(SP-HKII-4525-520-ULT) Scorpion HK-4525-520KV Ultimate

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 the highest efficiency possible.

This latest generation motor is capable of running continuously at 4450 watts input at 100 amps and handles peak currents of 10200 watts and 230 amps (2 sec max).

The popular Scorpion HK-4525-520kV Limited Edition motor has been available since September 2010. The HK-4525 is the reference in terms of power for 700 class helicopters. In April 2012, eighteen months later, Scorpion introduces the improved HK-4525 Ultimate Edition to the public. This engine is one of the most popular

engines in competitions for 700cc helicopters worldwide. Many other manufacturers have tried to match 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.

Through improvements to the materials and motor design, we were able to improve the efficiency and energy conversion of the current into rotary motion. The HKII offers a completely revised EM field design while still maintaining its high compatibility with all controllers on the market. This new motor has more power reserves with higher efficiency for your helicopter.

Technical data

Stator diameter: 45 mm (1.77 in)

Stator thickness: 25 mm (0.98 in)

Stator arms: 12

Poles: 10

Windings: 5+6T YY

Wire: 1 strand 1.4 mm

RPM/V: 520KV RPM/Volt

No load(Io/10V): 1.81A

Resistance(RM): 0.012Ohm

Power rating: 100A (230A max for 2sec.)

Power: 4450 Watt (10200 Watt max for 2sec)

Weight: 526g

Diameter: 56,9mm

Shaft: 5,98mm

Motor length: 57,7mm

Shaft length: 112mm

Max. Lipo cells: 12s

Max power (peaks): 230A (2 seconds)

Max power(peaks): 10200 Watts (2 seconds)

Motor Timing: 5-15

Motor Frequency: 8kHz