Re: umm.. heat sinks. sorry, we're roookies.....
 

Wow thats a good idea i think ill do that....right..................now.





Im not insain, I'm just...different

Re: umm.. heat sinks. sorry, we're roookies.....
 

we really didn't cook our motors last year so much as having the back deform and bad stuff came out of the slots in the back. I remember there being lots of plastic but i could be wrong...I just remember vividly replacing the motors then havign to disassemblle and reaseemble the gearbox because we did something wrong and the gearbox began binding...heat might have added to that too...but then...but regarding the overheating factor, we were running one of our motors in reverse...on a somewhat inneficient 4 wheel drive powered only by 2 drill motors...and I think it's possible that one of the motors vents was blocked so...not the brightest way to build a drive train ;)

Cool in a can...
 

We have used the cool in a can stuff for years, freezing the snot out of the motors. While I am sure that it is not particularly good for the motors, we have not had a failure that we trace to this practice in 8 years of competitions.

Joe J.

Re: umm.. heat sinks. sorry, we're roookies.....
 

I bet most people here will agree that rapidly cooling the motors will shorten the life span of the motors.
However, the typical use period is still far shorter then the design life of the motor. My dad has a 20 year old drill thats seen alot of use, and still runs fine.

Point being, yes, it is bad for the motor but it won't matter in the time it is needed to work.


Wetzel
~~~~~~~~~~~
Design to meet criteria, don't worry a whole lot beyond that.

Re: umm.. heat sinks. sorry, we're roookies.....
 

Some how I doubt you can cool a motor faster by spraying it will a coolant, than it heats up when the motor is stalled and draws a hundred amps for a second or two without spinning

the coolant isnt that powerfull - its not like a magic freeze ray - when you blast it on something in only looks like it has been instantly frozen because dry ice forms on a very thin layer on the surface.

its neat stuff - a powerfull tool when you need it - get a couple cans and experiment with it to get an intuitive feel for how it works - just dont....um....play with it in any way that can be harmfull or dangerous.

Re: umm.. heat sinks. sorry, we're roookies.....
 

One thing that strikes me as dangerous to the motors is that condensation that would develop on something being blasted with that cold air.