JR Servos

JR servos have proven performance and reliability. I exclusively use the following servos on all of my helicopters.

This new servo from JR is the best CCPM servo featuring high speed and high torque. Coupled with ReactorX CCPM voltage bus regulator running at 6.8V, this servo is quite unbelievable.

DS8717 Ultra Speed Cyclic Servo

This new servo from JR is the best CCPM servo featuring high speed and high torque. Coupled with ReactorX CCPM voltage bus regulator running at 6.8V, this servo is quite unbelievable.

Specs

• Type:Ultra Speed Heli Cyclic Servo
• Torque:160 oz/in @ 4.8V; 196 oz/in @ 6V
• Speed:.09 sec/60° @ 4.8V, .07 sec/60° @ 6V
• Dimensions (WxLxH):.83" x 1.59" x 1.57"
• Weight:2.36 oz
• Gears:Metal

DS8900G Ultra-Speed Digital Gyro Servo 4.8V

I have now installed JR’s new 8900G tail rotor servo in 3D and F3C helicopters. It is faster than the 8700G, reliable, and has a very smooth response. I find it works very well with JR 7000T gyro and 770T gyro.

Specs

• Type:Digital Ultra Speed Heli Tail Servo
• Torque:48 oz-in @ 4.8V
• Speed:.05 sec/60 deg @ 4.8V
• Dimensions (WxLxH):.827"x1.59"x1.57"
• Weight:2.1 oz
• Bearing:Dual
• Motor Type:Coreless
• Gears:Nylon
• Application:Heli Tail Rotor
• Voltage:4.8V only
• Deadband:Zero deadband for ultra precision and performance

DS8317 Digital Hi-Speed MG Heli Servo

The 8317 servos are very precise and I have been using these on the CCPM controls of my F3C helicopters since 2005. I have logged hundreds of flights on these servos with no signs of wear or other issues.

Key Features

• High Speed Heli Collective Servo
• Ultra Precision Alloy Gears
• Digital Design Offers Outstanding Holding Torque and Precision
• 83.5 oz/in Torque with a Speedy .11-second Transit Time

Specs

• Type:Digital High-Speed
• Torque:69 oz/in @ 4.8V, 84 oz/in @ 6V
• Speed:.15 sec/60° @ 4.8v; .12 sec/60° @ 6.0v
• Dimensions (WxLxH):0.75"x1.54"x1.36"
• Weight:2.0 oz
• Bearing:Dual Ball Bearing
• Motor Type:Coreless
• Gears:Metal

DS3400G Digital Hi-Speed Mini Gyro Servo

To save weight (1oz lighter than standard size) by using a Mini servo, the 3400G is also much faster than most standard servos for the throttle. Governors will also benefit from the speed of this servo.

Key Features

• Digital Servo
• Mini Size
• Hi-Speed
• Nylon Gear Train

Specs

• Type:Digital Hi-Speed
• Torque:42 oz/in @ 4.8V, 51 oz/in @ 6V
• Speed:.11 sec/60° @ 4.8v, .09 sec/60° @ 6v
• Dimensions (WxLxH):.58" x 1.30" x 1.02"
• Weight:1.04 oz
• Gears:Nylon
• Application:Mini Gyro