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Unread 23-06-2002, 23:36
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Spinning Fans

Posted by Al Skierkiewicz at 1/28/2001 3:05 PM EST


Engineer on team #111, Wildstang, from Wheeling High & Rolling Meadows High and Motorola.


In Reply to: Drill motor change out question??
Posted by Dennis Hughes on 1/25/2001 7:01 AM EST:



Joe & et. all,
The fan on the Fisher Price Motor melted off the armature to us in Florida last year. Luckily it makes an unusual noise and one of our students persisted that something was wrong. He checked until he found it and sure enough the fan was laying down in one end. (we used this motor on the conveyor assy.) The motor had survived for two regionals and a day of nationals. There was very little smell until we opened it up.
The reality is the fan only is effective when the motor is running near design RPM but when under load it just cannot cool effectively. Both regionals were in the north in March as opposed to Florida in April. A visual inspection after each match is now part of our routine.
Fans on drive motors are always considered during practice and test.
Al



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