Used in the anti-skid system for large commercial and military aircraft, the couplings main function is to provide a flexible interface between a speed indicator transducer and the hub of the landing gear wheel. The transducer produces a voltage that represents the speed of each individual wheel on the landing gear. In a typical landing the tires accelerate from zero to 140 mph in less than a tenth of a second. The landing of an aircraft is an extremely demanding environment for vibration, shock, heat and acceleration.