big resistors inside handlbar ends


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pudd750
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big resistors inside handlbar ends

Postby pudd750 » Tue Nov 13, 2012 8:10 am



gears in the cranium got grinding this morn and so far cant think of why a suitable resistor couldnt be inserted in a carbon fiber , fiberglass or other suitable insulating tube then inserted in the handlebar ends- for cold riding



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virgilmobile
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Re: big resistors inside handlbar ends

Postby virgilmobile » Tue Nov 13, 2012 10:55 am

A thought.....No insulator needed....How bout a LED load resistor....They get plenty warm.
The only problem is little heat transfer through the grip foam and difficult to regulate the temp of the metal.Too hot and the plastic throttle assembly melts.
I rode many times below 0....Thermolite gloves inside Thermolite mittens.Snow boots and Thermal coveralls with a down Jacket.Don't forget the long johns either.

That's why I live in Louisiana now. :D

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Re: big resistors inside handlbar ends

Postby WingAdmin » Tue Nov 13, 2012 12:06 pm

virgilmobile wrote:A thought.....No insulator needed....How bout a LED load resistor....They get plenty warm.
The only problem is little heat transfer through the grip foam and difficult to regulate the temp of the metal.Too hot and the plastic throttle assembly melts.
I rode many times below 0....Thermolite gloves inside Thermolite mittens.Snow boots and Thermal coveralls with a down Jacket.Don't forget the long johns either.

That's why I live in Louisiana now. :D


I measured a LED load resistor that I put on my bike, on the turn signals - so it was only running at maybe 50% duty cycle - and after a few minutes, it was 175 degrees. And that was with it strapped (using stainless screw clamps) to the frame of the bike to use the frame as a giant heat sink. That was with a 70 degree ambient temperature. ABS melts at 221 degrees, so at a 120 degree ambient temperature (easy to achieve up under the bodywork of the bike, especially around the rear tire, where these are mounted) it could do damage. I made sure it was well away from any plastic/plastic mounting points.

It would be more than capable of melting grips and throttle tubes - you'd definitely need to regulate it somehow, or use a higher resistance unit that would generate less heat.


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