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The Zeppelin NT series are a family of semi-rigid airships, combining the design principles of rigid airships and blimps together. [7] The Zeppelin N07, the base model and most commonly constructed to date, are 75 metres (246 ft) long, with a volume of 8,225 cubic metres (290,500 cu ft).
Like all modern airships, helium is the lifting gas. [2] The AS700 has an ellipsoid hull, with a rigid tail configuration done in an "X" positioning rather than the traditional "+" positioning. [2] The design is considered as a light and cost-effective capsule-shaped airship. [3] The tail has flight control surfaces to allow in ease in steering.
The cost included the design, development, and testing of the airship system within an 18-month time period, followed by transport to Afghanistan for military assessment. [10] Throughout development, technological challenges and multiple delays were encountered.
A non-rigid airship relies entirely on internal gas pressure to retain its shape during flight. Unlike the rigid design, the non-rigid airship's gas envelope has no compartments. However, it still typically has smaller internal bags containing air . As altitude is increased, the lifting gas expands and air from the ballonets is expelled through ...
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 short tons (18,000 kg) and plans to scale larger.
Spirit of Dubai – The Palm was one of three Skyship 600 aircraft operated by Airship Management Services of Greenwich, CT, USA. These ships are now the world's largest currently operating non-rigid airships. [note 1] The airship, N605SK (s/n 1215-05) was built by Airship Industries in Cardington, UK and first flew as G-SKSJ in November 1986. [9]
Construction of USS Shenandoah, 1923, showing the framework of a rigid airship. A rigid airship is a type of airship (or dirigible) in which the envelope is supported by an internal framework rather than by being kept in shape by the pressure of the lifting gas within the envelope, as in blimps (also called pressure airships) and semi-rigid airships.
A hybrid airship is a powered aircraft that obtains some of its lift as a lighter-than-air (LTA) airship and some from aerodynamic lift as a heavier-than-air aerodyne. A dynastat is a hybrid airship with fixed wings and/or a lifting body and is typically intended for long-endurance flights. It requires forward flight to create the aerodynamic ...