Electric Flight in Australia


Scorpion SII-4020-540 outrunner motor

How to Order

 Peter Pine

1/40 Kellehers Road
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 = 1.92A at 21V
Kv = 542 rpm/volt
R = 0.020 Ohms
Length = 41.2mm
Diameter = 48.7mm
Weight = 304g
Continuous current accepted = 85A
Maximum continuous power = 1850W
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
Recommended controller = Hifei ESC
An LRK (outrunner) brushless motor for R/C aircraft up to 8.0 kg powered by 12-18 cells or 4-6S 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 12 turn delta wind with 22 strand 0.25mm wire.

Prop for 4S - 18x12"
Prop for 5S - 16x10"
Prop for 6S - 14x10"

Motor guaranteed for two years

Price = $249

Some power recommendations
Prop Prop type Volts Cells Revs per minute Amps Watts In Thrust Grams Recommended controller
12x8 APC-E 17.9 5S 8358 30 535
12x10 APC-E 17.4 5S 8004 33.6 585
13x8 APC-E 17.5 5S 8064 33 579
14x8.5 APC-E 16.6 5S 7518 38.3 638
Motors that compare to the Scorpion 4020-12:
Atlas 4020/12, 650 KV
Axi 4120/14, 669 KV
Dualsky XM5050CA-8, 575 KV
Hacker A40-12S, 610 KV
Himax HC5018-530
Hyperion Z4020-12, 660 KV
HXT 50-55B, 700 KV
Rimfire 50-55-650
Torque 4014-T570

Watch for prop data on this new motor - coming soon!

Click here to see the full range of Scorpion 4000 motors.