Brushless motor is a 3-phase AC synchro motor with tightly packed windings to deliver high magnetic concentration for optimum power. They are fitted with dual ball bearing and heat-treated hardened shaft to give you maximum efficiency.
Battery: 6-10 cells Nicad/Nimh, 2-3 cells Lithium Polymer
Current: 8-12A (> 75% efficiency)
Dimension: 20 x 31 mm
Shaft diameter: 2mm
Weight (with wire): 47g
Weight for flying model: 200-500g