Xnova brushless high performance outrunner motor for 550-620 size helicopters for extremely hard 3d flying on 6-8s. For sport flying or longer flight times, the 2.5y or 3y is more suited. Extreme powerful motor for Goblin 570, Synergy E5 - E6, Logo 500, Gaui X5,T-rex 600 or Logo 600. High qual. Neodym Mag.heat res. up to 150 degree C.Specialized wires,heat resistance up to 250 degree C.Precise balanced.High performance stator metal sheet.Optimized ventilation.High quality NMB bearings.Marked leading high effiency up to 92%.Superb quality and machining of CNC parts.