1. Added integral centrifugal blower fan for more efficient cooling
2. Flux ring is threaded to end housing for added stability
3. Different magnet profile for higher flux concentration
4. New stator profile for increased efficiency

10% more torque, 8% higher rpm, 15 degrees cooler, 12% higher efficiency

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. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized 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 wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are N-50EH style, which are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. For the best overall combination of quality, performance, and value, give Scorpion Motors a try!

All of the Scorpion brushless motors are built with angled cooling holes in the front housing that create a built-in fan.  The airflow generated by these holes is sufficient to cool the motor core during use.

The constants for the HK2221-8 motors are as follows:

Rm = 0.0241 Ohms
Io = 2.395 amps @ 10.5 volts
Kv = 3595
Weight = 76 grams, 2.68 ounces
Max Current = 45 amps for 1 minute
Shaft: 3.2mm
 

 

Scorpion Commander Series Brushless Speed Controllers represent one of the best values in the speed controller market today. From the beautiful gold anodized heatsinks, to the unique metal containers that the ESC's are shipped in, everything about Scorpion Speed Controllers shows the company's commitment to quality. These ESC's are manufactured from top quality components, in a state of the art manufacturing facility, and are designed to provide years of trouble free operation.

Unlike other ESC manufacturers, who require you to buy an add-on programming module to gain full functionality of the controller, Scorpion provides a full feature Programming Card with EVERY speed controller sold, at No Extra Charge! The adjustable parameters on every Scorpion ESC include: Battery Type, Cell Count, Low Voltage Cut-off Level, Power Cut-off Type, Current Overload Protection, Braking Level, Acceleration Time Delay, PWM Frequency Selection, Timing Advance and Motor Rotation.

Scorpion Speed Controllers also include all of the ESC parameters clearly labeled on the heatsink assembly. Voltage range, current rating, BEC rating, Ni-XX and Li-Po cell count and input polarity are all clearly marked to avoid any confusion. Scorpion Commander Series Speed Controllers are also backed by a 2 year manufacturers warranty against defects in materials and workmanship, so you can buy with confidence. For a total package of Quality, Performance and Value, use Scorpion Brushless Speed Controllers.

Specifications

Weight (Without Connectors) ................. 41.5 gm (1.46 oz)
Max Continuous Current ..................................... 45 Amps
Operating Voltage Range ............................... 6 to 15 Volts
Max BEC Output ...................................... 4 Amps @ 5.0 V
On Resistance .............................................. 2.33 mOhms
Size ....................... 75 x 30 x 9 mm (2.95 x 1.18 x 0.35 in)