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Micron R/C is now focussing on micro and indoor models. The web site pages will soon change to reflect this and make it easier to compare kits and R/C components. We are having a sale of all products which do not fit within the new product range and these are available, while stocks last, at discounted prices.

Home > Scorpion Systems > HK 40mm Series
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Scorpion Brushless Motors HK 40mm Series

Print version

Select Motor Size: HK-4020 | HK-4025 | HK-4035 | Turbax Fan E-Conversion Kit

Items listed on this page are now available at reduced prices on the Sale Page. The 'Add to Cart' buttons for all Sale items have been disabled.

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. To help you select the correct motor for your helicopter, Lucien at Innov8tive Designs has written a Helicopter Motor Application Guide.

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. Spare shafts, and bearings are available. Keep your bearings in top condition with the Scorpion motor lubrication kit.


Click on image for a larger version.
 Scorpion HK-4020
(Top | HK-4025 | HK-4035 | Turbax Fan E-Conversion Kit)

3 winds are available for this 40mm x 20mm motor:

MotorKvImaxPmax
HK-4020-910:910Kv65A1820W 
HK-4020-1100:1100Kv78A1640W 
HK-4020-1390:1390Kv90A1890W 

Suitable 5mm shaft mod 0.6 pinions are available here.


£ 72.00 Select wind:

Click on image for a larger version.
 Scorpion HK-4025
(Top | HK-4020 | HK-4035 | Turbax Fan E-Conversion Kit)

5 winds are available for this 40mm x 25mm motor:

MotorKvImaxPmax
HK-4025-550:550Kv65A2850W 
HK-4025-630:630Kv60A2520W 
HK-4025-740:740Kv70A2450W 
HK-4025-890:890Kv85A2380W 
HK-4025-1100:1100Kv100A2200W 

Suitable 5mm shaft mod 0.6 pinions are available here.


£ 96.00 Select wind:

Click on image for a larger version.
 Scorpion HK-4035
(Top | HK-4020 | HK-4025 | Turbax Fan E-Conversion Kit)

5 winds are available for this 40mm x 35mm motor:

MotorKvImaxPmax
HK-4035-400:400Kv78A3400W 
HK-4035-500:500Kv84A3500W 
HK-4035-530:530Kv80A3400W 
HK-4035-560:560Kv100A4200W 
HK-4035-630:630Kv120A4200W 
HK-4035-800:800Kv100A4200W 

The HK-4035-500 and HK-4035-560 motors are available with M4 mounting holes instead of the normal M3.


£ 129.60 Select wind:

This product is on sale on this page


Click on image for a larger version.
 Scorpion Turbax Fan E-Conversion Kit with HK4035-800
(Top | HK-4020 | HK-4025 | HK-4035)

Electric powered ducted fan models are becoming very common now, and for many years, the Turbax Fan has been a very popular model for powering a variety of jet kits. Due to the fact that there are many models already built that contain Turbax fans, as well as many other models that can use this power system, Scorpion has developed an Electric Conversion Kit for this fan unit. The Turbax Electric Conversion Kit consists of a custom version of the Scorpion HK-4035-800 motor, connected to a CNC machined aluminum Motor Mount and Stator Vane support. This assembly is designed to be a direct bolt in replacement for the stock glow engine motor mount, and allows for easy conversion of either new or existing power systems from Glow to Electric power.

The special version of the HK-4035-800 motor includes an extended 8mm motor shaft that is precision ground to a 5mm diameter at the end, to mate up with the stock Turbax Fan Impeller. The CNC machined Stator Vane Support has 6 pockets around the perimeter with threaded holes to allow the stock stator vanes to be bolted in place with no modifications. Once installed, this powerful Electric Conversion Kit can provide up to double the thrust, compared to the stock glow set-up with a .46 size engine, and can breathe new life into existing models that were a bit underpowered with the stock glow motor power systems.

With the stock 5-blade Turbax impeller fan, the Scorpion Electric Conversion Kit can be run on either 10 or 12 Li-Po cells, depending on the desired power output level. Running on 10 Li-Po cells, 35 volts under load, the motor will pull 75 amps for 2625 watts of power, and will produce 4200 grams of thrust (9.3 pounds) at approximately 25,500 RPM. Running on 12 Li-Po cells, 42 volts under load, the motor will pull 105 amps for 4410 watts of power, and will produce 5900 grams of thrust (13.0 pounds) at approximately 30,000 RPM.


£ 153.00

This product is on sale on this page


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