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


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#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




#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.


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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.

#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.


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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.


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#6 Ramcatlarry

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Posted 27 February 2017 - 11:43 PM

Most solder melts over 425 F degrees. Steam at 212.


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#7 Garry S

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Posted 27 February 2017 - 11:53 PM

Ok, thanks guys.  It looks like I'm totally safe at this ratio.


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