Dry Ice ?
#1
Dry Ice ?
Is it legal to use dry ice to cool motor during racing ?
I'm thinking to use dry ice cube, mount it to motor with 2cm wide rubber band, and enjoy -78.5C cooling.
I'm thinking to use dry ice cube, mount it to motor with 2cm wide rubber band, and enjoy -78.5C cooling.
#2
Tech Adept
Originally Posted by asw7576
Is it legal to use dry ice to cool motor during racing ?
I'm thinking to use dry ice cube, mount it to motor with 2cm wide rubber band, and enjoy -78.5C cooling.
I'm thinking to use dry ice cube, mount it to motor with 2cm wide rubber band, and enjoy -78.5C cooling.
I wouldn't strap the Dice to my motor though... I'd build a DICE container (like the one for CPU cooling) and put some in that before the race. I'd use LN2 or liquid helium as well, if the motor has no problems at such a low temperature...
The container looks like this (not mine)
#3
Magnetic strength is higher at lower temps. I seriously doubt the lubricants would freeze either.
#4
Tech Elite
iTrader: (22)
cold motors........especially cold stock motors are silly fast. I've experimented with it a bit.....but not enough to really KNOW everything about it....but if you lean a .5" cube of dry ice on your motor and motor plate.....and leave it be for like 10 minutes before your race and run it with the ice still on....it'll be fast.
The fun part about dry ice is that there is no condensation. I've tried regular ice with a sleeve around the motor before with mixed results.
All you can really do is experiment though...
The fun part about dry ice is that there is no condensation. I've tried regular ice with a sleeve around the motor before with mixed results.
All you can really do is experiment though...
#5
Tech Master
iTrader: (12)
Originally Posted by asw7576
Is it legal to use dry ice to cool motor during racing ?
I'm thinking to use dry ice cube, mount it to motor with 2cm wide rubber band, and enjoy -78.5C cooling.
I'm thinking to use dry ice cube, mount it to motor with 2cm wide rubber band, and enjoy -78.5C cooling.
#6
Tech Addict
The cold temps are very good for it. You'll have lower resistance in the windings, higher magnetic field saturation and less power consumption. But the thing you have to worry about is thermal expansion. Even with the dry ice directly against the motor, it's going to heat up. Going from super cooled to 100+ degrees could stress the epoxy in the motor. Possibly causing your magnets to come loose from the can.
Tony
Tony
#7
Tech Master
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Not to mention what it could do to your armature
#8
Tech Master
iTrader: (1)
Dry Ice is a way old school idea from the eighties.. It was never deemed illegal.. You can legally use freeze spray which basically does the same thing.. There use to be companies that had clip on heat sinks that were hollow and had a cap.. put dry ice in them an go.. It really didnt catch on back then..
#9
Cold motor = better performance. Motor way too cold = brittle epoxy. Brittle epoxy + impact = #@$^@%!^$% Well, just something to consider...
#10
Originally Posted by burbs
Dry Ice is a way old school idea from the eighties.. It was never deemed illegal.. You can legally use freeze spray which basically does the same thing.. There use to be companies that had clip on heat sinks that were hollow and had a cap.. put dry ice in them an go.. It really didnt catch on back then..
#11
Originally Posted by RcCzarOfOld
The cold temps are very good for it. You'll have lower resistance in the windings, higher magnetic field saturation and less power consumption. But the thing you have to worry about is thermal expansion. Even with the dry ice directly against the motor, it's going to heat up. Going from super cooled to 100+ degrees could stress the epoxy in the motor. Possibly causing your magnets to come loose from the can.
Tony
Tony
#12
Where can you buy Dry Ice and how much is it?
#14
I just Googled it and I read it was like 6 bucks for 10 pounds.
#15
Tech Fanatic
iTrader: (1)
As Big Jim used to say:
Additionally, it could be accidentally spilled on a neighboring person pitting next to you. Or if someone didn't know it was there, they may accidentally touch it.
Dry ice is frozen C02. It's temperature is -109 degrees F or -78 degrees C. Notice the minus sign. That's 141 deress COLDER than regular H20 ice. It's cold enough to burn you and cause you serious pain and injury. You may be savvy enough to use it with problems, but maybe some of your racing peers who see you doing it and try it are not. I don't want anyone to get injured.
Dry ice can crack the magnets.
Your skin can stick to it and have to be surgically removed and can cause serious burns at the very least if touched with the naked hand. Stay away from it. It gets the motor too cold anyway.