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The Lockheed C-5 Galaxy is a large military transport aircraft designed and built by Lockheed, and now maintained and upgraded by its successor,
Lockheed Martin The Lockheed Martin Corporation is an American aerospace, arms, defense, information security, and technology corporation with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It ...
. It provides the United States Air Force (USAF) with a heavy intercontinental-range strategic airlift capability, one that can carry outsized and oversized loads, including all air-certifiable cargo. The Galaxy has many similarities to the smaller Lockheed C-141 Starlifter and the later
Boeing C-17 Globemaster III The McDonnell Douglas/Boeing C-17 Globemaster III is a large military transport aircraft that was developed for the United States Air Force (USAF) from the 1980s to the early 1990s by McDonnell Douglas. The C-17 carries forward the name of two ...
. The C-5 is among the largest military aircraft in the world. The C-5 Galaxy's development was complicated, including significant cost overruns, and Lockheed suffered significant financial difficulties. Shortly after entering service, cracks in the wings of many aircraft were discovered and the C-5 fleet was restricted in capability until corrective work was completed. The C-5M Super Galaxy is an upgraded version with new engines and modernized avionics designed to extend its service life to 2040 and beyond. The USAF has operated the C-5 since 1969. In that time, the airlifter supported US military operations in all major conflicts including Vietnam, Iraq, Yugoslavia, and Afghanistan, as well as allied support, such as Israel during the Yom Kippur War and operations in the Gulf War. The Galaxy has also distributed humanitarian aid, provided disaster relief, and supported the US space program.


Development


CX-X and Heavy Logistics System

In 1961, several aircraft companies began studying heavy jet transport designs that would replace the Douglas C-133 Cargomaster and complement Lockheed C-141 Starlifters. In addition to higher overall performance, the United States Army wanted a transport aircraft with a larger cargo bay than the C-141, whose interior was too small to carry a variety of their outsized equipment. These studies led to the "CX-4" design concept, but in 1962, the proposed six-engined design was rejected, because it was not viewed as a significant advance over the C-141. By late 1963, the next conceptual design was named CX-X. It was equipped with four engines, instead of six in the earlier CX-4 concept. The CX-X had a gross weight of , a maximum payload of , and a speed of Mach 0.75 (). The cargo compartment was wide by high and long with front and rear access doors."C-5 history."
GlobalSecurity.org. Retrieved 20 January 2010.
USAF studies showed that high-bypass turbofan engines were needed for thrust and
fuel efficiency Fuel efficiency is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical potential energy contained in a carrier (fuel) into kinetic energy or work. Overall fuel efficiency may vary per device, wh ...
requirements. The criteria were finalized and an official request for proposal was issued in April 1964 for the "Heavy Logistics System" (CX-HLS) (previously CX-X). In May 1964, proposals for aircraft were received from Boeing,
Douglas Douglas may refer to: People * Douglas (given name) * Douglas (surname) Animals *Douglas (parrot), macaw that starred as the parrot ''Rosalinda'' in Pippi Longstocking *Douglas the camel, a camel in the Confederate Army in the American Civil W ...
,
General Dynamics General Dynamics Corporation (GD) is an American publicly traded, aerospace and defense corporation headquartered in Reston, Virginia. As of 2020, it was the fifth-largest defense contractor in the world by arms sales, and 5th largest in the Uni ...
, Lockheed, and
Martin Marietta The Martin Marietta Corporation was an American company founded in 1961 through the merger of Glenn L. Martin Company and American-Marietta Corporation. In 1995, it merged with Lockheed Corporation to form Lockheed Martin. History Martin Mari ...
. General Electric, Curtiss-Wright, and
Pratt & Whitney Pratt & Whitney is an American aerospace manufacturer with global service operations. It is a subsidiary of Raytheon Technologies. Pratt & Whitney's aircraft engines are widely used in both civil aviation (especially airlines) and military aviat ...
submitted proposals for the engines. After a downselect, Boeing, Douglas, and Lockheed were given one-year study contracts for the airframe, along with General Electric and Pratt & Whitney for the engines.Norton 2003, pp. 8–9. All three of the designs shared a number of features. The cockpit was placed well above the cargo area to allow for cargo loading through a nose door. The Boeing and Douglas designs used a pod on the top of the fuselage containing the cockpit, while the Lockheed design extended the cockpit profile down the length of the fuselage, giving it an egg-shaped cross section. All of the designs had
swept wing A swept wing is a wing that angles either backward or occasionally forward from its root rather than in a straight sideways direction. Swept wings have been flown since the pioneer days of aviation. Wing sweep at high speeds was first investigate ...
s, as well as front and rear cargo doors, allowing simultaneous loading and unloading. Lockheed's design featured a T-tail, while the designs by Boeing and Douglas had conventional tails.Norton 2003, pp. 12–13. The Air Force considered Boeing's design to be better than that of Lockheed, but Lockheed's proposal was the lowest total-cost bid.Norton 2003, p. 11. Lockheed was selected as the winner in September 1965, then awarded a contract in December 1965.Erving 1993, pp. 189–190. General Electric's
TF39 The General Electric TF39 was a high-bypass turbofan engine that was developed to power the Lockheed C-5 Galaxy. The TF39 was the first high-power, high-bypass jet engine developed. The TF39 was further developed into the CF6 series of engines, ...
engine was selected in August 1965 to power the new transport plane. At the time, GE's engine concept was revolutionary, as all engines before had a bypass ratio less than two-to-one, while the TF39 promised and would achieve a ratio of eight-to-one, which had the benefits of increased engine thrust and lower fuel consumption. Boeing lost the military contract but went on to develop the successful 747 civilian airliner with over 1,500 aircraft built when manufacturing ended in 2022 after 54 years of production.


