Scorpion SII-3020-780 Brushless Motor, Kv=780

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Scorpion SII-3020-780 Brushless Airplane Motor

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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. The new SII series motors are an updated and improved version of the popular 30mm motors that have been so successful. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Plated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are hand-wound with wire that is rated at 180 degrees C (356 F). The high temperature magnets used in Scorpion Motors are designed to give top performance in the most demanding applications. The design improvements include:

1. New cooling fan design that works equally well in either direction of rotation.
2. New stator design to concentrate the magnetic fields at the pole faces.
3. New stator plate alloy to increase efficiency and reduce heat losses.
4. New flux ring alloy to contain more of the magnetic field within the motor.
5. The higher efficiency of the motor naturally lowers the Kv of the motor, so to get the Kv back up, fewer turns of heavier gauge wire are used. This lowers the internal resistance (Rm) of the motor and increases the current handling ability.

All Scorpion SII-30mm motors come with 3.5mm male Bullet style connectors already attached, and include a complete hardware package that contains the following: 3 matching female bullet connectors for your speed controller, 3 pieces of heat-shrink tubing, a cross style backplate mount with 4 screws, and a threaded shaft prop adapter.

Click here for the Scorpion SII-3020-780 Propeller Data Chart

Scorpion SII-3020-780 Motor Specifications
 Stator Diameter 30.0 mm (1.181 in)
 Stator Thickness 20.0 mm (0.787 in)
 Number of Stator Slots 12
 Number of Magnet Poles 14
 Motor Wind 12 Turn Delta
 Motor Kv Value 780 RPM per Volt
 No Load Current (Io) 1.21 Amps @ 10 Volts
 Motor Resistance (Rm) per Phase 0.045 Ohms
 Motor Resistance (Rm) Phase to Phase 0.030 Ohms
 Maximum Continuous Current 40 Amps
 Max Continuous Power (3-cell Li-Po) 440 Watts
 Max Continuous Power (4-cell Li-Po) 590 Watts
 Max Continuous Power (5-cell Li-Po) 740 Watts
 Motor Weight 166 grams (5.81 oz.)
 Outside Diameter 37.5 mm (1.476 in.)
 Shaft Diameter 5.00 mm (0.197 in.)
 Motor Body Length 45.7 mm (1.799 in.)
 Overall Shaft Length 74.5 mm (2.933 in.)

Click here for a PDF CAD drawing the Scorpion SII-3020-780 Motor

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