Pushrod

The cam-within-a-cam concept has existed for decades, but perfecting it for production might just add another decade to the life of the pushrod engine.

An internal-gear hub with a hollow axle may be re-oiled by removing the pushrod or indicator spindle and squirting oil into the end of the axle.

Push Rod (81.85 mm) for Axle Length 168 mm

On 17 August 2005, a Saab 2000, at the ramp, with controls locked, was subjected to jet blast of around 126 kt (233 km/h) from a passing B747. This resulted in the bending of the left aileron control pushrod, causing it to fail at the time of takeoff. The crew had to make an emergency landing.