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Burning up H&R Lightning motors?


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#1 Troy Beeler

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Posted 28 July 2020 - 09:13 AM

For some reason I have basically burned up three H&R Lightning motors in a Womp chassis.

 

I run a bunch of Womp races with a variety of motors. I have run a bunch of Mini Brutes with good success.

 

And wanted to try the Lightning. First one, on about a 65 ft. oval, smoked in about 55 laps. I figured that was just bad luck? #2 same track burned up smoking hot in the middle of the third lane change. #3 I went from a 10t pinion to a 9t, gave it a go in practice. And it was very hot in 45 laps or so. So I didn't run it. Then a friend crashed his car bad. And I gave him this one with Lightning to make some laps. plus I wanted to see how it did. It was fast! But at about lap 55 or 60 it would  slow down. And it was very hot!!! We cooled it between every change and put some Redline com drops on it. And it would come back every time, then slow down.

 

I am not sure what could be going on I really don't think I am off on my gearing much. I did put new wire and braids on #3 just to eliminate anything.

 

Anyone have any good ideas? Thanks.






#2 Cheater

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Posted 28 July 2020 - 11:38 AM

You need to figure out why that motor is getting so hot. Drop down to an 8t and see if it runs cooler.

 

What's the power arrangement on the track where you race? What voltage? Is there any chance there's AC leakage in the DC?


Gregory Wells

Never forget that first place goes to the racer with the MOST laps, not the racer with the FASTEST lap


#3 Dave Crevie

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Posted 28 July 2020 - 11:52 AM

The H&R Lightning II  motors are designed to run 9/31, or 3.4:1. We ran a lot of these with the Bensenville group, and found that for both the oval and the routed road courses we had, going down to an 8 tooth pinion let the motors rev more, gave much better brakes, and I don't remember us ever burning one out. Our problem was with the brushes wearing down enough that the brakes started going away. And only after a lot of track time. 

 

On a Womp you will have to use an even smaller crown, so consider going down to a 7 tooth pinion. 


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#4 Troy Beeler

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Posted 29 July 2020 - 08:19 PM

Thanks guys. I am going to give it one more shot. And gear it down.



#5 Troy Beeler

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Posted 03 August 2020 - 08:13 PM

I have #4 in a chassis with an 8t pinion ready to go!!!!!

 



#6 Ramcatlarry

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Posted Yesterday, 09:52 PM

Did it help?


Larry D. Kelley, MA
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