| 词条 | Lockheed Martin P-791 |
| 释义 |
The Lockheed Martin P-791 is an experimental aerostatic and 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 United States Air Force Plant 42 in Palmdale, CA.[1] DescriptionThe 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.[2] HistoryThe 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 {{convert|20|ST|kg|abbr=on}} and plans to scale larger.[3] In March 2016, Straightline Aviation signed a Letter of intent for 12 LMH1 airships, valued at $480 million.[4] LMH-1In 2014, Hybrid Enterprises from Atlanta, Georgia entered into an agreement with Lockheed Martin to market and sell the commercial LMH-1 Hybrid Aircraft built by Lockheed, based on the technology demonstrated by the P-791.[5] At the Paris Air Show in June 2015, Lockheed Martin announced that all required FAA certification planning steps were complete, and Hybrid Enterprises was accepting orders.[6] The LMH1 would initially transport 20 tonnes of cargo or 19 passengers, plus 2 crew members, with deliveries beginning in 2018.[7] In September 2016, plans were announced to operate the LMH-1 craft in Alaska.[8] In September 2017, it was announced that the first flight of the LMH-1 has been pushed to 2019.[9] LMZ1MLockheed Martin LMZ1M is the follow on to the P-791 test vehicle.[10][11]See also
References1. ^{{citation |url=http://www.flightglobal.com/articles/2009/12/30/336682/us-army-revives-hybrid-airship-interest-with-lemv.html |title=US Army revives hybrid airship interest with LEMV|work=Flight Global |date=30 December 2009 |first=Stephen |last=Trimble}} 2. ^{{cite web |title=A Comprehensive Look At Lockheed Martin's Hybrid Airships |url=https://www.forbes.com/sites/greatspeculations/2015/07/09/a-comprehensive-look-at-lockheed-martins-hybrid-airships/#79d5d3fd4c9d |website=forbes.com |publisher=Forbes |accessdate=3 March 2019 |language=English |quote=The airships are considered "hybrid" in nature because they apply both aerostatic (i.e., buoyant) and aerodynamic technologies to achieve lift, thereby exceeding dirigibles in speed and planes in economy.}} 3. ^{{cite web|url = http://www.flightglobal.com/news/articles/skunk-works-p-791-airship-revived-as-civil-cargo-lifter-354698| last = Trimble| first = Stephen| date = 2011-05-23| title = Skunk Works P-791 airship revived as civil cargo-lifter| journal = Flight Global}} 4. ^{{cite web|url=https://www.cnbc.com/2016/03/29/lockheed-has-liftoff-sells-new-airships-in-480m-deal.html|title=Lockheed has liftoff: Sells new airships in $480M deal|first=Jane|last=Wells|date=30 March 2016|website=www.cnbc.com|accessdate=30 December 2018}} 5. ^{{cite web |title=Hybrid Air Freighters Signs Letter of Intent to Purchase Lockheed Martin Hybrid Airships |url=https://www.prnewswire.com/news-releases/hybrid-air-freighters-signs-letter-of-intent-to-purchase-lockheed-martin-hybrid-airships-300474933.html |website=prnewswire.com |publisher=PR Newswire Association LLC |accessdate=15 March 2019 |language=English |date=20 June 2017}} 6. ^{{cite web|url = http://breakingdefense.com/2015/06/lockheed-hands-off-hybrid-airship-to-commercial-reseller/| last = Clark| first = Colin| date = 2015-06-16| title = Lockheed Hands Off Hybrid Airship To Commercial Reseller| journal = Breaking Defense}} 7. ^{{cite web|url = http://www.flightglobal.com/news/articles/paris-lockheed-introduces-new-hybrid-airship-design-413685/| last = Stevenson| first = Beth| date = 2015-06-16| title = PARIS: Lockheed introduces new hybrid airship design| journal = Flight Global}} 8. ^{{cite web|url=http://www.dpaonthenet.net/article/123705/Lockheed-Martin-hybrid-airships-are-coming-to-Alaska.aspx|title=Lockheed Martin hybrid airships are coming to Alaska|author=|date=|website=www.dpaonthenet.net|accessdate=30 December 2018}} 9. ^{{Cite web|url=https://www.skiesmag.com/news/lmh-1-airship-float-pushed-2019/|title=LMH-1 airship "float out" pushed to 2019|website=Skies Mag|language=en-US|access-date=2019-02-22}} 10. ^{{cite web|url=http://www.nbcnews.com/business/travel/improved-designs-technologies-welcome-new-era-airships-flna6C10626754|title=Improved designs and technologies welcome a 'new era of airships'|author=|date=|website=NBC News|accessdate=30 December 2018}} 11. ^{{cite web|url=http://aviationweek.com/blog/proposed-rules-provide-peek-lockheeds-cargo-airship|title=Proposed Rules Provide Peek at Lockheed's Cargo Airship|first=Graham Warwick in Things With|last=Wings|date=|website=aviationweek.com|accessdate=30 December 2018}} External links
|title=Hybrid Air Vehicle (P-791) |date=2010-09-01 |author=Lockheed Martin |url=http://aerospaceblog.wordpress.com/2010/09/01/hybrid-air-vehicle-p-791/ |work=aerospaceblog.wordpress.com |quote=press release by Lockheed Martin Aeronautics }} {{Lockheed aircraft}}{{Use dmy dates|date=August 2011}}{{aero-2000s-stub}} 3 : Lockheed Martin aircraft|United States experimental aircraft 2000–2009|Airships of the United States |
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