Editing Lockheed C-5 Galaxy (section)

===Restarted production and development===
In 1974, [[Pahlavi Iran|Imperial Iran]], having good relations with the United States, offered $160&nbsp;million (equivalent to ${{inflation|US|160|1974|r=0|fmt=c}} million today) to restart C-5 production to enable Iran to purchase aircraft for their own air force,<ref>{{Cite news |date=1974-05-08 |title=Iran may fund new production of Lockheed C-5 |url=https://www.newspapers.com/article/the-los-angeles-times-iran-may-fund-new/159648529/ |access-date=2024-11-24 |work=The Los Angeles Times |page=79 |via=[[Newspapers.com]]}}</ref><ref name="nytimes-textron-7-may-1974">{{cite news |last1=Wright |first1=Robert A. |url=https://www.nytimes.com/1974/05/08/archives/lockheed-considers-textron-merger-lockheed-weighs-textron-merger.html |title=Lockheed Considers Textron Merger |access-date=18 August 2024 |work=The New York Times |date=8 May 1974 |pages=61}}</ref> in a similar climate as to their acquisition of [[F-14 Tomcat]] fighters.<ref>{{Cite news |last=Marder |first=Murrey |date=1973-07-26 |title=Oil Pact With U.S. Firm: Iran Signs Agreement |url=https://www.newspapers.com/article/victoria-advocate-oil-pact-with-us-fir/159648277/ |access-date=2024-11-24 |work=Victoria Advocate |page=12 |via=[[Newspapers.com]]}}</ref> However, no C-5s were ordered by Iran, and the prospect was firmly halted by the [[Iranian Revolution]] in 1979 when the Imperial State of Iran was replaced by the [[Islamic State of Iran]].<ref>[https://news.google.co.uk/newspapers?id=U4kgAAAAIBAJ&sjid=4mUFAAAAIBAJ&pg=3119,2344531&dq=f14+iran&hl=en "Vital US military technology has been lost to new Iranian regime."] ''Lewiston Evening Journal'', 16 February 1979. Scan via news.google.co.uk</ref><ref>{{Cite news |date=1979-11-09 |title=U.S. cuts off plane parts to Iran |url=https://www.newspapers.com/article/chicago-tribune-us-cuts-off-plane-part/159648415/ |access-date=2024-11-24 |work=Chicago Tribune |page=1 |via=[[Newspapers.com]]}}</ref>

[[File:C-5 Galaxy - 081217-F-5350S-101.jpg|thumb|A Galaxy undergoing the AMP and RERP upgrades, to become a C-5M]]
As part of President [[Ronald Reagan]]'s military policy, funding was made available for expansion of the USAF's airlift capability. With the C-17 program still some years from completion, Congress approved funding for a new version of the C-5, the C-5B, in July 1982, to expand airlift capacity.<ref>{{Cite news |last=Rowley |first=Storer |date=1982-07-22 |title=House gives Reagan victories on MX, C-5 |url=https://www.newspapers.com/article/chicago-tribune-house-gives-reagan-victo/159648468/ |access-date=2024-11-24 |work=Chicago Tribune |page=1 |via=[[Newspapers.com]]}}</ref><ref>[https://news.google.co.uk/newspapers?id=YBcsAAAAIBAJ&sjid=6cgEAAAAIBAJ&pg=2279,4888426&dq=c-5+galaxy+development&hl=en "U.S. Air Force wants to double Airlift capacity."] ''Times Daily'', 27 January 1982. Scan via news.google.co.uk</ref><ref>Nalty 2003, p. 367.</ref> The first C-5B was delivered to Altus Air Force Base in January 1986. In April 1989, the last of 50 C-5B aircraft was added to the 77 C-5As in the Air Force's airlift force structure. The C-5B includes all C-5A improvements and numerous additional system modifications to improve reliability and maintainability.<ref>Norton 2003, pp. 56–58.</ref>

