Usually when someone tells you "you're hot," it's a good thing. But sometimes being hot can be a very bad thing. With the new cell technology on the market these days, electric powered cars are going faster and faster. Low wind motors are capable of pulling some major amps from these new cells, resulting in motors that are running hotter and hotter than ever before. How do you combat this type of heat? The addition of a small fan to your car can make the difference between first place and not finishing. In this article, I'll walk you through a step-by-step procedure on how to install a small fan into a touring car.
WHAT'S WRONG WITH HOT?
A hot motor is not good. First off, hot motor magnets lose some of their magnetic strength; secondly, if a motor is too hot, the solder connecting the ESC wires to the motor will melt and come loose, effectively ending your race before its time. If the motor wires don't completely come off, the brush shunt will often times unsolder from the endbell. If this occurs, you'll see an immediate loss of ponies.
First thing you'll need to do is locate where you'll mount your fan. 1. Your fan needs to be pointing air toward the endbell of your motor. Ideally, you would want the fan pointing directly at the top of the motor, but different chassis might call for different angles. You may have to move the car's ESC or receiver in order to make the fan fit.
You will be inserting the servo pigtail into the "Batt" connection on your receiver. 2. Plan a wire route for the pigtail and the leads coming out of the fan. You will be splicing the leads together. Give yourself a little bit of slack to move things around, if necessary. 3. Once you're comfortable with the length of the pig tail cut it accordingly.
Strip the positive and negative leads coming out of the fan, and on the pigtail. 4. If you have a signal lead (white or orange) coming out of the pigtail, cut it off just above the plug itself – you won't be needing that.
5. With bare wire exposed, slide a piece of shrink tubing over the leads coming from the fan and move the heat shrink as far away from the wire ends as possible. 6. Tin each lead with flux and get ready to solder.
7. With both the pigtail and the fan leads, solder the positive-to-positive and negative-to-negative leads together. 8. After they've cooled, slide the heat shrink over the solder joints and shrink the solder with a blow dryer, heat gun or match.
Install the fan in the same position you originally planned in step one. Make sure that the fan direction is pushing air toward the endbell; direction should be indicated on the fan. 9. Mount the fan in place with a small strip of servo tape between the fan and the chassis, making sure to clean each surface first.
10. Lastly, plug the pigtail into the "batt" or third channel port on your receiver. Make sure that the direction is correct and that the positive and negative (red and black, or red and brown) wires line up with the servo and ESC leads already installed. Once the fan is plugged in, you're all set. The fan will not turn on until you switch your ESC on.
Installing a fan like this one will keep your touring car motor running cool and help keep you in the race.