Internal support plate and tank for the backup oxygen supply backpack of the MC-2 pressure suit used by X-15 pilots, measuring approximately 17″ x 21″ x 3″, retaining a small amount of the tubing and two Air-Lock buckles on the front. The X-15 was designed with a sophisticated ejector seat that allowed safe pilot ejection at speeds as high as Mach 4 and altitudes up to 120,000 feet. The backup oxygen pack was activated as soon as the pilot pulled the ejection handles and provided enough oxygen for about twenty minutes. A parachute pack was also integrated into the suit and attached to the backpack. Although the MC-2 suit was only used on sixteen X-15 flights, it represented a breakthrough in suit technology and served as a model for spacesuits of the future.
