This is the Great Planes Rimfire 50cc 80-75-230 Outrunner Brushless Motor.

Features:

• Double shielded bearings
• Designed for explosive acceleration and maximum torque
• Virtually maintenance-free; no commutators or brushes to wear out
• Lightened aluminum can houses high torque rare earth Neodymium magnets

The Great Planes RimFire motors have revolutionized brushless outrunner technology! The combination of competitive price and superior performance makes these power plants a remarkable value. Equip your airplane with a Great Planes RimFire, and watch it reach new heights!

Includes:
Great Planes ElectriFly RimFire 80-75-230 Brushless Outrunner Electric Motor, Motor Mount (GPMG1212), 6mm Male and Female Connectors, four 5.5 x 11mm Countersunk Motor Mount Screws and Instruction Manual

Requires:
High Voltage Speed control for Brushless Motors such as the Castle Creations HV Series
Propeller: 22 x 8 - 26 x 10 (due to the high torque and high RPM of this motor the use of electric-only propellers is not recommended)
Aircraft Application
3D Airplanes: up to 18.0lb (8.17kg)
Sport Planes: up to 28.0lb (12.7kg)

Can Diameter: 3.14" (80mm)
Can Length: 2.9" (75mm)
Shaft Diameter: .39" (10mm)
Mounting Space Length: 3.44" (87.3mm)
RPM/V (kV Rating): 230
Input Voltage: 33.3-55.5V (9-15S LiPo)
Connector: 6mm bullet plugs
Max. Constant Current: 110A (at 12S)
Max. Continuous Power: 5000W
Max. Surge Current: 135A (at 12S)
Max. Surge Power: 6500W
Max. Constant Watts: 5000W
Weight: 44.1oz (1250g)