Scorpion SII-5525-210KV

$ 379.99
Motor Available for Special Order only. Email for order inquiry.
Optional accessories: 12S Tribunus SBEC series

Product Description

Scorpion SII-55 series is the second generation of high efficiency electric motor from Scorpion that are widely used in the size of 30cc to 50cc airplane, with proven technology in new magnet configuration and housing design to provide higher efficiency, higher power, less eddy current losses with lower internal resistance than our previous S-55 series.

Scorpion starts with premium material 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 by top grade 0.35mm 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 custom manufactured to be able to withstand high temperatures.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship.


HK Design Patent No. : 1201208.6

CN Design Patent No. : 201230267986.0

Taiwan Design Patent No.: 101303643

All other worldwide Patent: Pending


Suggestion :

This motor is perfect for any 30-40cc airframes, or aerobatic airplanes with Wingspan of 73-78" running on 10s batteries.


Recommended set up :

SII-5525-210kv - 10s, 35cc Gas Equivalent

ESC = Tribunus 12-130A

Batteries - 10s 4000-5000mah

Propellers - 21x10E , 22x10E


Flight Demo:

Scorpion SII-5525-210KV


Stator Diameter 55mm (2.165 in)
Stator Thickness 25mm (0.984 in)
No. of Stator Arms 12
Magnet Poles 14
Motor Wind 17 Turn Delta
Motor Wire 18-Strand 0.33mm
Motor Kv 210 RPM / Volt
No-Load Current (Io/10V) 1.11 Amps
Motor Resistance (Rm) 0.026 Ohms
Max Continuous Current 90 Amps
Max Continuous Power 3150 Watts
Weight 708 Grams (22.98 oz)
Outside Diameter 66.4 mm (2.614 in)
Shaft Diameter 7.98 mm (0.314 in)
Thread size M8*1.0
Body Length 59.82 mm (2.355 in)
Overall Shaft Length 106 mm (4.173 in)
Max Peak Current 135 Amps
Max Peak Power 4700 Watts
Max Lipo Cell 10s
Motor Timing 5deg
Drive Frequency 8kHz

Included in the Box

1x Scorpion SII-5525-210Kv Motor
3x Female Connectors
3x Heat Shrink
1x Cross Motor Mount
4x Screw
1x Thrust washer
1x tapered collar
1x spacer collar
1x Prop washer
1x Prop nut
2x Nut lock

Weight including packaging


Data Chart

View Scorpion SII-5525-210KV Data Chart

Full Dimension

View Scorpion SII-5525-210KV Full Dimension