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DS3421 Ultra Torque Servo by JR



Product Description


Key Features

  • Reliability and digital holding torque
  • Composite-metal geartrain
  • High-frequency digital amplifier



A favorite of many jet and precision aerobatic fliers, the 3421 has proven to be invaluable for use in high-performance aircraft when space and weight are at a premium, yet the need for precision is high. The 3421’s superb holding power and zero deadband have proven to be vital for controlling some of the world’s most popular performance aircraft.


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