Editing Lockheed C-130 Hercules (section)

===Replacement===
In October 2010, the U.S. Air Force released a capability request for information (CRFI) for the development of a new airlifter to replace the C-130. The new aircraft was to carry a 190% greater payload and assume the mission of mounted vertical maneuver (MVM). The greater payload and mission would enable it to carry medium-weight armored vehicles and unload them at locations without long runways. Various options were under consideration, including new or upgraded fixed-wing designs, rotorcraft, [[tiltrotor]]s, or even an [[airship]]. The C-130 fleet of around 450 planes would be replaced by only 250 aircraft.<ref>[https://web.archive.org/web/20150717161455/http://www.flightglobal.com/blogs/the-dewline/2010/10/usaf-asks-industry-to-answer-c/ USAF asks industry to answer C-130 replacement questions] – ''FlightGlobal'', 22 October 2010</ref> The Air Force had attempted to replace the C-130 in the 1970s through the [[Advanced Medium STOL Transport]] project, which resulted in the [[C-17 Globemaster III]] that instead replaced the [[C-141 Starlifter]].<ref name="speedagile">[https://web.archive.org/web/20150413115830/http://www.flightglobal.com/blogs/the-dewline/2011/09/images-lockheeds-stealth-c-130/ Lockheed's stealth C-130 successor revealed] – ''FlightGlobal'', 13 September 2011</ref>

The [[Air Force Research Laboratory]] funded Lockheed Martin and Boeing demonstrators for the ''Speed Agile'' concept, which had the goal of making a STOL aircraft that could take off and land at speeds as low as {{convert|70|kn|abbr=on}} on airfields less than {{convert|2,000|ft|m|abbr=on}} long and cruise at Mach 0.8-plus. Boeing's design used upper-surface blowing from embedded engines on the inboard wing and blown flaps for circulation control on the outboard wing. Lockheed's design also used blown flaps outboard, but inboard used patented reversing ejector nozzles.<ref name="auto1">[http://www.aviationweek.com/Blogs.aspx?plckBlogId=blog:27ec4a53-dcc8-42d0-bd3a-01329aef79a7&plckPostId=Blog:27ec4a53-dcc8-42d0-bd3a-01329aef79a7Post:4ed2785f-832c-4f7f-8a7b-1d820cb2b07a Fast STOL – Lockheed's Speed Agile] {{webarchive|url=https://web.archive.org/web/20140203023534/http://www.aviationweek.com/Blogs.aspx?plckBlogId=blog:27ec4a53-dcc8-42d0-bd3a-01329aef79a7&plckPostId=Blog:27ec4a53-dcc8-42d0-bd3a-01329aef79a7Post:4ed2785f-832c-4f7f-8a7b-1d820cb2b07a |date=3 February 2014}} – Aviationweek.com, 15 October 2010</ref>

Boeing's design completed over 2,000 hours of wind tunnel tests in late 2009. It was a 5 percent-scale model of a narrow body design with a {{convert|55000|lb|kg|abbr=on}} payload. When the AFRL increased the payload requirement to {{convert|65000|lb|kg|abbr=on}}, they tested a 5 percent-scale model of a widebody design with a {{convert|303000|lb|kg|abbr=on}} take-off gross weight and an "[[A400M]]-size" {{convert|158|in|m|abbr=on}} wide cargo box. It would be powered by four [[IAE V2500|IAE V2533]] turbofans.<ref name="auto1"/>

In August 2011, the AFRL released pictures of the Lockheed Speed Agile concept demonstrator. A 23% scale model went through wind tunnel tests to demonstrate its hybrid powered lift, which combined a low drag airframe with simple mechanical assembly to reduce weight and improve aerodynamics. The model had four engines, including two [[Williams FJ44]] turbofans.<ref name="speedagile"/><ref>{{usurped|1=[https://web.archive.org/web/20131127162334/http://defensetech.org/2011/09/15/lockheeds-new-stol-airlifter-design/ Lockheed's New STOL Airlifter Design]}} – Defensetech.org, 15 September 2011</ref> On 26 March 2013, Boeing was granted a patent for its swept-wing powered lift aircraft.<ref>[https://web.archive.org/web/20141014212713/http://www.flightglobal.com/blogs/the-dewline/2013/04/boeing-awarded-patent-speed-ag/ Boeing awarded patent for Speed Agile stealth transport concept] – ''FlightGlobal'', 2 April 2013</ref>

In January 2014, [[Air Mobility Command]], [[Air Force Materiel Command]] and the Air Force Research Lab were in the early stages of defining requirements for the C-X next generation airlifter program<ref>{{Cite web|url=https://othjournal.com/2017/03/06/next-gen-cx/|title=C-X: Next-Gen Cargo Plane for the Joint Force|last=Horizon|first=Over The|date=6 March 2017|website=OTH|language=en-US|access-date=21 February 2019|archive-url=https://web.archive.org/web/20190221224230/https://othjournal.com/2017/03/06/next-gen-cx/|archive-date=21 February 2019|url-status=live}}</ref> to replace both the C-130 and C-17. The aircraft would be produced from the early 2030s to the 2040s.<ref>{{Cite web |title=Daily Report |url=https://www.airforcemag.com/daily-report/ |access-date=2022-07-22 |website=Air Force Magazine |language=en-US}}</ref>