Electric Flight in Australia

Scorpion 4025-12 outrunner motor

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Peter Pine

PO Box 1050
Kingscliff 2487
Phone (02) 6674 0397
Fax (02) 6674 2037

E-mail: ppine@northnet.com.au

Back to Scorpion Motors Page

Motor Specifications
Io = 1.80A at 21V
Kv = 440 rpm/volt
R = 0.022 Ohms
Length = 46.2mm
Diameter = 48.7mm
Weight = 347g
Continuous current accepted = 85A
Maximum continuous power = 2000W
Shaft = 6mm carbonised steel (protrudes both ends)
Collet-type prop adaptor and back-mount supplied
Motor fixing = four 4mm bolts supplied
Connectors not fitted to this size
Recommended controller = Scorpion 110A

An LRK (outrunner) brushless motor for R/C aircraft up to 10.0 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 25mm long in this 4025 version. The motor wind is a 12 turn delta wind with 22 strand 0.25mm wire.

Prop for 4S - 20x13"
Prop for 5S - 18x12"
Prop for 6S - 17x10"

Motor guaranteed for two years

New super-low price posted 18-5-08! Price now = $125

Some power recommendations
Prop	Prop type	Volts	Cells	Revs per minute	Amps	Watts In	Thrust Grams	Recommended controller

Motors that compare to the Scorpion 4025-10:
Atlas 4030/12, 420 KV
Axi 4130/16, 385 KV
Dualsky XM5060CA-9, 345 KV
Hacker A40-12L, 410 KV
Himax HC5030-390
Hyperion 4025-12, 486 KV
HXT 50-65A, 400 KV

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

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