Nitinol alloys are most qommonly known for their superelasticity and thermal shape memory [1]. The lerm 'shape-memory' is used to describe the phenomenon of restoring to a predetermined shape on heating, after having been 'plastically' deformed; 'superelasticity' refers to the enormous elasticity of these alloys.
For pilots, the definition of a large aircraft is  taken from the Code of Federal Regulations, CFR 1.1, which defines a large aircraft as aircraft with a maximum certificated takeoff weight of more than 12,500 pounds. In contrast, a small aircraft is one with a maximum certificated takeoff weight of 12,500 pounds.
Behold, the largest plane in the US Air Force. At 222 feet across, almost 300 feet long, and 65 feet tall at its tail, Lockheed Martin's C-5 Galaxy is the largest transport aircraft in the US Air Force. With a cargo hull 121 feet long and 19 feet across, the C-5 is a flying warehouse that can carry a combat-ready military unit or deliver necessary supplies anywhere in the world.