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Old Aug 25, 2014, 01:28 PM
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Slot Car motors

Has anyone ever used a slot car motor in their boat? What kind of batteries to you use? And will it overheat?
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Old Aug 25, 2014, 05:22 PM
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South Korea, Gyeonggi-do, Ansan-si
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I've seen the motors in 1/32 and 1/24 slot cars used for everything including boats. This is typically a Mabuchi 130 size motor and some specify 3-12 volts depending on designation.

The smaller box style open motors I have seen used too, but I am not sure of the specs for those.
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Old Aug 26, 2014, 02:18 PM
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I was using 7.4 Lipo with a similar motor, and they cooked.
Would a LIPO make a difference?

Eric
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Old Aug 26, 2014, 10:30 PM
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Quote:
Originally Posted by HomePort Models View Post
I was using 7.4 Lipo with a similar motor, and they cooked.
Would a LIPO make a difference?

Eric
Yes, even some of the motors in rc cars can't handle 7.4v

Losi has a pretty nice 180 the size of a slot car motor that will handle 7.4v.The motors used in the Losi clones such as Hsp and Microx will not handle 7.4v.I'm not sure what the issue is, I'm guessing the better motors are just assembled with better glues, brushes, etc and handle the extra heat better.
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Old Aug 27, 2014, 01:04 PM
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That is great information on the 180s.
I am ordering a couple today.
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Old Aug 27, 2014, 01:27 PM
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That is great information on the 180s.
I am ordering a couple today.
What are you putting them in?There's alot of nice small motors that will handle 7.4v, I think Miniq car 130's also handle 7.4v.There's a member on the crawler forums named Danally that offers high power custom wound Losi motors.

If you have enough room for a standard size 180 then there's a few cheaper options like the Redcat Sumo 180.I used a Redcat motor in my Litehawk Chase and is pretty fast.The Losi motor has more power but they run hot, Redcats 180 had alot of room to solder on a tube for water cooling and it stays nice and cool.Here's a thread showing a couple of 180 upgrades in 10" catamarans
http://www.rcgroups.com/forums/showthread.php?t=2217204
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Old Aug 27, 2014, 02:03 PM
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This is what i have in there now:
http://www.horizonhobby.com/products...FaVZ7AodliIAVw
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Old Aug 28, 2014, 04:38 AM
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A motor in a slot car typically has cooling airflow around it and on any circuit will have varying power applied. A motor deep inside a hull doesn't, and you tend to use full power in long bursts. You do need to de-rate so that the motor can get rid of any heat it generates, or make other arrangements for getting the heat to the outside of the boat.
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Old Aug 29, 2014, 05:58 AM
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I made a 26cm mini cat using 2 HO slot car motors on 350mah 2s. Not brilliantly fast but it worked ok. No heating problems. 16mm props LH and RH. 3.5g servo and 5A ESC.
Built from 1/32 balsa and several coats of dope to finish.
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Old Aug 29, 2014, 06:06 AM
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Originally Posted by KIWINB View Post
I made a 26cm mini cat using 2 HO motors on 350mah 2s. Not brilliantly fast but it worked ok. No heating problems. 16mm props LH and RH. 3.5g servo and 5A ESC.
Built from 1/32 balsa and several coats of dope to finish.
Beautiful boat, thanks for sharing.Do you have any pics of the build?
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Old Aug 29, 2014, 07:40 AM
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Sorry, no. I just cut out the bits from 1/16th and stuck them together. Covered it with 1/32nd balsa, carved and hollowed the cockpit from light balsa, canopy from plastic used to package Easter eggs. Fitted the motors and the shafts (from 0.8mm rod and matching tube). Made the rudders and linkage, (very fiddly!!), mounted the servo, Rx and ESC. Found a place for the battery up front.
Didn't take to long to do.
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