Shock strut

A device in an aircraft landing gear that absorbs the shock which occurs when an aircraft touches down on landing. The most commonly used shock absorber is the oleo (oil and air) shock strut. The initial landing impact is taken up by oil transferring from one chamber inside the shock absorber to another through a metering orifice. The much smaller shocks that occur when the aircraft is taxiing are taken up by a cushion of compressed air.