Features:

High performance high voltage coreless digital servo

High torque and high speed

High-precision metal gears with hard anodising

Dual Bearing Support

Metal centre case to act as a heat sink

JR style lead and plug

25 tooth spline (Futaba style)

Waterproof

Overview

The MG5921HV is part of MacGregor's new range of high voltage digital servos. This high voltage, high torque servo has been designed for use with large scale & aerobatic aircraft.

Battery chemistries such as Li-Po, Li-Ion, and Li-Fe have become very popular within the RC community. They are the standard for powering electric motors and have also gained popularity as receiver battery packs. The issue is the output voltage of these batteries is higher then the previous standard 4 - and 5-cell NiCd and NiMH packs, 4.8V and 6V respectively. The higher voltage is not an issue with the receivers but can be for the servos. Many servos will not operate at these higher voltages for very long before burning out the motors or electronics.

To get around this issue modellers have had to use a regulator to drop the voltage to an acceptable operating range for their servos, usually around 5 to 6 volts. The addition of a regulator adds a component that, should it fail, can cause the loss of a model.

Specifications:

Dead band: 1µs

Working frequency: 1520µs / 330hz

Motor: Coreless Motor

Operating Speed (6.0V): 0.152sec/60°

Operating Speed (8.4V): 0.123sec/60°

Stall Torque (6.0V): 17.25 kg.cm (239.55oz/in)

Stall Torque (8.4V): 20.32 kg.cm (281.89 oz/in)

Dimensions: 40.5 x 20.5 x 36.5mm /1.59 x 0.80 x 1.43in

Weight: 59.3g (2.09oz)

Connector Wire Length: 265mm (10.43in)

Bearing: 2BB