Lockheed Martin P-791
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The Lockheed Martin P-791 is an experimental aerostatic/aerodynamic hybrid airship, developed by Lockheed Martin. The first flight of the P-791 took place on 31 January 2006 at the company's flight test facility, located at Palmdale Air Force Plant 42.
The P-791 has a tri-hull shape, with disk-shaped cushions on the bottom for landing. As a hybrid airship, part of the weight of the craft and its payload are supported by aerostatic (buoyant) lift and the remainder is supported by aerodynamic lift. The combination of aerodynamic and aerostatic lift is an attempt to benefit from both the high speed of aerodynamic craft and the lifting capacity of aerostatic craft.
The P-791 was designed as part of the U.S. Army's Long Endurance Multi-intelligence Vehicle (LEMV) program, but lost the program's competition to Northrop Grumman's HAV-3 design. The P-791 was modified to be a civil cargo aircraft under the name SkyTug, with a lift capability of 20 tons (40,000 pounds) and plans to scale larger.
- Trimble, Stephen (30 December 2009), "US Army revives hybrid airship interest with LEMV", Flight Global
- Trimble, Stephen (2011-05-23). "Skunk Works P-791 airship revived as civil cargo-lifter". Flight Global.
- P-791 AVIATION WEEK[dead link]
- "Picture of the Lockheed Martin P-791 aircraft" Airliners.net
- Video of test flight snort.com
- "US looking to deploy long-endurance hybrid airship over Afghanistan" September 2009 engadget.com
- LM promotional video at YouTube
- Lockheed Martin (2010-09-01). "Hybrid Air Vehicle (P-791)". aerospaceblog.wordpress.com. "press release by Lockheed Martin Aeronautics"
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