Spektrum A179 Metal-Geared Digital Servo SPMSA179

The Spektrum A179 42g High-Voltage Metal-Geared Digital Servo - 375mm Lead (SPMSA179) is a mini digital servo for airplane applications. It uses a metal gear train and includes a bearing, with a 25-tooth spline count for servo arm installation. The 375mm lead stated in the product name provides the connection lead for installation in a suitable aircraft model.

This high-voltage servo operates across a 6.0 to 8.4V range. Its digital control system provides the stated speed and torque figures at different operating voltages, allowing these values to be compared when selecting a servo for an aircraft setup. The servo weighs 42g and is supplied as one A179 unit.

Specifications

• Application: Airplane
• Servo type: Digital
• Size category: Mini
• Gear type: Metal
• Operating voltage: 6.0–8.4V
• Weight: 42g
• Spline count: 25 tooth
• Speed: 0.08 sec/60° at 8.4V; 0.09 sec/60° at 7.4V; 0.11 sec/60° at 6.0V
• Torque: 170 oz-in (22kg-cm) at 8.4V; 150 oz-in (19kg-cm) at 7.4V; 110 oz-in (15kg-cm) at 6.0V

The metal-geared construction, mini size category and high-voltage operating range define the A179's intended specification. Check the voltage requirements of the receiver and aircraft electronics before installation, and use the 25-tooth spline standard when selecting compatible servo arms. Suggested compatibility is with airplane applications where the stated size, lead length, speed and torque figures match the model's requirements.