Scorpion Brushless Motors HK 40mm Series

(22mm Series, HK 22mm Series, 30mm Series, HK 30mm Series, 40mm Series)

Select Motor Size: HK-4020 | HK-4025 | HK-4035

The Scorpion HK-4020, HK-4025 and HK-4035 motors have been developed for the newer 550, 600 and 700 class electric helicopters that are now coming onto the market. These motors are designed to run on 10-12 LiPo cells, and can produce up to 4200 watts of power! They also work great in aircraft needing a high Kv motor such as pylon racers and hotliners. These motors are designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics.

All Scorpion HK-40mm series motors come with 4mm male Bullet style connectors already attached, and include a hardware package that contains 3 matching female Bullet connectors for your speed controller with matching heat shink tubing. The motors feature an 8mm motor shaft that is ground down at the output end to 5mm (HK-4020 and HK-4025) or 6mm (HK-4035). Since the HK series motors are primarily designed for Helicopter and Ducted Fan use, they do not include a prop adapter. If you intend running a prop on this motor, you will need to purchase a prop adapter for a 6mm shaft; 40mm motor mounts are available here. Read more about Scorpion Motors. Keep your bearings in top condition with the Scorpion motor lubrication kit.

	HK 4020 Overview: 3 winds are available for this 40mm x 20mm motor: Motor Kv Imax Pmax HK-4020-910: 910Kv 65A 1820W   HK-4020-1100: 1100Kv 78A 1640W   HK-4020-1390: 1390Kv 90A 1890W   Specification:   HK-4020-910 HK-4020-1100 HK-4020-1390 Stator Diameter 40 mm 40 mm 40 mm Stator Thickness 20 mm 20 mm 20 mm No. of Stator Arms 12 12 12 No. of Magnet Poles 8 8 8 Motor Wind 10 Turn Delta 8 Turn Delta 6 Turn Delta Motor Wire 24-Strand 0.25mm 23-Strand 0.25mm 28-Strand 0.29mm Motor Kv 910 RPM / Volt 1100 RPM / Volt 1390 RPM / Volt No-Load Current (Io) 1.95 Amps @ 10 volts Amps 2.45 Amps @ 10 volts Amps 3.45 Amps @ 10 volts Amps Motor Resistance (Rm) 0.015 Ohms 0.010 Ohms 0.007 Ohms Max Continuous Current 65 Amps 78 Amps 90 Amps Max Continuous Power 1820 Watts 1640 Watts 1890 Watts Weight 284 grams 286 grams 284 grams Outside Diameter 48.9 mm 48.9 mm 48.9 mm Shaft Diameter 5 mm 5 mm 5 mm Body Length 46.5 mm 46.5 mm 46.5 mm Overall Shaft Length 88 mm 88 mm 88 mm Select wind: HK-4020-1100 (1100Kv) £60.43 HK-4020-1390 (1390Kv) £60.43 HK-4020-910 (910Kv) £60.43
	HK 4025 Overview: 3 winds are available for this 40mm x 25mm motor: Motor Kv Imax Pmax HK-4025-630: 630Kv 60A 2520W   HK-4025-740: 740Kv 70A 2450W   HK-4025-890: 890Kv 85A 2380W   Specification:   HK-4025-630 HK-4025-740 HK-4025-890 Stator Diameter 40 mm 40 mm 40 mm Stator Thickness 25 mm 25 mm 25 mm No. of Stator Arms 12 12 12 No. of Magnet Poles 8 8 8 Motor Wind 12 Turn Delta 10 Turn Delta 8 Turn Delta Motor Wire 20-Strand 0.25mm 24-Strand 0.25mm 23-Strand 0.29mm Motor Kv 630 RPM / Volt 740 RPM / Volt 890 RPM / Volt No-Load Current (Io) 1.10 Amps @ 8.4 volts Amps 1.33 Amps @ 8.4 volts Amps 1.80 Amps @ 8.4 volts Amps Motor Resistance (Rm) 0.024 Ohms 0.017 Ohms 0.013 Ohms Max Continuous Current 60 Amps 70 Amps 85 Amps Max Continuous Power 2520 Watts 2450 Watts 2380 Watts Weight 326 grams 326 grams 326 grams Outside Diameter 48.9 mm 48.9 mm 48.9 mm Shaft Diameter 5 mm 5 mm 5 mm Body Length 51.4 mm 51.4 mm 51.4 mm Overall Shaft Length 77 mm 77 mm 77 mm Select wind: HK-4025-630 (630Kv) £68.46 HK-4025-740 (740Kv) £68.46 HK-4025-890 (890Kv) £68.46
	HK 4035 Overview: 3 winds are available for this 40mm x 35mm motor: Motor Kv Imax Pmax HK-4035-500: 500Kv 84A 3500W   HK-4035-560: 560Kv 100A 4200W   HK-4035-630: 630Kv 120A 4200W
Tech Drawing: Specification:   HK-4035-500 HK-4035-560 HK-4035-630 Stator Diameter 40 mm 40 mm 40 mm Stator Thickness 35 mm 35 mm 35 mm No. of Stator Arms 12 12 12 No. of Magnet Poles 10 10 8 Motor Wind 10 Turn Delta 8 Turn Delta 6 Turn Delta Motor Wire 26-Strand 0.25mm 26-Strand 0.29mm 30-Strand 0.29mm Motor Kv 500 RPM / Volt 560 RPM / Volt 630 RPM / Volt No-Load Current (Io) 1.90 Amps @ 8.4 volts Amps 1.74 Amps @ 8.4 volts Amps 1.90 Amps @ 8.4 volts Amps Motor Resistance (Rm) 0.020 Ohms 0.012 Ohms 0.012 Ohms Max Continuous Current 84 Amps 100 Amps 120 Amps Max Continuous Power 3500 Watts 4200 Watts 4200 Watts Weight 399 grams 430 grams 430 grams Outside Diameter 48.9 mm 48.9 mm 48.9 mm Shaft Diameter 6 mm 6 mm 6 mm Body Length 48.4 mm 48.4 mm 48.4 mm Overall Shaft Length 74.2 mm 74.2 mm 74.2 mm Select wind: HK-4035-500 (500Kv) £110.55 HK-4035-560 (560Kv) £103.70 HK-4035-630 (630Kv) £103.70