Into production

The first C-5A Galaxy (
serial number A serial number is a unique identifier assigned incrementally or sequentially to an item, to ''uniquely'' identify it. Serial numbers need not be strictly numerical. They may contain letters and other typographical symbols, or may consist enti ...
''66-8303'') was rolled out of the manufacturing plant in Marietta, Georgia, on 2 March 1968. On 30 June 1968, flight testing of the C-5A began with the first flight, flown by Leo Sullivan, with the call sign "eight-three-oh-three heavy". Flight tests revealed that the aircraft exhibited a higher drag divergence Mach number than predicted by wind tunnel data. The maximum lift coefficient measured in flight with the flaps deflected 40° was higher than predicted (2.60 vs. 2.38), but was lower than predicted with the flaps deflected 25° (2.31 vs. 2.38) and with the flaps retracted (1.45 vs. 1.52).Garrard, Wilfred C. "The Lockheed C-5 Case Study in Aircraft Design". ''AIAA Professional Study Series''. Aircraft weight was a serious issue during design and development. At the time of the first flight, the weight was below the guaranteed weight, but by the time of the delivery of the 9th aircraft, had exceeded guarantees. In July 1969, during a fuselage upbending test, the wing failed at 128% of limit load, which is below the requirement that it sustain 150% of limit load. Changes were made to the wing, but during a test in July 1970, it failed at 125% of limit load. A passive load-reduction system, involving uprigged ailerons, was incorporated, but the maximum allowable payload was reduced from . At the time, a 90% probability was predicted that no more than 10% of the fleet of 79 airframes would reach their
fatigue Fatigue describes a state of tiredness that does not resolve with rest or sleep. In general usage, fatigue is synonymous with extreme tiredness or exhaustion that normally follows prolonged physical or mental activity. When it does not resolve ...
life of 19,000 hours without cracking of the wing. Cost overruns and technical problems of the C-5A were the subject of a congressional investigation in 1968 and 1969. The C-5 program has the dubious distinction of being the first development program with a $1billion (equivalent to $ billion today) overrun.Garwood, Darrell
"Newest Air Force planes grounded"
''Times-News'', 17 January 1970.
Due to the C-5's troubled development, the Department of Defense abandoned
Total Package Procurement Total Package Procurement (TPP or alternatively TPPC) was a major systems acquisition policy introduced in the United States Department of Defense in the mid-1960s by Secretary of Defense Robert MacNamara. It was conceived by Assistant Secretary ...
. In 1969, Henry Durham raised concerns about the C-5 production process with Lockheed, his employer. Subsequently, Durham was transferred and subjected to abuse until he resigned. The
Government Accountability Office The U.S. Government Accountability Office (GAO) is a legislative branch government agency that provides auditing, evaluative, and investigative services for the United States Congress. It is the supreme audit institution of the federal govern ...
substantiated some of his charges against Lockheed. Later, the
American Ethical Union The Ethical movement, also referred to as the Ethical Culture movement, Ethical Humanism or simply Ethical Culture, is an ethical, educational, and religion, religious movement that is usually traced back to Felix Adler (professor), Felix Adler ...
honored Durham with the Elliott-Black Award. The Deputy Assistant Secretary of the Air Force for Management Systems, Ernest Fitzgerald, was another person whose fostering of public accountability was unwelcome. Upon completion of testing in December 1969, the first C-5A was transferred to the Transitional Training Unit at Altus Air Force Base, Oklahoma. Lockheed delivered the first operational Galaxy to the
437th Airlift Wing The 437th Airlift Wing (437 AW) is an active unit of the United States Air Force, assigned to 18th Air Force, Air Mobility Command. It is the mission wing at Charleston Air Force Base, Joint Base Charleston, in the City of North Charleston, Sou ...
,
Charleston Air Force Base Charleston Air Force Base is a United States military facility located in the City of North Charleston, South Carolina. The facility is under the jurisdiction of the United States Air Force's 628th Air Base Wing (628 ABW), a subordinate element ...
, South Carolina, in June 1970. Due to higher than expected development costs, in 1970, public calls were made for the government to split the substantial losses that Lockheed was experiencing. Production was nearly brought to a halt in 1971 as Lockheed went through financial difficulties, due in part to the C-5 Galaxy's development, as well as a civilian jet liner, the Lockheed L-1011. The U.S. government gave loans to Lockheed to keep the company operational. In the early 1970s, NASA considered the C-5 for the Shuttle Carrier Aircraft role, to transport the Space Shuttle to Kennedy Space Center. However, they rejected it in favor of the
Boeing 747 The Boeing 747 is a large, long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2022. After introducing the 707 in October 1958, Pan Am wanted a jet times its size, t ...
, in part due to the 747's low-wing design. In contrast, the Soviet Union chose to transport its shuttles using the high-winged An-225, which derived from the An-124, which is similar in design and function to the C-5. During static and fatigue testing, cracks were noticed in the wings of several aircraft, and as a consequence, the C-5A fleet was restricted to 80% of maximum design loads. To reduce wing loading, load alleviation systems were added to the aircraft. By 1980, payloads were restricted to as low as for general cargo during peacetime operations. A $1.5 billion program (equivalent to $ billion today), known as H-Mod, to re-wing the 76 completed C-5As to restore full payload capability and service life began in 1976. After design and testing of the new wing design, the C-5As received their new wings from 1980 to 1987.Norton 2003, pp. 53–56.


