Futaba HPS-A704 Brushless Servo S.Bus2 16kg 0.06s

The Futaba HPS-A704 is a high-performance, high-voltage brushless servo designed for precision aircraft control. Supporting PWM along with S.Bus and S.Bus2, it delivers rapid response and consistent centring, making it a strong choice for F3A applications. Part number FUT05102724-3.

With a custom high-speed brushless motor and metal final gear, the HPS-A704 combines speed and durability in a lightweight plastic case. Transit time is 0.06 s/60° at 7.4V (0.07 s/60° at 6.6V), with torque up to 14.0 kgf·cm (194.4 ozf·in) at 7.4V. Rated for 6.0–7.4V and operating across 4.8–8.4V, it suits modern HV receiver and power setups.

Note: NO DRY BATTERY OR BEC USE.

Key Features

• For F3A airplanes
• Programmable/high-performance brushless servo
• Custom new high-speed brushless motor
• Designed with F3A in mind
• Programmable and compatible with S.Bus and S.Bus2 systems
• Can be connected to a PC using the CIU-2/-3 USB adapter (sold separately)
• Final gear material is metal
• Upper/middle/bottom: Plastic case

What’s In The Box

• 1x HPS-A704 Low Profile Brushless Servo
• Horns
• Mounting hardware

Technical Specifications

• Speed: 0.07 s/60° (6.6V); 0.06 s/60° (7.4V)
• Torque: 12.5 kgf·cm / 173.6 ozf·in (6.6V); 14.0 kgf·cm / 194.4 ozf·in (7.4V)
• Size: 40.5 x 21 x 26.9 mm (1.59 x 0.83 x 1.06 in)
• Weight: 48 g (1.69 oz)
• Rated voltage: DC 6.0–7.4V
• Operating voltage: DC 4.8–8.4V
• Servo size: Low profile
• Product length/width/height: 41 x 21 x 27 mm (approx.)
• Shipping weight: 0.10 kg (0.22 lb)
• Colour: Black; Case material: Plastic; Final gear: Metal
• Age recommendation: 14+