Great Planes GPMG5290 Ammo 36-50-2300Kv Brushless Inrunner Motor This is the Great Planes ElectriFly Ammo 36-50-2300kV Brushless In-Runner 2 Pole Electric Motor. FEATURES Brushless, slotless Ammo In-Runner Motors offer an incredible power- to-weight advantage and almost twice the efficiency of Brushed motors Ideal for direct or gear drive use Up to 89 efficient and virtually maintenance-free no brushes to wear out Powered by rare earth Neodymium magnets for high torque and unmatched heat resistance Pre-installed gold plated connectors for plug and play operation when used with compatible ElectriFly Silver Series Brushless speed controls Double sealed bearings Two year warranty INCLUDES Great Planes ElectriFly Ammo 36-50-2300kV Brushless Electric Motor with connectors and four M3x5 machine screws REQUIREMENTS Installing in model and connecting to speed control Propeller, suggested sizes include 10x7E-13x8E SPECIFICATIONS Motor Diameter: 1.42 (36mm) Motor Length: 1.97 (50mm) Shaft Diameter: .197 (5mm) Shaft Length: .591 (15mm) kV Rating: 2300 rpmV Weight: 8.6oz (243g) Input Voltage: 14.8-18.5V Max. Constant Current: 60A Max. Surge Current: 100A Max. Constant Watts: 1110W No Load Current: 2A