Restarted production and development

In 1974, Iran, then having good relations with the United States, offered $160 million (equivalent to $ million today) to restart C-5 production to enable Iran to purchase aircraft for their own air force, in a similar climate as to their acquisition of F-14 Tomcat fighters. However, no C-5 aircraft were ever ordered by Iran, and the prospect was firmly halted by the
Iranian Revolution The Iranian Revolution ( fa, انقلاب ایران, Enqelâb-e Irân, ), also known as the Islamic Revolution ( fa, انقلاب اسلامی, Enqelâb-e Eslâmī), was a series of events that culminated in the overthrow of the Pahlavi dynas ...
in 1979. As part of President
Ronald Reagan Ronald Wilson Reagan ( ; February 6, 1911June 5, 2004) was an American politician, actor, and union leader who served as the 40th president of the United States from 1981 to 1989. He also served as the 33rd governor of California from 1967 ...
'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. 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. In 1998, the Avionics Modernization Program (AMP) began upgrading the C-5's avionics to include a
glass cockpit A glass cockpit is an aircraft cockpit that features electronic (digital) flight instrument displays, typically large LCD screens, rather than the traditional style of analog dials and gauges. While a traditional cockpit relies on numerous mech ...
, navigation equipment, and a new autopilot system.Schanz, Marc V., Assoc. Editor
"Life with the C-5."
''Air Force Magazine'', Volume 90, Issue 6, June 2007, pp. 59–60. .
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.Tirpak, John A
"Saving the Galaxy."
''Air Force Magazine'', January 2004.
A total of 52 C-5s are contracted to be modernized, consisting of 49 B-, two C- and one A-model aircraft through the RERP. The program features over 70 changes and upgrades, including the newer General Electric engines.Trimble, Stephen

'' Flight International'', 21 August 2009.
Three C-5s underwent RERP for testing purposes. Low-rate initial production started in August 2009 with Lockheed reaching full production in May 2011; 22 C-5M Super Galaxies have been completed as of August 2014. RERP upgrades were completed on 25 July 2018. The Air Force received the last modified aircraft on 1 August 2018. , Lockheed is investigating drag reduction by plasma-heating of turbulent transonic airflow in critical points, saving overall weight by reducing fuel consumption. The Air Force Research Laboratory is looking at shape-memory alloy for speed-dependent vortex generators.


Design

The C-5 is a large, high-wing cargo aircraft with a distinctive high T-tail fin (vertical) stabilizer, with four
TF39 The General Electric TF39 was a high-bypass turbofan engine that was developed to power the Lockheed C-5 Galaxy. The TF39 was the first high-power, high-bypass jet engine developed. The TF39 was further developed into the CF6 series of engines, ...
turbofan engines mounted on pylons beneath wings that are swept 25°. (The C-5M uses newer GE CF6 engines.) Similar in layout to its smaller predecessor, the C-141 Starlifter, the C-5 has 12 internal wing tanks and is equipped for
aerial refueling Aerial refueling, also referred to as air refueling, in-flight refueling (IFR), air-to-air refueling (AAR), and tanking, is the process of transferring aviation fuel from one aircraft (the tanker) to another (the receiver) while both aircraft a ...
. Above the plane-length cargo deck is an upper deck for flight operations and for seating 80 passengers in rear facing seats (unlike most commercial airplanes) and the embarked loadmaster crew in forward facing seats. Bay doors at both nose and tail open to enable "drive-through" loading and unloading of cargo."C-5 design."
''Globalsecurity.org'', 20 January 2010.
The cargo hold of the C-5 is longer than the entire length of the first powered flight by the Wright brothers at Kitty Hawk. For its voracious consumption of fuel and its maintenance and reliability issues the Galaxy's aircrews have nicknamed it "FRED", for Fucking Ridiculous, Economic/Environmental Disaster.Lippincott 2006, p. 4. Takeoff and landing distance requirements for the plane at maximum-load gross weight are and , respectively. Its high-flotation main landing gear provides 28 wheels to distribute gross weight on paved or earth surfaces. The rear main landing gear can be made to caster to make a smaller turning radius, and rotates 90° after takeoff before being retracted. "Kneeling" landing gear permits lowering the aircraft when parked, thereby presenting the cargo deck at truck-bed height to facilitate loading and unloading operations.''Air International''. February 1984, p. 63. The C-5 features a malfunction detection analysis and recording system to identify errors throughout the aircraft. The cargo compartment is long, high, and wide, or just over . It can accommodate up to 36
463L master pallet The HCU-6/E or 463L Master Pallet is a standardized pallet used for transporting military air cargo. It is the main air-cargo pallet of the United States Air Force, designed to be loaded and offloaded on today's military airlifters as well as ...
s or a mix of palletized cargo and vehicles. The nose and aft cargo-bay doors open the full width and height of the cargo bay to maximize efficient loading of oversized equipment. Full-width ramps enable loading double rows of vehicles from either end of the cargo hold. The C-5 Galaxy is capable of moving nearly every type of military combat equipment, including such bulky items as the Army armored vehicle launched bridge, at , from the United States to any location on the globe; and of accommodating up to six Boeing AH-64 Apache helicopters or five Bradley Fighting Vehicles at one time.Congressional Budget Office 1986, p. 46.


