Undercarriage

Undercarriage is the part of a moving vehicle that is underneath the main body of the vehicle. The term originally applied to this part of a horse-drawn carriage, and usage has since broadened to include:


 * The landing gear of an aircraft.
 * The chassis of an automobile.
 * The tractor treads of a tractor or tank.
 * The underframe of a locomotive
 * The undercarriage assembly of a train car or locomotive, known as a bogie, incorporating the train wheel sets, suspension, brakes and, in powered units, the traction motors