SCORPION HKII-4525-520KV ULTIME

Scorpion HKII-4525-520 KV - ULTIMATE

Some products

The second generation of the 4525 series (replaces the HK-4525-520)

The new HKII-4525-520KV ULTIMATE brushless motor is wound with a single

strand of 1.4mm wire for maximum efficiency.

This latest generation motor is capable of continuous operation with an input

power of 4450 watts at 100 amps and handles peak currents of 10200 watts

and 230 A (max. 2 seconds).

With the HKII-4525-520kV Ultimate we have once again raised the bar and

are redefining power for 700 helicopters!

Technical specifications:

scorpion-hkii-4525-520.jpg Stator diameter: 45 mm (1.77 in)

Stator thickness: 25 mm (0.98 in)

No. stator arms: 12

No. number of stator poles: 10

Motor wind: 5 + 6T YY

Motor wire: 1 strand of 1.4mm

Motor Kv: 520 KV rpm / volt

No-load current (Io / 10V): 1.81 amps

Motor Resistance (RM): 0.012 Ohms

Maximum continuous current: 100 amps

Maximum continuous power: 4450 watts

Weight: 526 grams (18.55 oz)

Outside Diameter: 56.9 mm (2.24 inches)

Shaft diameter: 5.98 mm (0.24 in)

Body Length: 57.7mm (2.27inch)

Total shaft length: 112 mm (4.41 inches)

Max Lipo Cell: 12s

Maximum peak current: 230 A (2 seconds)

Maximum peak power: 10,200 watts (2 seconds)

Engine timing: 5 deg to 15 deg

Drive frequency: 8kHz

The popular Limited Edition HK-4525-520kV Scorpion Motor has been

available since September 2010. The HK-4525 is the performance

benchmark for 700-class helicopters.

In April 2012, eighteen months later, Scorpion presented the enhanced

edition HK-4525 Ultimate to the public. This engine is one of

most popular engines in 700cc helicopter competitions around the world.

Many other manufacturers have tried to hold a spark plug to the engine,

but none have succeeded. Even Scorpion tried to improve the engine and

failed for a long time.

Now 5 years later, we are proud to present the HKII-4525-520kV Ultimate.

By improving the materials and design of the motor, we have succeeded

in improving the efficiency and energy conversion of electricity into

rotary motion.

The HKII offers a completely revised EM field design while maintaining

its high level of compatibility with all controllers on the market.

This new engine has more power reserves with higher efficiency for

your helicopter.

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