Exclusively operated by the United States Air Force, the B-36 Peacemaker built by Convair (Consolidated Vultee), was a piston-engine powered aircraft. The B-36 is also the largest mass-produced aircraft with piston engines between the years 1949-1959. The B-36 Bomber Peacemaker holds the largest wingspan of any combat fighter plane in history, even larger to many commercial planes today. Many of the commercial jet-powered airplanes today resemble its wings. As a strategic bomber, the B-36 was equipped with four bomb bays and the only plane that can carry a gravity bomb, which can produce the kind of damage similar to that of an earthquake, hence, its name.