Operational history

The first C-5A was delivered to the USAF on 17 December 1969. Wings were built up in the early 1970s at Altus AFB, Oklahoma;
Charleston AFB Charleston Air Force Base is a United States military facility located in the City of North Charleston, South Carolina. The facility is under the jurisdiction of the United States Air Force's 628th Air Base Wing (628 ABW), a subordinate element ...
, South Carolina; Dover AFB, Delaware; and Travis AFB, California. The C-5's first mission was on 9 July 1970, in Southeast Asia during the Vietnam War. C-5s were used to transport equipment and troops, including Army tanks and even some small aircraft, throughout the later years of the US action in Vietnam.Norton 2003, pp. 43–44. In the final weeks of the war, prior to the Fall of Saigon, several C-5s were involved in evacuation efforts. During one such mission, a C-5A crashed while transporting a large number of orphans, with over 140 killed. C-5s have also been used to deliver support and reinforce various US allies over the years. During the Yom Kippur War in 1973, multiple C-5s and C-141 Starlifters delivered critical supplies of ammunition, replacement weaponry and other forms of aid to Israel, the US effort was named as
Operation Nickel Grass Operation Nickel Grass was a strategic airlift operation conducted by the United States to deliver weapons and supplies to Israel during the 1973 Yom Kippur War. Over 32 days, the United States Air Force (USAF) Military Airlift Command (MAC) sh ...
.Norton 2003, pp. 45–46. The C-5 Galaxy's performance in Israel was such that the Pentagon began to consider further purchases. The C-5 was regularly made available to support American allies, such as the British-led peacekeeper initiative in Zimbabwe in 1979. On 24 October 1974, the Space and Missile Systems Organization successfully conducted an air-launched ballistic missile test, where a C-5A Galaxy aircraft air dropped an Minuteman ICBM from over the Pacific Ocean. The missile descended to before its rocket engine fired. The 10-second engine burn carried the missile to again before it dropped into the ocean. The test proved the feasibility of launching an intercontinental ballistic missile from the air. Operational deployment was discarded due to engineering and security difficulties, though the capability was used as a negotiating point in the
Strategic Arms Limitation Talks The Strategic Arms Limitation Talks (SALT) were two rounds of bilateral conferences and corresponding international treaties involving the United States and the Soviet Union. The Cold War superpowers dealt with arms control in two rounds of ta ...
. Aircraft 69–0014, "Zero-One-Four" used in the test was retired to the Air Mobility Command Museum at Dover Air Force Base. The C-5 has been used for several unusual functions. During the development of the secretive stealth fighter, the Lockheed F-117 Nighthawk, Galaxies were often used to carry partly disassembled aircraft, leaving no exterior signs as to their cargo. The C-5 remains the largest aircraft to operate in the Antarctic, capable of operating from
Williams Field Williams Field or Willy Field is a United States Antarctic Program airfield in Antarctica. Williams Field consists of two snow runways located on approximately 8 meters (25 ft) of compacted snow, lying on top of 8–10 ft of ice, floa ...
near
McMurdo Station McMurdo Station is a United States Antarctic research station on the south tip of Ross Island, which is in the New Zealand-claimed Ross Dependency on the shore of McMurdo Sound in Antarctica. It is operated by the United States through the Unit ...
. The C-5 Galaxy was a major supply asset in the international coalition operations in 1990–91 against Iraq in the Gulf War. C-5s have routinely delivered relief aid and humanitarian supplies to areas afflicted with natural disasters or crisis; multiple flights were made over
Rwanda Rwanda (; rw, u Rwanda ), officially the Republic of Rwanda, is a landlocked country in the Great Rift Valley of Central Africa, where the African Great Lakes region and Southeast Africa converge. Located a few degrees south of the Equator ...
in 1994. The C-5 is also used to transport
Marine One Marine One is the call sign of any United States Marine Corps aircraft carrying the president of the United States. It usually denotes a helicopter operated by Marine Helicopter Squadron One ( HMX-1) "Nighthawks", consisting of either the larg ...
."On Board Marine One, Presidential Fleet"
National Geographic, 2009. Retrieved 5 September 2013.
The wings on the C-5As were replaced during the 1980s to restore full design capability. The USAF took delivery of the first C-5B on 28 December 1985 and the final one in April 1989.Norton 2003, p. 58. The reliability of the C-5 fleet has been a continued issue throughout its lifetime, however the C-5M upgrade program seeks in part to address this issue. Their strategic airlift capacity has been a key logistical component of U.S. military operations in Afghanistan and Iraq. Following an incident during
Operation Iraqi Freedom {{Infobox military conflict , conflict = Iraq War {{Nobold, {{lang, ar, حرب العراق (Arabic) {{Nobold, {{lang, ku, شەڕی عێراق (Kurdish languages, Kurdish) , partof = the Iraq conflict (2003–present), I ...
where one C-5 was damaged by a projectile, the installation of defensive systems has become a stated priority. The C-5 AMP and RERP modernization programs plan to raise mission-capable rate to a minimum goal of 75%. Over the next 40 years, the U.S. Air Force estimates the C-5M will save over $20 billion.McGowan, Laura
"C-5 still going strong."
''US Air Force'', 21 June 2006.
The first C-5M conversion was completed on 16 May 2006 and C-5Ms began test flights at Dobbins Air Reserve Base in June 2006. In 2008, the USAF decided to convert remaining C-5Bs and C-5Cs into C-5Ms with avionics upgrades and re-engining.Warick, Graham
"Pentagon cancels re-engining of USAF's older Lockheed C-5s."
''FlightGlobal'', 15 February 2008.
The C-5As will receive only the avionics upgrades. The last of 52 C-5Ms was delivered to Air Mobility Command in August 2018. In response to Air Force plans to retire older C-5 aircraft, Congress implemented legislation that set limits on retirement plans for C-5As in 2003. As of November 2013, 45 C-5As have been retired, 11 have been scrapped, parts of one (A/C 66-8306) are now a cargo load trainer at Lackland AFB, Texas and one was sent to the
Warner Robins Air Logistics Center The Warner Robins Air Logistics Complex (WR-ALC), through about 7,000 employees at Robins Air Force Base, Georgia, provides depot maintenance, engineering support and software development to major weapon systems -15, C-5, C-130, C-17 and Special ...
(WR-ALC) for tear down and inspection to evaluate structural integrity and estimate the remaining life for the fleet. The U.S. Air Force began to receive refitted C-5M aircraft in December 2008. Full production of C-5Ms began in the summer of 2009. In 2009, the Congressional ban on the retirement of C-5s was overturned. The Air Force seeks to retire one C-5A for every 10 new C-17s ordered. In October 2011, the
445th Airlift Wing The 445th Airlift Wing is an Air Reserve Component of the United States Air Force. It is assigned to the Fourth Air Force, Air Force Reserve Command, stationed at Wright-Patterson Air Force Base, Ohio. If mobilized, the wing is gained by the Air ...
based at Wright-Patterson Air Force Base replaced all remaining C-5s with C-17s. The C-5M reached initial operating capability (IOC) on 24 February 2014 with 16 aircraft delivered. On 13 September 2009, a C-5M set 41 new records and flight data was submitted to the National Aeronautic Association for formal recognition. The C-5M had carried a payload of to over in 23 minutes, 59 seconds. Additionally, 33 time to climb records at various payload classes were set, and the world record for greatest payload to was broken. The aircraft was in the category of with a takeoff weight of including payload, fuel, and other equipment. On 18 July 2017, C-5s based at Dover were ordered to stand down so maintenance crews could determine the cause for some nose landing gear failing. The last TF39-powered C-5 flew in late 2017.


