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BMS-1904, HV-DIGITAL, HIGH TORQUE, ULTRA HIGH SPEED, CORELESS (22.6kg / 313.9oz .035/sec 8.4V) (Heli Series)

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Description

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BMS-1904, HV-DIGITAL, HIGH TORQUE, ULTRA HIGH SPEED, CORELESS (22.6kg / 313.9oz .035/sec 8.4V) (Heli Series)

Application / Suitable

Priority for Helicopter tail [ Rudder ] & 1/10th On-Road, Drift Car.  (EP / Gas / Nitro)

 

Specifications

Torque At 6.0V	16.3 kg-cm / 226.4 oz-in
Torque At 7.4V	19.8 kg-cm / 275.0 oz-in
Torque At 8.4V	22.6 kg-cm / 313.9 oz-in
Speed At 6.0V	0.058 sec / 60°
Speed At 7.4V	0.046 sec / 60°
Speed At 8.4V	0.035 sec / 60°

 

Protection Mechanism

Soft Start Protection	Soft start to a neutral position.
Over Voltage Protection	Over 9.0V drive the protection mode and 8.4V return to normal mode.
Low Voltage Protection	Lower than 4.0V, drive the protection mode and 4.5V return to normal mode.
Locked Rotor Protection	Stall in 5 sec, output torque goes down.
Temperature Protection	Overheat 85 degrees C (185 degrees F), drive the protection mode and down 75 degrees C (167 degrees F) return to normal mode.
Lose Control Protection	When 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 System	Digital Controller / AD 12-Bits Resolution ( 4096 Steps ) Frequency：Up to 333Hz / Neutral：1500us or 1520us
Dead Band Width	0.001ms ( Default：1us)

 

Mechanical Specifications

Ball Bearing	Dual ball bearings
Gear	All Steel w/ Nanometer Alloy Gears
Motor	High Premium Coreless Motor
Horn / Gear Spline	25 Teeth ( Same as F-Type )

 

Physical Specifications

Dimension (mm)	40.5 x 20 x 39 mm / 1.59 x 0.79 x 1.54 in
Weight (gram)	66.0 ± 1 grams / 2.33 oz
Product Picture / Dimension Sketch	​