Putting ice on motors?
07-24-2008, 02:25 PM
#16
Aside from the obvious safety factor with dry ice burns, I don't think it would work very well. Dry ice doesn't melt, it turns directly to gas. Regular ice transfers heat very readily as it melts to the shape of the can.
The ice was intended to be used prior to the race to cool the motor so it would take longer to overheat, and it does work somewhat. Putting it on the hot motor after the race is just asking for your magnets to crack. Another trick I've seen is using compressed air in a can. Turning the can upside down will allow the propellant (propane?) to come out and it will frost a motor over quickly. At $6/can it's kinda spendy though.
The ice was intended to be used prior to the race to cool the motor so it would take longer to overheat, and it does work somewhat. Putting it on the hot motor after the race is just asking for your magnets to crack. Another trick I've seen is using compressed air in a can. Turning the can upside down will allow the propellant (propane?) to come out and it will frost a motor over quickly. At $6/can it's kinda spendy though.
07-24-2008, 03:55 PM
#18
07-24-2008, 03:57 PM
#20
07-24-2008, 04:14 PM
#22
Motors and batteries have come a long way from back when we used ice or cold water to get more out them . With the motors and batteries of today you don`t need to do any of that stuff . Back then we had to gear the motors so we could make a 5 minute run out of the batteries back then , which created a lot of overheated motors which is why you hear about using ice . Now days you can nearly run a whole race day on a battery . The ice and cold water tricks worked great back then , but aren`t needed in todays world IMO .
07-24-2008, 04:21 PM
#23
well idk if I need it but 10 minutes of my MF2 jumping with an occasional speed run here and there it got really hot. I think 1 reason because of the gearing, I have mine geared 23/86 for a stock 27t P2K2 motor. How will temps decrease if I lower the gearing to 17 or 18?
07-24-2008, 05:09 PM
#25
For a MF2 and a 27 turn stock you want to gear it at about 19-20 and is why your motor is getting so hot . Going down even one tooth can make a big difference in runtime and temps . Over gearing like that creates a lot more heat as you know and in time will burn up the windings and wear the comm a lot faster . Are you gearing it so high because want more top end ?
07-24-2008, 06:12 PM
#26
For a MF2 and a 27 turn stock you want to gear it at about 19-20 and is why your motor is getting so hot . Going down even one tooth can make a big difference in runtime and temps . Over gearing like that creates a lot more heat as you know and in time will burn up the windings and wear the comm a lot faster . Are you gearing it so high because want more top end ?
07-24-2008, 06:28 PM
#27
Dropping down on pinion gear will help greatly.. You have that motor geared way to high right now. You can buy any brand pinion gear as long as it is 48 pitch.
Surely your local shop has pinion gears from someone that they sell.
Surely your local shop has pinion gears from someone that they sell.
07-24-2008, 06:38 PM
#28
Well this is the track that I will be running on, http://youtube.com/watch?v=yClTKCBPgn8 and you really dont need alot of top speed. I would never let it get soo hot I cant touch it for 4 seconds. I dont want top speed really. I just got the motor and put my pinion gear on it. And now I find out that I got a Losi XXX Buggy in 2002 used that came with the SAME pinion gear and I have been using it ever since!!!!! On some ot the teeth they arent straight and since my LHS doesnt carry Losi parts I kept putting it off ordering it. But when I go to the OCRC (the video that I linked) they have a hobby shop there and they have everything I need. I am gonna get Losi yellow springs and a 18t pinion. Do you think the motor will overheat with 18/86 gearing on GP3300 6 cell packs and a P2K2 motor for say the mains and qualifing?
Your motor will not overheat if you put a 18 tooth pinion and it will get you a little quicker off the line as well . As mentioned you can use any brand pinion gears as long as you get 48 pitch . You should like yellow springs on the truck as I have .
07-24-2008, 06:40 PM
#29
ok, what I did was put half 25wt/half 30wt Losi shock oil in my rear shocks. Is that good with yellow springs for a small track like OCRC?
07-24-2008, 07:04 PM
#30
i used to use spaghetti copper tube run in grill pattern that laid down in the gaps of the heatsink and pumped ice water thru a loop via a very small aqua pump. pretty neat thing to have fun with years ago.
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