puller- Reborn page 35!

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Old 04-06-2008, 04:27 PM   #121
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Mann0mann- that battery isn't quite enough. For the 10t I would say you need at least a 1600 15C pack.

TK- I can't tell you if it will fit. How much room is around a normal 540 motor in the rig?

Contracted- I have 7t Pullers available for presale on the site again.
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Old 04-06-2008, 04:33 PM   #122
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Default Cobalt Puller 7t--limited stock



I have a new batch of 7t Cobalt Pullers, 4 in stock and 40 going to the machinist on monday.

These can be shoehorned into an sw3 with an r2 tranny, but they are longer motors than a standard 540. The torque is much higher than any other brushed motor that works in a crawler. More wheelspeed, more torque, more power in general. With a 7 slot armature you also get much better slow speed control as compared to normal brushed motors. I run these in every one of my rigs now, with exception to a few scale rigs and my really fast bashers. Yes, they are in fact powerful enough to make me leave outrunner motors for a while. My avatar is the armature.

Get your foot in the door while you can, these motors get snatched up quick

http://holmeshobbies.com/product.php...2&cat=0&page=1

Badgers kick ass vid: http://ca.youtube.com/watch?v=fJS4c36tcjs


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Old 04-06-2008, 04:54 PM   #123
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Good God, that is sick, great vid!
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Old 04-07-2008, 09:10 AM   #124
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...

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Old 04-07-2008, 02:56 PM   #125
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Not that I need one but I had to get one :-P
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Old 04-07-2008, 04:29 PM   #126
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Done
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Old 04-07-2008, 04:39 PM   #127
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Do you have something comparable to this but brushless?
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Old 04-07-2008, 06:05 PM   #128
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Quote:
Originally Posted by 4u2nv View Post
Do you have something comparable to this but brushless?
Not really. The pullers have torque, speed, and low speed driveability. The closest brushless would be a novak goat system but they don't have the drag or torque. A fast outrunner would have the torque but not the low speed resolution.

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Old 04-07-2008, 06:19 PM   #129
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got one too for my prerunner/crawler
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Old 04-07-2008, 06:31 PM   #130
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Quote:
Originally Posted by JohnRobHolmes View Post
Not really. The pullers have torque, speed, and low speed driveability. The closest brushless would be a novak goat system but they don't have the drag or torque. A fast outrunner would have the torque but not the low speed resolution.

Thanks guys! 29 left.
Are you serious, these have more torque than my goat systems, if so
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Old 04-07-2008, 06:38 PM   #131
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Yes, the stator is much larger than the magnet on the Goat. It is also longer, and has more commutation cycles per revolution. All adds up to more torque.
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Old 04-07-2008, 09:43 PM   #132
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Would a 7T with 21T/87T still have enough torque for crawling?
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Old 04-07-2008, 10:09 PM   #133
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Just picked up 2, thanks JRH
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Old 04-07-2008, 10:11 PM   #134
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Quote:
Originally Posted by dezrik View Post
Would a 7T with 21T/87T still have enough torque for crawling?
Yep. You could gear it to the moon and have enough torque if your batteries would deliver the amps.
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Old 04-07-2008, 10:16 PM   #135
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Sorry to get off topic, but what are the rpm per volt for the 10t and max volts?
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Old 04-07-2008, 10:17 PM   #136
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I measured the 10t at 1800, max voltage 4s lipo.

The 7t is listed at 1800 by the manufacturer, but I think that is loaded. It actually spins closer to 2300 by my last measurements.
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Old 04-07-2008, 10:22 PM   #137
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So what kind of battery do you recommend? 20C 11.1v LiPO?
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Old 04-07-2008, 10:40 PM   #138
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A 15C 2100 seems to do the trick on the 7t. You could use a smaller battery with 20C discharge.
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Old 04-07-2008, 10:43 PM   #139
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paypal sent.

thanks JRH!

anychance I will get one of those bad a$$ HH stickers with it?
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Old 04-07-2008, 10:50 PM   #140
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I need to get more stickers made. Already given out about 1000 of em, and I have run out.
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