Download video: Building a Cheap Quadcopter At Home (1) - Lift Off
Channel: The Post Apocalyptic Inventor
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These (like all PC-Fans) are powered by BLDCs (Brushles DC-Motors). You cannot reverse their rotation by changing the POLARITY . That only works with old fashioned "Brushed DC Motors".
Model number of the Server Power Supply: HP - DPS - 700 CB-A.
I recommend you not to buy this unit simply for this unit . A wide variety of fan -motors, salvagable from several devices / manufacturers could be used.
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