Futaba S3155 Digital High Speed Slim Metal Gear Micro Airplane Servo, NDAA Compliant
by Futaba

The Futaba S3155 Digital High Speed Slim Metal Gear Micro Servo is a precision micro actuator engineered for sailplanes, EDF jets, and ultra-thin wing profiles where mounting clearance is severely restricted. Featuring a slim 10.8mm width casing, this high-speed digital servo easily slides into thin wing cavities and tight control bays, providing reliable control surface actuation without disturbing aerodynamic flow.

Equipped with high-precision metal gears supported by dual ball bearings, the S3155 delivers exceptional holding power, accurate positioning, and fast response times to input commands from the transmitter. Operating at 4.8V, it yields 2.0 kg-cm (27.8 oz-in) of torque with a rapid transit speed of 0.16 sec/60 degrees. Additionally, this servo is fully NDAA Compliant (National Defense Authorization Act), making it an approved hardware choice for government-funded sUAS initiatives, commercial aerospace research, military drone maintenance, and university STEM labs requiring supply-chain-cleared electronic components.

Technical Specifications

• Brand: Futaba

• Model Identifier: S3155 (FUTM0655)

• Compliance Rating: NDAA Compliant

• Servo Class: Micro / Slim Wing Digital Servo

• Operating Voltage: 4.8V DC

• Operating Speed (4.8V): 0.16 sec / 60°

• Stall Torque (4.8V): 2.0 kg-cm (27.8 oz-in)

• Gear Train Material: Precision Metal Gear

• Bearing Type: Dual Ball Bearings (2BB)

• Dimensions: 30 mm x 10.8 mm x 29 mm (1.18" x 0.43" x 1.14")

• Net Weight: 20.0 grams (0.71 oz)

• Lead Length: 304.8 mm (12 inches)

• Target Applications: Glider and sailplane wing mounting, EDF jets, micro aircraft control surfaces, small sUAS airframes

What Is Included

• (1) Futaba S3155 Digital High Speed Slim Metal Gear Micro Servo

• (1) Star Servo Horn Accessory Pack (25mm and 39mm Star Horns)

• (1) Straight Servo Arm (45mm) and Round Horn (35mm)

• (1) Mounting Hardware Kit (Screws, Eyelets, and Rubber Grommets)