Scorpion HKIII-5025-520 Brushless Motor, F3S Edition, Kv=520

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Scorpion HKIII-5025-520 Brushless Motor, Kv=520

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The Scorpion HKIII-5025-520 motor is designed from the ground up to meet the specific demands of F3S Helicopter Speed Cup Racing. This motor has a maximum continuous power rating of 7696 watts at 130 amps, and a peak power rating of 11,840 watts at 200 amps for 2 seconds! The larger diameter 50mm stator allows these motors to produce insane amounts of torque, and give you the power you need to blast through the timing gates and into the winners circle!

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 made with 0.20mm laminations to give maximum efficiency, and minimum Eddy current losses. 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 N-50EH style, which are rated for operation at 200 degrees C (392 F), 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!

Scorpion HKIII-5025-520Kv F3S Motor Specifications
Stator Diameter50.0 mm (1.97 in)
Stator Thickness25.0 mm (0.98 in)
Number of Stator Arms12
Number of Magnet Poles10
Motor Wind6+5 Turn 2Y
Motor Wire1-Strand 1.60mm
Motor Kv Value520 RPM per Volt
No Load Current @ 10v2.20 Amps
Motor Resistance (Rm) 0.009 Ohms
Maximum Continuous Current130 Amps
Max Continuous Power7,696 Watts
Motor Weight566 grams (19.96 oz.)
Outside Diameter61.5 mm (2.42 in.)
Shaft Diameter7.98 mm (0.314 in.)
Motor Body Length60.2 mm (2.37 in.)
Overall Shaft Length84.60 mm (3.33 in.)
Peak Current200A (2 seconds)
Peak Power11,840 Watts (5 seconds)
Max LiPo Cell16s
Motor Timing5deg
Drive Frequency8kHz

Weight including packaging



1 x Scorpion HKIIII-5025-520KV
4 x Female 6mm Bullet Connectors
4 x Screws

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