These big motors are engineered to deliver high power for 25 - 35 lb (100cc) Pattern, Scale and 3D-Aerobatic models with 14 cell LiPoly batteries.
This the A150-10, with it's 20 pole, outrunner design creates amazing torque, therefore larger direct drive props can be used without the need for a gearbox. These motors feature Oversized bearings, curved Neo-magnets and a High Efficiency stator design. Additionally you will find a Special Large Concentric bearing located in the rotor to support the rotating mass during extreme 3D-maneuvers.
The prop flange is a standard 6-bolt prop flange, just like the type used on gas engines.