Go Back  R/C Tech Forums > General Forums > Electric Off-Road
Are electric motor fans really effective? >

Are electric motor fans really effective?

Are electric motor fans really effective?

Reply

Old 03-13-2010, 03:05 AM
  #1  
Tech Addict
Thread Starter
iTrader: (12)
 
*BBB*'s Avatar
 
Join Date: Dec 2009
Location: South Hill, VA
Posts: 611
Trader Rating: 12 (100%+)
Default Are electric motor fans really effective?

Im looking to step up the gearing on my machines and am wonderring if anyone that has used one could give me an idea of what temp changes i can expect..
*BBB* is offline  
Reply With Quote
Old 03-13-2010, 03:06 AM
  #2  
Tech Regular
iTrader: (1)
 
Join Date: Dec 2009
Posts: 452
Trader Rating: 1 (100%+)
Default

are you talking about adding a heatsink and fan to the motor itself?
AmmoJammo is offline  
Reply With Quote
Old 03-13-2010, 03:10 AM
  #3  
Tech Regular
iTrader: (8)
 
Join Date: Sep 2009
Location: Slovenia
Posts: 464
Trader Rating: 8 (100%+)
Default

"There's a big difference between using a fan to make a hot, overgeared setup barely usable, and using a fan to keep a cool, properly geared setup even cooler."


This does drop temps a bit:

http://monster.traxxas.com/showthrea...=castle+blower
V0RT3X is offline  
Reply With Quote
Old 03-13-2010, 03:17 AM
  #4  
Tech Addict
Thread Starter
iTrader: (12)
 
*BBB*'s Avatar
 
Join Date: Dec 2009
Location: South Hill, VA
Posts: 611
Trader Rating: 12 (100%+)
Default

yes im talking about adding a fan to a MM2200 motor.. vortex whats the difference?
*BBB* is offline  
Reply With Quote
Old 03-13-2010, 03:22 AM
  #5  
Tech Addict
Thread Starter
iTrader: (12)
 
*BBB*'s Avatar
 
Join Date: Dec 2009
Location: South Hill, VA
Posts: 611
Trader Rating: 12 (100%+)
Default

checked out the link.. Awesome reply man! thanks!! u must have seen that i had the MM in my sig?
*BBB* is offline  
Reply With Quote
Old 03-13-2010, 04:25 AM
  #6  
Tech Elite
iTrader: (53)
 
Join Date: Feb 2008
Location: Belleville, MI
Posts: 4,518
Trader Rating: 53 (100%+)
Default

if you need a motor fan your car isn't set up right its either over geared, the drivetrain is bound up, or you're running to many cells for that motor. Keep in mind just because a fan is cooling the motor can the rotor is still running way to hot and could still demag its self.
nv529 is offline  
Reply With Quote
Old 03-13-2010, 04:40 AM
  #7  
Tech Master
iTrader: (35)
 
rcterp's Avatar
 
Join Date: Oct 2008
Location: No mans land.
Posts: 1,032
Trader Rating: 35 (100%+)
Default

The cooler a motor runs the better. I found the sweet spot for my motor to run without the fan, I then put on the fan and the temps were about 10 degrees cooler. I don't gear the car with the fan I just use the fan to keep the motor cooler and happy.
rcterp is offline  
Reply With Quote
Old 03-13-2010, 06:55 AM
  #8  
Tech Apprentice
iTrader: (1)
 
Join Date: Mar 2010
Posts: 56
Trader Rating: 1 (100%+)
Default

ive noticed an average of 20 deg drop in temp with a heatsink and fan.
Dtm1 is offline  
Reply With Quote
Old 03-13-2010, 07:42 AM
  #9  
Tech Addict
 
Join Date: Feb 2010
Location: Santa Clarita, CA
Posts: 530
Default

I have to agree with the other posts on here. Make sure your motor will live without the fan as it is just too easy for it to get damaged while racing. I run a Neu 1512 and with no fan it will hit 155F if I run it hard for 15+ minutes. That is safe but pretty hot. With a small 50mm pc northbridge fane just blowing past the end of the motor, it doe snot get over 130F. About 25 cooler because my body does not have much in the way of air flow openings. Just circulating air really helps.

The same rule should apply to the ESC. I am using just an original 1/10 Mamba Max and it has managed to finish a race with a dead fan without thermalling, but it is a bit close for my comfort. The heat sink temp hit nearly 180F, OUCH. The thermal shut down does not kick in till over 200, and since it does have a thermal shut, it is sorta safe, but also a lot of stress for no reason. Too bad I can't run dual fans in case one craps out again.
GSMnow is offline  
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service