Lockheed Martin P-791

The Lockheed Martin P-791 is an experimental hybrid airship that combines buoyant lift from its gas with aerodynamic lift from its shape, an attempt to gain both the speed of an aeroplane and the lifting power of an airship. It has a tri-hull form with disk-shaped cushions underneath for landing, and it first flew on 31 January 2006 at the company's flight test facility at Air Force Plant 42 in Palmdale, California. It was designed for the United States Army's Long Endurance Multi-intelligence Vehicle program but lost that competition to a Northrop Grumman design. It was then adapted as a civil cargo craft called SkyTug, and the commercial LMH-1 was marketed from its technology, with orders discussed in 2016 and a delayed first flight. In 2023 Lockheed Martin passed its airship assets to AT2 Aerospace, which continues the work as the Z1.