In this video author will try to build a basic platform for a quadcopter with salvaged motors from small axial fans and some other household items. 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. Author 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.
Courtesy: The Post Apocalyptic Inventor