top of page

For the ultimate in tail control for you RC helicopters look no further than the BLS-18AN narrow band servo.



Application / Suitable

Only for Helicopter tail [ Rudder ]



Torque At 6.0V13.8 kg-cm / 191.7 oz-in
Torque At 7.4V17.1 kg-cm / 237.5 oz-in
Torque At 8.4V19.4 kg-cm / 269.5 oz-in
Speed At 6.0V0.045 sec / 60°
Speed At 7.4V0.038 sec / 60°
Speed At 8.4V0.033 sec / 60°


Protection Mechanism

Soft Start ProtectionSoft start to a neutral position.
Over Voltage ProtectionOver 9.0V drive the protection mode and 8.4V return to normal mode.
Low Voltage ProtectionLower than 4.0V, drive the protection mode and 4.5V return to normal mode.
Locked Rotor ProtectionStall in 5 sec, output torque goes down.
Temperature ProtectionOverheat 85 degrees C (185 degrees F), drive the protection mode and down 75 degrees C (167 degrees F) return to normal mode.
Lose Control ProtectionWhen losing the transmitter signal, that servo will be back to the neutral position immediately and lock.


Power Supply

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


Control Specification

Control SystemDigital Controller / AD 12-Bits Resolution ( 4096 Steps )
Frequency:333 or 560Hz / Neutral : 760us Narrow Band
Dead Band Width0.001ms ( Default:1us)


Mechanical Specifications

Ball BearingDual
GearTitanium W/ Nanometer Alloy Gears
MotorHigh Premium Brushless Motor
Horn / Gear Spline25 Teeth ( Same as F-Type )


Physical Specs

Dimension (mm)40.5 x 20 x 39 mm / 1.59 x 0.79 x 1.54 in
Weight (gram)76 ± 1 grams / 2.68 oz

BLS-18AN (760us / 560Hz)

    bottom of page