From 2010 when Scorpion HKIII-40 series is released, a lot of feedback by World Champions and pilots in all facets of the hobby are received that they have well established themselves as the Gold Standard of R/C model power!

The HKIII-4025 series motors have proven themselves to be extremely successful in heli community and has become the most popular motor used in 500~600 class helicopters world-wide.

And now we are pleased to announce the release of the fourth generation HKIV-4025 series motors. With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Specifications

• Stator Diameter    40 mm(1.57 in)
• Stator Thickness    25 mm(0.98 in)
• No. of Stator Arms    12
• Magnet Poles    10
• Motor Wind    3+3 Turn Delta
• Motor Wire    1-Strand 1.7 mm
• Motor Kv    1100KV RPM/Volt
• No-Load Current (IO/10v)    5.29 Amps
• Motor Resistance (RM)    0.006 Ohms
• Max Continuous Current    100 Amp
• Max Continuous Power    2220 Watt
• Weight    347 Grams (10.58 oz)
• Outside Diameter    49.50 mm (1.95 in)
• Shaft Diameter    5.98 mm (0.24 in)
• Body Length    54 mm (2.13 in)
• Overall Shaft Length    89.9 mm (3.54 in)
• Max Lipo Cell    6s
• Peak Continuous Current    130 Amps (5 seconds)
• Peak Continuous Power    2886 Watts (5 seconds)
• Motor Timing    5deg
• Drive Frequency    8kHz

Included in the Box

• 1 x Scorpion HKIV-4025-1100KV Motor
• 3 x Female Connectors
• 3 x Connector Cover
• 4 x M3 Screws 
• 4 x M4 Screws

Weight including packaging

• 744g