*******Available for preorder and an introductory special price of $159.99 with delivery expected at the end of March 2021. The demand is already high so get your order in now to get yours for the upcoming season.*********


There is a new king of all servos in town. Introducting the formitble Bluebird BLS-H71B! This BEAST makes nearly 1000oz-in at 7.4 volts making it a class leader in both performance and value. We learned from the success had with the BLS-H51B and BLS-M52B and put those models on steroids to make this new servo posible. 

The BLS-H71B 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 all giant scale 3D Airplane, Jet & 1/5 or 1/8th Monster / Crawler / Off-road




Torque At 6.0V   56.2 kg-cm / 780.6 oz-in
Torque At 7.4V   66.7 kg-cm / 926.5 oz-in
Torque At 8.4V   73.2 kg-cm / 1016.7 oz-in
Speed At 6.0V   0.12 sec / 60°
Speed At 7.4V   0.10 sec / 60°
Speed At 8.4V   0.08 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 Stainless Steel  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 )



40.5 x 21 x 42.9 mm / 1.59 x 0.83 x 1.69 inches.



92.0 +/- 1 grams / 3.24 oz.

BLS-H71B Helical Gear Brushless Servo

$168.99 Regular Price
$159.99Sale Price