Variants


C-5A

The C-5A is the original version of the C-5. From 1969 to 1973, 81 C-5As were delivered to the Military Airlift Command of the U.S. Air Force. Due to cracks found in the wings in the mid-1970s, the cargo weight was restricted. To restore the C-5's full capability, the wing structure was redesigned. A program to install new strengthened wings on 77 C-5As was conducted from 1981 to 1987. The redesigned wing made use of a new
aluminum alloy An aluminium alloy (or aluminum alloy; see spelling differences) is an alloy in which aluminium (Al) is the predominant metal. The typical alloying elements are copper, magnesium, manganese, silicon, tin, nickel and zinc. There are two principal ...
that did not exist during the original production. As of August 2016, there were 10 A-models in service flown by the Air Force Reserve Command's 433d Airlift Wing at Lackland AFB / Kelly Field, Texas, and 439th Airlift Wing at Westover ARB, Massachusetts. The last operational C-5A was retired on 7 September 2017.


C-5B

The C-5B is an improved version of the C-5A. It incorporated all modifications and improvements made to the C-5A with improved wings, simplified landing gear, upgraded TF-39-GE-1C turbofan engines and updated avionics. Fifty examples of the new variant were delivered to the U.S. Air Force from 1986 to 1989.


C-5C

The C-5C is a specially modified variant for transporting large cargo. Two C-5As (68-0213 and 68-0216) were modified following major accidents to have a larger internal cargo capacity to accommodate large payloads, such as satellites. The major modifications were the removal of the rear passenger compartment floor, splitting the rear cargo door in the middle, and installing a new movable aft bulkhead further to the rear.Norton 2003, pp. 62, 78. The official C-5 technical manual refers to the version as C-5A(SCM) ''Space Cargo Modified''. Modifications also included adding a second inlet for ground power, which can feed any power-dependent equipment that may form part of the cargo. The two C-5Cs are operated by U.S. Air Force crews for DOD spacecraft programs and NASA, and are stationed at Travis AFB, California. Both C-5Cs #68-0213 and #68-0216 have been modified into C-5Ms as of 2017.


C-5 AMP and C-5M Super Galaxy

Following a study showing that 80% of the C-5 airframe's service life was remaining,Jablonski, David A
"Air Force Fleet Viability Board releases C-5A assessment"
''Air Force Print News'', 15 July 2004.
Air Mobility Command Air Mobility Command (AMC) is a major command (MAJCOM) of the U.S. Air Force. It is headquartered at Scott Air Force Base, Illinois, east of St. Louis, Missouri. Air Mobility Command was established on 1 June 1992, and was formed from elements ...
(AMC) began an aggressive program to modernize all remaining C-5Bs and C-5Cs and many of the C-5As. The C-5 Avionics Modernization Program (AMP) began in 1998 and includes upgrading the avionics to comply with
Global Air Traffic Management {{Unreferenced, date=December 2009 Global air-traffic management (GATM) is a concept for satellite-based Communication, navigation and surveillance and air traffic management. The Federal Aviation Administration and the International Civil Aviation ...
standards, improving communications, fitting new flat-panel displays, improving navigation and safety equipment, and installing a new autopilot system. The first flight of a C-5 with AMP (85-0004) occurred on 21 December 2002. The Reliability Enhancement and Re-engining Program (RERP) began in 2006. It includes fitting new General Electric F138-GE-100 (CF6-80C2) engines, pylons and auxiliary power units, and upgrades to aircraft skin and frame, landing gear, cockpit and pressurization systems. Each CF6 engine produces 22% more thrust (), providing a 30% shorter takeoff, a 38% higher climb rate to initial altitude, an increased cargo load and a longer range."Lockheed Martin C-5M 'Super Galaxy' Expands U.S. Air Force 'Global Reach' Capability at Lower Cost"
. Lockheed Martin, 16 May 2006.
Upgraded C-5s are designated ''C-5M Super Galaxy''."Second C-5M Super Galaxy takes flight"
U.S. Air Force, 20 November 2006.


L-500

Lockheed also planned a civilian version of the C-5 Galaxy, the ''L-500'', the company designation also used for the C-5 itself. Both passenger and cargo versions of the L-500 were designed. The all-passenger version would have been able to carry up to 1,000 travelers, while the all-cargo version was predicted to be able to carry typical C-5 volume for as little as 2 cents per ton-mile (in 1967 dollars). Although some interest was expressed by carriers, no orders were placed for either L-500 version, due to operational costs caused by low fuel efficiency, a significant concern for a profit-making carrier, even before the oil crisis of the 1970s, keen competition from Boeing's 747, and high costs incurred by Lockheed in developing the C-5, and later the
L-1011 The Lockheed L-1011 TriStar, also known as the L-1011 (pronounced "El-ten-eleven") and TriStar, is an American medium-to-long-range, wide-body trijet airliner built by the Lockheed Corporation. It was the third wide-body airliner to enter comme ...
, which led to the governmental rescue of the company.


