Electric Flight in Australia


Scorpion 4020-8 outrunner motor

How to Order

 Peter Pine

PO Box 324
Pottsville Beach 2489
Phone (02) 6676 1437
Mobile (0407) 732 440

E-mail: ppine@northnet.com.au

Back to Scorpion Motors Page
Motor Specifications
Io = 3.5A at 21V
Kv = 790 rpm/volt
R = 0.011 Ohms
Length = 41.2mm
Diameter = 48.7mm
Weight = 304g
Continuous current accepted = 95A
Maximum continuous power = 1500W
Shaft = 6mm carbonised steel (protrudes both ends)
Collet-type prop adaptor and back-mount supplied

Motor fixing = four 4mm bolts supplied
Male 4mm bullet connectors fitted to motor
Recomm. controller = Hifei 120A SBEC or 100OPTO
An LRK (outrunner) brushless motor for R/C aircraft up to 8.0 kg powered by 12-18 cells or 4-5S LiPo; suitable for cabin models, scale models, aerobatic models and gliders - this motor can easily replace .90 two stroke engines. No gearbox is required because of the high torque of this motor type.

All Scorpion 4000 series motors have 3 ball bearings to support the rotating housing.

This is one gutsy motor - capable of high amps and great power output up to 1500W!

The S40 series of motors from Scorpion all have 40mm diameter stators - there are 12 stator arms and 14 magnets in the rotor housing. The stator is 20mm long in this 4020 version. The motor wind is a 8 turn delta wind with 29 strand 0.25mm wire.

Prop for 4S - 16x8"
Prop for 5S - 14x8"

Motor timing - 5 degrees - Drive frequency 8 kHz

Motor guaranteed for two years

Price = $169

Some power recommendations
Prop Prop type Volts Cells Revs per minute Amps Watts In Thrust Grams Recommended controller
Click here to see the full range of Scorpion 4000 motors.