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Minimum MHA for Rock crawler?

Minimum MHA for Rock crawler?

 
Old 12-16-2008, 12:16 PM
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Default Minimum MHA for Rock crawler?

I just went out with my new 430 mha 3S in an AX10 and while I got the wheel speed I was looking for it stalls the motor in tight stuff.

I had been using 2s 2000 mha and put it in to see and bang I had all the power back.

430 mha 30c = 12.9 amps, 2000 mha 20c = 40 amps.

How much do I need in a 3s to keep the power?

Does the voltage in a 3s mean I can expect to use 30% less amperage and have the same low end power as a 2s?

40 amps X .66 = 26.4, so an 860 mha 30c would be 25.8 amps. Am I working with the right data?

Thanks, Will
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Old 12-17-2008, 02:57 PM
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this section is titled MaxAmps support, may I have some please?
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Old 12-18-2008, 09:38 AM
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Sorry for the delay in help. I'm supposed to get new thread notifications for this area and all new threads should show in highlighted type but for some reason neither of the two worked. I simply overlooked it.

Anyways what your seeing is an over amp situation you shouldn't be using a 430 pack for your crawler. It simply can't handle the current draw that you motor is hitting when you bind or load it up. What motor and esc combo are you running?? Also in the future feel free to e-mail me as well. My e-mail addy is always in my signature below and the e-mail program is always on and open so I can respond to them ASAP.

Best regards,

Jason
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Old 12-18-2008, 10:41 AM
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I am running a Tekin FXR crawler combo(55 turn) at 12/87 with a BEC.

I based my decision on the run time the 2000mah was giving, 1 hour. thinking the 50% increase in voltage would make up for the lose in amperage.
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Old 12-18-2008, 10:51 AM
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Sounds like it would work but a voltage increase doesn't help that much. If you look here: http://www.maxamps.com/products.php?cat=205 you'll see that we don't even recommend th 430 for a crawler pack. I would suggest you look at our 3S 1100 it's a great pack to run with the 55T motor. Actually it's the pack I use in my comp rigs. I can run one pack all day at a comp doing three courses.

Jason
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Old 12-18-2008, 12:16 PM
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Hi Jason

it sounds like you answered my original question in a round about way.


The 1100 3s is the wrong size for my set-up, foot print is one reason I chose the 430 and is the reason I will go with the 1290.

what I was looking at was voltage (7.4) X amperage (40) = 296 watts

the 1100 3s voltage (11.1) X amperage (27) = 299 watts

Too bad I didn't do the math before I ordered a battery, DOOHHHH!

the 1290 3s3p is 11.1 X 38 = 421 watts. I wonder what the watt rating of the 55 is?
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