Product Description We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series" The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures. The HK5-4026-1115kv is designed for 550-580 class of helicopter which require a 5mm motor shaft, such as the Mikado Logo 550, running on 6s lipo, or other UAV application requiring up to 4050w of power! Specifications Motor Kv 1115KV RPM/Volt Weight 367.7.0 Grams ( 12.97oz) Motor Body Dimensions 49.5mm x 57.30mm (1.95" x 2.25") External Shaft Dimensions 5.98mm x 36mm (0.235" x 1.42") Continuous Current 135 Amps Continuous Power 2775 Watts Peak Current 180A (2 seconds) Peak Power 4050 Watts (2 seconds) Max Lipo Cell* 6s Stator Diameter 40 mm (1.57 in) Stator Thickness 26 mm (1.02 in) No. of Stator Arms 12 No. of Stator Poles 10 Motor Wind 3T Delta Motor Wire 1.7mm *Higher Cell Count possible with appropriate gear ratio adjustment Included in the Box 1 x HK5-4026 BLDC Motor3 x Female 4mm Connectors3 x Heat Shrink1 x Hardware / Accessory Pack Weight including packaging 400g Full Dimension View Scorpion HK5-4026-1115kv (5x31mm shaft) Full Dimension