C-5 Shuttle Carrier

Lockheed proposed a twin body C-5 as a Shuttle Carrier Aircraft to counter the
Conroy Virtus The Conroy Virtus was a proposed American large transport aircraft intended to carry the Space Shuttle. Designed, beginning in 1974, by John M. Conroy of the Turbo-Three Corporation, it was to incorporate a pair of Boeing B-52 Stratofortress f ...
, but the design was turned down in favor of the
Boeing 747 The Boeing 747 is a large, long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2022. After introducing the 707 in October 1958, Pan Am wanted a jet times its size, t ...
.


Operators

; '' United States Air Force'' – 52 C-5Ms in service as of August 2018
Air Mobility Command Air Mobility Command (AMC) is a major command (MAJCOM) of the U.S. Air Force. It is headquartered at Scott Air Force Base, Illinois, east of St. Louis, Missouri. Air Mobility Command was established on 1 June 1992, and was formed from elements ...
* 60th Air Mobility WingTravis Air Force Base, California ::
22nd Airlift Squadron The 22nd Airlift Squadron, sometimes written as 22d Airlift Squadron, is part of the 60th Air Mobility Wing at Travis Air Force Base, California. It operates C-5M Galaxy aircraft supporting the United States Air Force global reach mission world ...
, 1972–present *
436th Airlift Wing The 436th Airlift Wing is an active United States Air Force unit. It is assigned to Air Mobility Command's Eighteenth Air Force, and is based at Dover Air Force Base, Delaware. Known as the "Eagle Wing", the 436th consists of the operations, ...
Dover Air Force Base, Delaware :: 9th Airlift Squadron, 1971–present
Air Force Reserve Command The Air Force Reserve Command (AFRC) is a major command (MAJCOM) of the United States Air Force, with its headquarters at Robins Air Force Base, Georgia. It is the federal Air Reserve Component (ARC) of the U.S. Air Force, consisting of commiss ...
*
349th Air Mobility Wing The '349th Air Mobility Wing'' is an Air Reserve Component of the United States Air Force. It is assigned to the Fourth Air Force, Air Force Reserve Command, stationed at Travis Air Force Base, California. The 349th AMW is an associate unit of ...
(Associate) – Travis Air Force Base, California ::
312th Airlift Squadron The 312th Airlift Squadron is a United States Air Force Reserve squadron, assigned to the 349th Operations Group, stationed at Travis Air Force Base, California. It is an associate unit of the active duty 22d Airlift Squadron, 60th Air Mobil ...
, 1973–present *
413th Flight Test Group The 413th Flight Test Group (413 FTG) is a United States Air Force Air Force Reserve Command unit. It is stationed at Robins Air Force Base, Georgia as a tenant unit. The 413 FTG conducts flight tests on aircraft after the programmed depot ma ...
Robins AFB Robins Air Force Base is a major United States Air Force installation located in Houston County, Georgia, United States. The base is located just east of the city of Warner Robins, south-southeast of Macon and approximately south-southeast ...
, Georgia ::
339th Flight Test Squadron The 339th Flight Test Squadron is a United States Air Force unit based at Robins Air Force Base, Georgia. It is part of the Warner Robins Air Logistics Center, with a mission to certify aircraft as worthy to return to service. The squadron ...
, 1998–present *
433d Airlift Wing The 433rd Airlift Wing, sometimes written as 433d Airlift Wing, (433 AW) is an Air Reserve component of the United States Air Force. It is assigned to Fourth Air Force, Air Force Reserve Command, stationed at Kelly Field Annex, Joint Base San Ant ...
Kelly Field Annex, Texas ::
68th Airlift Squadron The 68th Airlift Squadron is a United States Air Force Reserve squadron, assigned to the 433d Operations Group, stationed at Kelly Field Annex, Joint Base San Antonio, Texas. The squadron operates Lockheed C-5M Super Galaxy aircraft providing g ...
, 1985–present ::
356th Airlift Squadron The 356th Airlift Squadron is a United States Air Force Reserve squadron, assigned to the 433d Operations Group Air Force Reserve Command, stationed at Kelly Field Annex, Joint Base San Antonio, Texas. The 356th is a C-5M Super Galaxy Formal T ...
, 2007–present *
439th Airlift Wing The 439th Airlift Wing (439 AW) is an active United States Air Force Reserve unit. It is assigned to the Air Force Reserve Command, Fourth Air Force, and is based at Westover Air Reserve Base, Massachusetts. The peacetime mission includes recr ...
Westover Air Reserve Base, Massachusetts ::
337th Airlift Squadron The 337th Airlift Squadron is a United States Air Force Reserve squadron, part of the 439th Airlift Wing at Westover Air Reserve Base, Massachusetts. It operates C-5M Super Galaxy aircraft supporting the United States Air Force global reach mis ...
, 1987–present *
512th Airlift Wing The 512th Airlift Wing, an associate Air Force Reserve Command unit is located at Dover Air Force Base, Delaware. The wing helps maintain, repair and fly the same aircraft as its active-duty counterparts. Members of the 512th work side-by-side w ...
(Associate) – Dover Air Force Base, Delaware ::
709th Airlift Squadron The 709th Airlift Squadron is part of the 512th Airlift Wing at Dover Air Force Base, Delaware. The squadron was first activated during World War II as the 709th Bombardment Squadron. After training in the United States, it deployed to the Eur ...
, 1973–present


