Do you need more power for your 700 – 800 class helicopter? Then, check this new motor from Scorpion . . . . introducing the HK-4540 Signature Edition.

Continue through to get the details for this exclusively “Made to order” motor direct from the Scorpion website.

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Another Milestone in High Performance Power System – HK-4540 Signature Edition

Scorpion is proud to unveil the forthcoming release of the new Scorpion HK-4540 Signature Edition, it proved a big step forward for the power system of electric RC helicopter. This motor achieves a very high level of power performance, can supply higher than 10kW continuous power with only weight of around 725 grams.

To bring your helicopter to an unprecedented level of performance and flying pleasure. HK-4540 Signature Edition would be your best choice . For more powerful, let’s embrace it!

This motor is supplied as “Mark to Order” and only limited to 50 pieces. The leading time is six weeks after you place the order, and only available at our official website at (

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Scorpion HK-4540 Motor – SIGNATURE>/strong>

Winding option:
4T+3T x 1.8mm YY
4T+4T x 1.7mm YY
5T+4T x 1.6mm YY
5T+5T x 1.5mm YY
6T+5T x 1.4mm YY
6T+6T x 1.4mm YY

Optional accessories: Connector Kits / C-Clip Kits / HK-45 series

Exclusively available @

Scorpion HK-4540* Series motor is supplied as “Mark to Order”. We offer six different winding options to provide the best fit for your own flying style and setup. The motor weights about 700-725gram, with a broad range of KV (from 315 to 580), and allow to use from 12S to 18S Lipo setup for either 700 or 800 class helicopter. The Scorpion HK-4540* Series motor is capable of running continuously at around 10kW input power and can handle peak inputs of 15kW for 2 seconds. All Scorpion HK-4540* Series motor will be wound in Germany, and only 50pcs in total are available. Below is the table of Winding vs KV (Rpm/V)

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

*This motor is using 30mm bolt spacing on the mounting with M4 Screw holes

HK Patent No. : HK1141674

China Patent No. : ZL2010 2 0298704.9

Taiwan Patent no. : M399539

All Others Worldwide Patent : Pending


Stator Diameter: 45 mm (1.77 in)
Stator Thickness: 40 mm (1.57 in)
No. of Stator Arms: 12
No. of Stator Poles: 10
Motor Kv: 315~580 RPM / Volt
Max Continuous Power: 10000 Watts
Max Continuous Current: >150Amps
Weight: 700~725 Grams
Outside Diameter: 56.7 mm (2.23 in)
Shaft Diameter: 5.98 mm (0.23 in)
Body Length: 72 mm (2.83 in)
Overall Shaft Length: 111 mm (4.37 in)
Max Lipo Cell: 12s~18s
Max Peak Power: 15k Watts (2 seconds)
Max Peak Current: Unknown due to ESC Limitation

Weight including packaging


Source: Scorpion Power System

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