The latest edition of the BLS-H51B is bringing several improvements to inlcude upgraded bearing and drivetrain as well as increased torque and speed. The BLS-H51B V2 is everything you would expect from Blue Bird Servo. Monster Torque, Fast and buttery smooth. This high-voltage beast will not disapoint.


Helical Gears for supreme strength and precision.


  • Soft Start Protection
  • Over Voltage Protection
  • Low Voltage Protection
  • Locked Rotor Protection 
  • Temperature Protection
  • Includes Aluminum Servo Arm



Awesome for 3D Airplane, Jet & 1/5 or 1/8th Monster / Crawler / Off-road




Torque At 6.0V   46.2 kg-cm / 641.7 oz-in
Torque At 7.4V   55.7 kg-cm / 773.6 oz-in
Torque At 8.4V   62.9 kg-cm / 873.6 oz-in
Speed At 6.0V   0.12 sec / 60°
Speed At 7.4V   0.10 sec / 60°
Speed At 8.4V   0.09 sec / 60°



Power Supply

Operating Voltage


4.5V ~ 8.5V ( 4 ~ 6 Cell Ni-MH or 2S Li-Poly / 2S Li-Fe)


Control Specifications 

Control System    Digital Controller / AD 12-Bits Resolution ( 4096 Steps )
   Frequency:333Hz / Neutral:1520us
Dead Band Width    0.001ms ( Default:1us)


Mechanical Specifications

Ball Bearing    Dual, Steel
Gear    All Steel Alloy Metal Helical Gears
Outside Case    Full One-Piece Aluminum CNC Casing
Motor    High-Efficiency Japan Brushless Motor
Horn / Gear Spline    25 Teeth ( Same as F-Type )

BLS-H51B V2 Helical Gear Brushless Servo

$129.99 Regular Price
$115.99Sale Price