Former operators

Military Airlift Command/
Air Mobility Command Air Mobility Command (AMC) is a major command (MAJCOM) of the U.S. Air Force. It is headquartered at Scott Air Force Base, Illinois, east of St. Louis, Missouri. Air Mobility Command was established on 1 June 1992, and was formed from elements ...
*60th Military Airlift Wing/Air Mobility Wing – Travis Air Force Base, California ::
21st Airlift Squadron The 21st Airlift Squadron is part of the 60th Air Mobility Wing at Travis Air Force Base, California. It operates C-17 Globemaster III aircraft carrying out United States Air Force global transport missions, duties which involve airlift and ai ...
, 1993–2006 ::75th Military Airlift Squadron, 1970–1992 *436th Military Airlift Wing/Airlift Wing – Dover Air Force Base, Delaware ::3d Military Airlift Squadron/Airlift Squadron, 1973–2007 ::31st Military Airlift Squadron/Airlift Squadron, 1989–1994 *437th Military Airlift Wing –
Charleston Air Force Base Charleston Air Force Base is a United States military facility located in the City of North Charleston, South Carolina. The facility is under the jurisdiction of the United States Air Force's 628th Air Base Wing (628 ABW), a subordinate element ...
, South Carolina ::3d Military Airlift Squadron, 1970–1973 *443d Military Airlift Wing – Altus Air Force Base, Oklahoma ::56th Military Airlift Squadron, 1969–1992 * 97th Air Mobility Wing – Altus AFB, Oklahoma ::56th Military Airlift/ 56th Airlift Squadron, 1992–2007
Air Force Reserve The Air Force Reserve Command (AFRC) is a MAJCOM, major command (MAJCOM) of the United States Air Force, with its headquarters at Robins Air Force Base, Georgia. It is the federal Air Reserve Component (ARC) of the U.S. Air Force, consisting of ...
*349th Military Airlift Wing/Air Mobility Wing (Associate) – Travis Air Force Base, California ::301st Military Airlift Squadron/Airlift Squadron, 1973–2006 *445th Military Airlift Wing/
445th Airlift Wing The 445th Airlift Wing is an Air Reserve Component of the United States Air Force. It is assigned to the Fourth Air Force, Air Force Reserve Command, stationed at Wright-Patterson Air Force Base, Ohio. If mobilized, the wing is gained by the Air ...
Wright-Patterson AFB Wright-Patterson Air Force Base (WPAFB) is a United States Air Force base and census-designated place just east of Dayton, Ohio, in Greene and Montgomery counties. It includes both Wright and Patterson Fields, which were originally Wilbur Wri ...
, Ohio ::89th Airlift Squadron, 2006–2012 *512th Military Airlift Wing/Airlift Wing(Associate) – Dover Air Force Base, Delaware ::326th Military Airlift Squadron/Airlift Squadron, 1973–2007
Air National Guard The Air National Guard (ANG), also known as the Air Guard, is a federal military reserve force of the United States Air Force, as well as the air militia of each U.S. state, the District of Columbia, the Commonwealth of Puerto Rico, and the ter ...
*105th Military Airlift Group/Military Airlift Wing/Airlift Wing –
Stewart ANGB Stewart Air National Guard Base, located in Orange County, New York, is the base of the 105th Airlift Wing (105 AW), an Air Mobility Command unit of the New York Air National Guard and "host" wing for the installation. The airport also hosts ...
, New York ::137th Military Airlift Squadron/Airlift Squadron, 1985–2012 *164th Military Airlift Wing/Airlift Wing – Memphis, Tennessee ::155th Military Airlift Squadron/Airlift Squadron, 2004–2013 *167th Military Airlift Wing/
167th Airlift Wing The 167th Airlift Wing (167 AW) is a unit of the West Virginia Air National Guard, stationed at Shepherd Field Air National Guard Base, Martinsburg, West Virginia. If activated to federal service, the Wing is gained by the United States Air Forc ...
Martinsburg, West Virginia ::167th Military Airlift/
167th Airlift Squadron The 167th Airlift Squadron (167 AS) is a unit of the West Virginia Air National Guard 167th Airlift Wing located at Shepherd Field Air National Guard Base, Martinsburg, West Virginia. It is equipped with the C-17 Globemaster III, heavy airlifter. ...
, 2006–2015


Incidents and accidents

Three C-5 Galaxy aircraft have been lost in crashes along with two class-A losses resulting from ground fire, with a combined total of 169 fatalities. At least two other C-5 crashes have resulted in major airframe damage, but the aircraft were repaired and returned to service.


