In this video I 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 ӂrushed DC MotorsԮ 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. Support my channel: Patreon: https://www.patreon.com/TPAI Paypal: https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=inventordonations%40gmail%2ecom&lc=US&item_name=The%20Post%20Apocalyptic%20Inventor&no_note=0¤cy_code=USD&bn=PP-DonationsBF%3abtn_donateCC_LG%2egif%3aNonHostedGuest