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Easy gear ratio/motor question... (I hope)

Started by Garry S , Feb 27 2017 12:00 AM

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6 replies to this topic

#1 Garry S

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Posted 27 February 2017 - 12:00 AM

I'm using a Pro Slot PS-2000 16D balanced motor in a Flexi chassis on my home (Gerding) track, 76 ft length, fish tires/no glue. Gearing 9/26 makes wheelspin much more controllable then normal 9/30-9/31 and gives faster laps. My concern is that this tall a ratio will overheat the motor...

Armature temp stabilizes at about 150°F after 10+ laps. Any idea what the temp limits are on these motors?

Garry Stoner

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#2 Dominator

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Posted 27 February 2017 - 01:18 AM

What voltage are you running at?

If you're running around 12 volts or higher I would gear 7/27. If you're less than 12 volts 8/28 should be good.

The lower gearing will allow the motor to run cooler and make the car more drivable.

A motor is only as fast as the chassis it's in.

Dominic Luongo

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#3 Kevin Donovan

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Posted 27 February 2017 - 06:42 PM

If it doesn't stink at the end of the heat you're okay. Cool it off with a fan and keep going.

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#4 airhead

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Posted 27 February 2017 - 07:30 PM

Lick your finger and touch the motor, if it sizzles, then go to a lower gear ratio.

Taylor Davis likes this

Billy Watson

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#5 MSwiss

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Posted 27 February 2017 - 08:20 PM

150 F sounds really cool.

I don't think any motors run at room temperature.

In the late 80's, early 90's, G7 motors ran hot enough to melt the lead wires off, pretty regularly.

Mike Swiss

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