Futaba S-U400 Standard Servo (ERP) - 0.13sec 7.9kg, 36g  [FP-S-U400]

Futaba S-U400: reliable standard servo for precise control

The Futaba S-U400 standard servo delivers a straightforward combination of speed and holding strength. Rated at 0.13sec and 7.9kg torque, and weighing 36g, it is well suited to steering and auxiliary functions in a broad range of RC models. Its predictable behaviour makes setup and tuning more straightforward for club racers and hobbyists alike.

How the S-U400 enhances handling and control

Quick actuation and steady torque let the S-U400 produce smooth, accurate movement of control surfaces and steering linkages. This consistency helps drivers maintain line and timing through technical sections or tight corners.

Performance balance: quick action with firm hold

The 0.13sec speed gives prompt response for corrective inputs, while 7.9kg torque ensures components stay under control when stressed. The lightweight 36g form helps keep the centre of mass low, aiding overall vehicle balance.

Best practices for installation and upkeep

Ensure the servo is mounted on a rigid bracket, set endpoints to avoid overtravel, and pair with a stable power source. Routine checks of the horn, screws and wiring will reduce the chance of failures and maintain precise operation.

For those seeking a trustworthy standard servo, the Futaba S-U400 offers reliable speed and torque without excess weight. It is a sensible option for steering tasks and other control functions where predictable performance is key.