FrSky ACT S5415H Servo  High/Wide Voltage Super Torque Digital Metal Gear Servo

ARRIVING JUNE 5, 2026! Order Now!

FrSky ACT 5400 Series Coreless HV Servos – High-Speed Performance for Giant Scale RC Aircraft

FrSky S5415H Coreless HV Digital Servo | High-Torque Servo for 50cc–120cc Giant Scale RC Aircraft  

SKU 03050658

The FrSky S5415H Coreless HV Digital Servo is a premium high-torque servo designed for the largest and most demanding giant-scale RC aircraft. Engineered for exceptional holding power, precise centering, and long-term reliability, the S5415H is an ideal choice for 50cc- 100cc–120cc aerobatic aircraft, turbine jets, large-scale warbirds, and other high-performance RC airplanes requiring maximum control authority.

Featuring advanced coreless motor technology, a heavy-duty metal gear train, CNC-machined aluminum case, dual precision ball bearings, and high-voltage operation up to 8.4V, the FrSky S5415H delivers the strength and precision serious RC pilots demand when flying large aircraft with heavily loaded control surfaces.

Recommended Applications

• 50cc-100cc–120cc Giant Scale RC Airplanes
• Turbine Jets
• Large-Scale Warbirds
• Extreme 3D Aerobatic Aircraft
• IMAC Competition Aircraft
• Oversized Rudder Installations
• Large Elevator Applications
• High-Load Aileron Systems
• Aircraft Requiring Maximum Servo Torque

Key Features

Coreless Motor Technology

The FrSky S5415H utilizes a high-performance coreless motor that delivers rapid response, smooth operation, and excellent centering accuracy under demanding flight conditions.

Benefits Include:

• Exceptional torque output
• Fast and precise control response
• Smooth servo movement
• Reduced motor inertia
• Consistent performance under heavy aerodynamic loads

Precision Feedback System

A precision potentiometer feedback system provides accurate position tracking and repeatable servo movement for improved control precision throughout the flight envelope.

Integrated Soft Start Technology

The S5415H incorporates built-in Soft Start Technology, gradually moving the servo into position during power-up rather than instantly driving to center.

Soft Start Benefits:

• Reduces startup shock loads
• Protects gears and linkages
• Minimizes wear on control horns and hinges
• Enhances long-term reliability
• Helps extend component service life

Heavy-Duty Metal Gear Train

Designed for giant-scale aircraft, the all-metal gear train provides outstanding durability and strength when operating large, heavily loaded control surfaces.

CNC-Machined Aluminum Case

The fully CNC-machined aluminum housing provides maximum rigidity, superior heat dissipation, and excellent protection for internal components.

Dual Ball Bearing Support

Dual precision ball bearings support the output shaft for smooth operation, reduced friction, and increased durability.

High-Voltage Compatible

The FrSky S5415H operates from 4.8V to 8.4V, making it compatible with modern HV receiver battery systems and power distribution systems commonly used in giant-scale aircraft.

High-Speed Signal Processing

Featuring a 333Hz refresh rate, the S5415H delivers fast, accurate, and responsive servo performance for precision flying applications.

Standard 25T Output Spline

The standard 25T output spline is compatible with a wide variety of heavy-duty aluminum servo arms and giant-scale hardware.

Why Choose the FrSky S5415H?

Delivering up to 986 oz-in of torque at 8.4V, the FrSky S5415H is built for pilots who refuse to compromise on control authority. Whether installed in a giant-scale aerobatic aircraft, turbine-powered jet, or large-scale warbird, the S5415H provides the torque, durability, and precision needed to confidently command today's largest RC aircraft.

Performance Specifications by Model

Why Choose the FrSky S5415H Coreless HV Servo?

S5415H – Built for Maximum Control Authority

The FrSky S5415H Coreless HV Digital Servo is engineered for the largest and most demanding giant-scale RC aircraft. Delivering up to 986 oz-in of torque at 8.4V, the S5415H provides exceptional holding power, precise centering, and reliable performance under extreme aerodynamic loads.

Designed for oversized rudders, elevators, and other heavily loaded control surfaces, the S5415H is an ideal choice for 100cc–120cc giant-scale airplanes, turbine jets, large-scale warbirds, and high-performance 3D aerobatic aircraft. Its advanced coreless motor technology provides smooth operation and rapid response, while the heavy-duty metal gear train ensures long-term durability in demanding flight applications.

Premium Features for Serious RC Pilots

The FrSky S5415H combines a high-performance coreless motor, fully CNC-machined aluminum case, metal gear train, dual precision ball bearings, and high-voltage compatibility up to 8.4V into one powerful servo package. Integrated Soft Start Technology helps reduce startup shock loads on gears and control linkages, enhancing reliability and extending component life.

Whether you're flying a giant-scale aerobatic aircraft, turbine-powered jet, or large-scale warbird, the FrSky S5415H delivers the torque, precision, and control confidence required for the most demanding RC applications.

General Specifications – All Models