Quadcopter "Pirat"

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Video test flight time on 4s5200 battery: Multistar High Capacity 4S 5200mAh is used here: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=13394&Affiliate_ID=hobbyking Afro Slim 20Amp Multi-rotor Motor Speed Controller was utilized for this test: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10271&Affiliate_ID=hobbyking 2216 Multistar motor powers the aircraft, available at: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=13395&Affiliate_ID=hobbyking Brass Knurl Nuts M2.5*5mm(L)-3.5mm(OD) Metric Threaded are used for securing the motor, purchased here: http://www.ebay.com/itm/100pcs-Brass-Knurl-Nuts-M25x5mm-L-35mm-OD-Metric-Threading-for-AV-Radio-Helicopter-Drone-Parts-Kit-Spare-Replacement-/171799351774?hash=item27bfc0da72:g:2j8AAOSwB1JZi5yv