More compact, lighter and with greater efficiency, Black Widow motors are premium motor systems incorporating both the motor and ESC into a single unit. This saves space, reduces overall weight of the model, reduces drag and allows the system to run cooler.

http://www.ztwoem.com

With the built in ESC you can also change the direction of rotation of these motors with a simple flick of a switch and there is also a USB compatible flashport at the base of the unit that will allow you to update the firmware.

These crisp looking units have been manufactured to exacting standards and use original NMB bearings to ensure the smoothest running and reliability of the motor. Quality mounting accessories are of course included and multiple mounting holes cater for most multi-rotor frames currently on the market.

If you are into FPV racing and want motors with real bite in performance then its hard to go past the Black Widow Series.

Features:
• All in one motor with built-in ESC
• Built-in reversing switch
• Built-in flashing port for firmware upgrades
• Fast throttle response
• High efficiency
• CNC case for durability
• 0.2mm thickness silicon steel sheet used for stator which creates low current loss
• NMB bearings for durability and smooth running
• NdFeB high temperature rated magnets for trouble free operation
• Dynamically balanced
• Compact and lightweight
• Low internal resistance
• All in one unit keeps wiring neat and tidy

Specs:

Motor: Black Widow 4108-320Kv
ESC: 40A (continuous current)
Motor Resistance: 0.27Ω
ESC Resistance: 0.002Ω
Input Voltage: 3~6S (11.1~22.2V)
Idle Current: 0.1A
Max Watts: 350W
Structure: 24N22P
Stator Size: 40.6 x 8mm
Rotor Diameter: 47mm
Shaft Diameter: 4mm
BEC: None
Servo Plug: JR type
Servo Lead Length: 600mm
Power Cable Length: 600mm
Weight: 196g
Recommended Props: 13~16ins

Included:
1 x Black Widow 4108-320KvMotor/ESC Combo
1 x CW propeller driver
1 x CCW propeller driver
1 x Screw set
1 x User manual