USING THE MUCH MORE RACING COOLING FAN STAND
High competition RC racing generates a lot of heat. The MMR Cooling Fan Stand is
a small and convenient tool for combating heat in the pits. The unit consists of
two brushless cooling fans that blow upwards toward the grills. It provides
enough airflow to perform miscellaneous cooling tasks, but is not so strong as
to prevent it from being a useful charging aid.
The Cooling Fan Stand can use any 12V power source. You can also power the unit
using the output control pin on the MMR Cell Master charger. The Cell Master
also gives the option of programming when the fan activates during charge or
discharge.
Here are some great uses for the Cooling Fan Stand:
Provide ventilation for battery during charge:
Sometimes a battery requires some ventilation in order to not overheat in low
ventilated areas or high heat conditions. This is especially true for today’s
newer batteries that are more temperature-sensitive.
Too much airflow during charge, however, will overcool the batteries and cause
them to lose power. The placement of the fan stand and the orientation of the
fans can adjust how much airflow is provided.
Placing the stand a slight distance away from the battery with the fans blowing
toward the battery will create the strongest amount of airflow.
Unless you are in very high heat conditions, this could be too much airflow. If
this is the case, you can lessen the effect by either moving the stand further
from or directly over the battery. When you place the stand directly over the
battery, the fans will blow away from the cells, pulling air from around the
battery pack and providing a medium amount of ventilation.
Because the fans pull air from the battery rather than blowing directly upon it,
the cooling effect is reduced.
If you still desire less ventilation, you can place the fan stand on its side a
slight distance away from the battery (with the fans still blowing away from the
battery).
This method will provide the least amount of ventilation.
***In very high heat conditions, we also recommend the MR-BHB BATTERY HEATSINK;
a charging aid utilized by some of the best RC drivers in the world!
If you have a Cell Master charger, you can program the charger to start the fan
stand when the battery reaches a certain temperature. This setting can be
adjusted in the setup menu for each charging profile (see pic below).
You can also program whether or not the fans remain on after charge or
discharge. This setting can be adjusted in the main setup menu. “On” is set
by temperature; the set value is the minimum battery temperature at which the
fan will remain on. When the battery temperature falls below this value, the fan
stand will power off.
Cooling a battery while traying or dead-shorting:
Most matchers will tell you that it is just fine to run a NiMH battery pack more
than once in a day, but that you should allow the battery cool fully before
charging it again. Many racers now like to tray or dead-short their batteries
before charge, though, and this prolongs the amount of time the cells stay warm.
By placing the cooling fan stand over your discharging tray, you can keep the
battery cool as it equalizes or dead-shorts.
If you prefer to cool a battery before you tray it, you can just place it on top
of the fan grills for a couple of minutes.
Cooling motors:
High competition racing will usually get your motors very hot. This can
especially become a nuisance when you are ready to perform maintenance, but your
motor is too hot to touch.
The most convenient way to cool a motor after a race is to just place the
Cooling Fan Stand on top of or under the car with the fans blowing toward the
motor.
The grills will prevent the fan blades from touching anything, and the
non-conductive anodized surface will not short anything on the car. If your
chassis has an opening beneath the motor, you can also place your car on top of
the fan stand while you perform other maintenance.
If you have already managed to remove the hot motor from the car, you can easily
just place it on top of the grills.
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