Propeller Slip Rings


Fixed wing propeller aircraft use specialist de-icing slip rings to pass electrical power from the airframe generators to the rotating propellers. These propellers are heated to avoid the build up of ice either in flight or on the ground in difficult weather conditions. The correct choice of materials for the rings and brushes, together with a very fine surface finish on the rings themselves, ensure the optimum life of the unit in operation. The life time is generally in excess of 1500 hours at 1200 rpm – equivalent to >100 million revolutions, with only a simple maintenance operation to change the brushes and brush block. Units are designed for each application in conjunction with the customers’ requirements.


Typically these slip rings are supplied to the propeller system manufacturer. Moog Components pedigree extends over many years and the following programmes are examples of where our products are used:

    Jetstream           De Havilland Dash 8            
    Fokker 50            Lockheed Martin C130J
    SAAB 340            ATR42
    Grumman            Airbus A400M
    SAAB 2000

For more information about how Moog's propeller slip rings can fit your specific application, contact our slip ring experts.


  • Low brush wear
  • Integrated rings and housings
  • Beryllium free design
  • Low maintenance solution, replaceable brushes
  • Diamond turned finish on the slip ring

Typical Applications

  • Blade de-ice

Related Industries / Markets / Applications


High-performance helicopter solutions meet the demands of rugged environments.

Armored Vehicles

Reliable power and data transfer in the most demanding batterfield conditions.

EO / IR Systems

Vast amounts of electrical and data signals transmitted across rotating axes.