In 1998, the Avionics Modernization Program (AMP) began upgrading the C-5's avionics to include a [[glass cockpit]], navigation equipment, and a new autopilot system.<ref name="USAFafaJune2007">{{cite journal |last1=Schanz |first1=Marc V. |url=https://www.airandspaceforces.com/article/0607c5/ |title=Life With the C-5 |journal=Air & Space Forces Magazine |date=1 June 2007 |volume=90 |issue=6 |pages=59–60 |access-date=18 August 2024 |publisher=[[Air & Space Forces Association]] |issn=0730-6784}}</ref> Another part of the C-5 modernization effort is the Reliability Enhancement and Re-engining Program (RERP). The program replaced the engines with newer, more powerful ones.<ref name="afm_200401_stg">{{cite web |last1=Tirpak |first1=John A. |title=Saving the Galaxy|url=https://www.airandspaceforces.com/article/0104galaxy/ |website=Air & Space Forces Magazine |access-date= 18 August 2024 |date=1 January 2004}}</ref>

A total of 52 C-5s were contracted to be modernized, consisting of 49 B-, two C- and one A-model aircraft through the RERP. The program featured over 70 changes and upgrades, including the newer General Electric engines.<ref name="lock-mart-2nd-c5a">{{cite web |author1=PR Newswire |title=Lockheed Martin Delivers Second Production C-5M Super Galaxy to U.S. Air Force |url=https://news.lockheedmartin.com/2011-04-12-Lockheed-Martin-Delivers-Second-Production-C-5M-Super-Galaxy-to-U-S-Air-Force |publisher=[[Lockheed Martin]] |access-date=18 August 2024 |archive-url=https://archive.today/20130201085812/http://in.reuters.com/article/2011/04/12/idUS162171+12-Apr-2011+PRN20110412 |archive-date=1 February 2013 |url-status=live}}</ref><ref name="First production C-5M">{{cite web |last1=Trimble |first1=Stephen |url=https://www.flightglobal.com/lockheed-martin-inducts-first-c-5b-for-c-5m-modifications/88552.article |title=Lockheed Martin inducts first C-5B for C-5M modifications |website=Flight Global |publisher=DVV Media International Limited |access-date=18 August 2024 |language=en |date=21 August 2009}}</ref> Three C-5s underwent RERP for testing purposes. [[Low rate initial production|Low-rate initial production]] started in August 2009 with Lockheed reaching full production in May 2011;{{citation needed|date=September 2014}} 22 C-5M Super Galaxies have been completed as of August 2014.<ref>{{cite web |url=http://www.lockheedmartin.com/us/news/press-releases/2014/august/140825ae_double-deuce.html |title=Double Deuce |publisher=Lockheed Martin |date=August 2014 |url-status=dead |access-date=3 September 2014 |archive-date=4 September 2014 |archive-url=https://web.archive.org/web/20140904160146/http://www.lockheedmartin.com/us/news/press-releases/2014/august/140825ae_double-deuce.html }}</ref> RERP upgrades were completed on 25 July 2018. The Air Force received the last modified aircraft on 1 August 2018.<ref>{{cite web |url=https://www.af.mil/News/Article-Display/Article/1595570/galaxy-wraps-upgrades-to-become-c-5m-super-galaxy/ |title=Galaxy wraps upgrades to become C-5M Super Galaxy |author=Jonathan Bell |date=7 August 2018 |website=Official United States Air Force Website |access-date=30 May 2019}}</ref><ref name=":0">{{Cite web |last=Woody |first=Chris |date=2018-11-04 |title=Super Galaxys will now soar for decades, but the service has other transport problems |url=https://www.airforcetimes.com/news/your-air-force/2018/11/04/super-galaxys-will-now-soar-for-decades-but-the-service-has-other-transport-problems/ |access-date=2025-05-13 |website=Air Force Times |language=en}}</ref>

In 2014 Lockheed investigated drag reduction by plasma-heating of turbulent [[transonic]] airflow in critical points, saving overall weight by reducing fuel consumption. The [[Air Force Research Laboratory]] looked into [[shape-memory alloy]] for speed-dependent [[vortex generator]]s.<ref name="aviat-week-AFRL-drag">{{cite journal |last1=Warwick |first1=Graham |last2=Norris |first2=Guy |title=AFRL Seeks Drag-Reduction Technologies For Mobility Aircraft |website=aviationweek.com |date=23 September 2014 |url=https://aviationweek.com/aerospace/afrl-seeks-drag-reduction-technologies-mobility-aircraft |access-date=18 August 2024 |publisher=Aviation Week Network |issn=0005-2175 |url-access=subscription}}</ref>