Novak SS Pro Brushless Motor (21.5T)
[NOV3421]

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Based on Novak’s Velociti-Series Racing brushless motors, Novak is pleased to announce its SS Pro-Series racing brushless motors. The SS21.5 Pro Brushless Motor is 21.5 turns and is the slowest motor in the SS Pro Series. It was specifically designed to offer oval and beginning drivers an even slower option, which makes it ideal for extended run times. When using a 2S Li-Po pack, the SS21.5 Pro brushless motor can match the speed of the Novak SS10.5 Pro brushless motor on a 4-cell Ni-MH pack.

A standard feature of the SS Pro Series, is the set of ribbed aluminum end bells. The lightweight aluminum end bells not only reduces the overall weight of the motor, but the ribbed design also acts as a heat sink by efficiently removing excessive heat from the motor.

The SS Pro brushless motors are equipped with all of the great standard features found on all Novak motors, including: a convenient Solder Tab System for easy wire replacement; Sensor-Based Technology for excellent starting torque, low-speed drivability, and smooth acceleration; the same Oversized Front Bearing used in Novak’s Velociti-series motors that is more rugged, extra durable, and helps extend motor life; and Thermal Overload Protection (when used with a Novak brushless ESC) that allows pack after pack to be run without fear of damaging the motor, battery, or speed control.

Of its many features, its sensor-based design allows for most of the motor's important benefits, including the following:

No Cogging
Thanks to constantly knowing the rotor position, the motor provides instantaneous throttle response & smooth transitions from neutral to drive. The rotor position knowledge is attained due to the ESC & motor being continuously synchronized via the motor harness.

Smooth & Controlled Low Speed Driveability
Always knowing the rotor angle is key to smooth acceleration without delivering abrupt and uncontrolled bursts of power.

Strong/Consistent Brakes & Starting Torque
Rotor position knowledge results in consistent starts & stops, without hesitation or inconsistent lag times before acceleration or braking--this translates to consistant lap times.

Thermal Protection
Position & temperature sensors inside motor provide unparalleled thermal protection, letting you to run pack after pack without worrying about overheating the motor, ESC, or magnets.

All Novak brushless motors are designed by Novak in Irvine, Calif. Each motor is factory hand-wound and is put through rigorous testing, including a final dyno test to ensure that each motor meets Novak’s rigid specifications.

ESC Compatibility:
The SS Pro Brushless Motors are compatible with all Novak brushless ESCs, including:

• XBR Sport Brushless/Brush Speed Control
• GTB Spread Spectrum Brushless/Brush ESC
• GTB Programmable Brushless/Brush ESC
• GTB 4-Cell Programmable Brushless/Brush ESC
• GTB 4-Cell Spread Spectrum Brushless/Brush ESC

• Sensor-based for excellent braking and low-speed driveability
• High-performance Nickel-plated Sintered Neodymium rotor (ROAR-Approved!) for maximum motor acceleration, braking power and performance in high-temperature conditions
• Oversized front bearing for increased load handling and bearing life
• Lightweight ribbed aluminum end bells
• Provides approximately 20% longer run-times compared to brushed motors
• Specifically designed for R/C vehicles
• Direct-Solder Wiring Tabs for flexible soldering options
• Minimal maintenance
• User-replaceable rotor (#5908) and Novak 13 mm tuning rotor (#5909), front end bell/bearing, and rear bearing (#5919)
• Thermal Overload Protection (when used with a Novak brushless ESC)
• No cogging
• Factory hand-wound and race-tuned by Novak in Irvine, Calif.
• Meets all ROAR specifications