Notable accidents

* On 27 May 1970, C-5A AF Serial No. 67-0172 was destroyed during a ground fire at
Palmdale, California Palmdale is a city in northern Los Angeles County in the U.S. state of California. The city lies in the Antelope Valley region of Southern California. The San Gabriel Mountains separate Palmdale from the Los Angeles Basin to the south. On Aug ...
, after an Air Turbine Motor started backwards and quickly overheated, setting the hydraulic system on fire and consuming the aircraft. The engines were not running at the time of the fire. Five crew escaped, and seven firefighters suffered minor injuries fighting the blaze."C-5 crash doesn't diminish historian's view of aircraft."
''US Air Force'', 4 April 2006.
* On 17 October 1970, C-5A AF Serial No. 66-8303 was destroyed during a ground fire at the Lockheed Aircraft plant at Dobbins AFB in Marietta, Georgia. The fire started during maintenance in one of the aircraft's 12 fuel cells. One worker was killed and another injured. This was the first C-5 aircraft produced. * On 27 September 1974, C-5A Serial No. 68-0227 crashed after over-running the runway at Clinton, Oklahoma, Municipal Airport during an emergency landing following a serious landing gear fire. The crew mistakenly aligned the aircraft for the visual approach into the wrong airport, landing at Clinton Municipal Airport, which has a runway, instead of the airfield at Clinton-Sherman Industrial Airpark (former Clinton-Sherman Air Force Base), which has a runway. This was the first operational loss of a C-5 Galaxy. * On 4 April 1975, C-5A Serial No.68-0218
crashed "Crashed" is the third U.S. rock single, (the fifth overall), from the band Daughtry's debut album. It was released only to U.S. rock stations on September 5, 2007. Upon its release the song got adds at those stations, along with some Alternativ ...
while carrying orphans out of Vietnam during
Operation Babylift Operation or Operations may refer to: Arts, entertainment and media * ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * ''Operations'' (magazine), Multi-Ma ...
. This accident is one of the most notorious C-5 accidents to date. The crash occurred while trying to make an emergency landing at Tan Son Nhut Air Base,
Saigon , population_density_km2 = 4,292 , population_density_metro_km2 = 697.2 , population_demonym = Saigonese , blank_name = GRP (Nominal) , blank_info = 2019 , blank1_name = – Total , blank1_ ...
, following a rear pressure door lock failure in flight. 144 people (including 78 children) were killed out of the 313 aboard (243 children, 44 escorts, 16 flight crew and 10 medical crew). Use of the C-5 was heavily restricted for several months following the high-profile accident. * On 31 July 1983, C-5A Serial No. 70-0446 crashed while landing at the former
Shemya Air Force Base Eareckson Air Station , formerly Shemya Air Force Base, is a United States Air Force military airport located on the island of Shemya, in the Alaskan Aleutian Islands. The airport was closed as an active Air Force Station on 1 July 1994. Howev ...
on Shemya Island in Alaska. The C-5 approached below the glide slope in heavy fog, hit landing light poles and an embankment short of the runway, stopping at the 5,000-foot mark on the runway with the nose gear at the side of the runway embankment. Structural damage was extensive and the two aft main landing gear bogies were sheared from the aircraft. There were no fatalities. A joint USAF–Lockheed team made repairs, enabling a ferry flight from Shemya to the Lockheed plant in Marietta, Georgia, later that year. There, the aircraft was dubbed ''Phoenix II'' and permanent repair efforts got under way. In addition to the structural repairs, the aircraft also received an improved landing gear system (common to the then-new C-5B), wing modification, and a color weather radar upgrade. The aircraft was returned to service.Lippincott 2006, p. 35. * In July 1983, C-5A Serial No. 68-0216 landed gear up at Travis Air Force Base, California. There were no injuries. The accident occurred while the crew was performing touch-and-go landings, and did not lower the landing gear during the final approach of the day. The aircraft received significant damage to the lower fuselage, ramp, clamshell doors, and main landing gear pods. The C-5A was later flown to Marietta for repairs. While there, the aircraft was selected to be the first C-5A converted to the C-5C configuration.Lippincott 2006, p. 28. * On 29 August 1990, C-5A Serial No. 68-0228 crashed following an engine failure shortly after take-off. The aircraft took off from
Ramstein Air Base Ramstein Air Base or Ramstein AB is a United States Air Force base in Rhineland-Palatinate, a state in southwestern Germany. It serves as headquarters for the United States Air Forces in Europe – Air Forces Africa (USAFE-AFAFRICA) and also ...
in Germany in support of Operation Desert Shield. It was flown by a nine-member reserve crew from the
68th Airlift Squadron The 68th Airlift Squadron is a United States Air Force Reserve squadron, assigned to the 433d Operations Group, stationed at Kelly Field Annex, Joint Base San Antonio, Texas. The squadron operates Lockheed C-5M Super Galaxy aircraft providing g ...
,
433d Airlift Wing The 433rd Airlift Wing, sometimes written as 433d Airlift Wing, (433 AW) is an Air Reserve component of the United States Air Force. It is assigned to Fourth Air Force, Air Force Reserve Command, stationed at Kelly Field Annex, Joint Base San Ant ...
based at Kelly AFB, Texas. As the aircraft started to climb off the runway, one of the
thrust reversers Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine's thrust for it to act against the forward travel of the aircraft, providing deceleration. Thrust reverser systems are featured on many jet aircraft to ...
suddenly deployed. This resulted in loss of control of the aircraft and the subsequent crash. Of the 17 people on board, only four survived the crash. All four were in the rear troop compartment. The sole crew member to survive, Staff Sgt. Lorenzo Galvan Jr., was awarded the
Airman's Medal The Airman's Medal (AmnM) is a military award and decoration of the United States Air Force and United States Space Force for personnel who distinguish themselves by heroism involving voluntary risk of their life not involving actual combat with ...
for his actions in evacuating the survivors from the wreckage. * On 3 April 2006, C-5B Serial No. 84-0059 crashed following a cockpit indication that the thrust reverser on No.2 engine was not locked. The crew shut down No.2 engine as a safeguard. The C-5B assigned to the
436th Airlift Wing The 436th Airlift Wing is an active United States Air Force unit. It is assigned to Air Mobility Command's Eighteenth Air Force, and is based at Dover Air Force Base, Delaware. Known as the "Eagle Wing", the 436th consists of the operations, ...
and flown by a reserve crew from the
709th Airlift Squadron The 709th Airlift Squadron is part of the 512th Airlift Wing at Dover Air Force Base, Delaware. The squadron was first activated during World War II as the 709th Bombardment Squadron. After training in the United States, it deployed to the Eur ...
,
512th Airlift Wing The 512th Airlift Wing, an associate Air Force Reserve Command unit is located at Dover Air Force Base, Delaware. The wing helps maintain, repair and fly the same aircraft as its active-duty counterparts. Members of the 512th work side-by-side w ...
crashed about short of the runway while attempting a heavyweight emergency landing at Dover Air Force Base, Delaware. The aircraft had taken off from Dover 21 minutes earlier and reported an in-flight emergency ten minutes into the flight. All 17 people aboard survived, but two received serious injuries. The Air Force's accident investigation board report concluded the cause to be human error, in particular the crew had been manipulating the throttle of the (dead) number-two engine as if it were still running while keeping the (live) number-three engine at idle. The situation was further worsened by the crew's decision to use a high flap setting that increased drag beyond normal two-engine capabilities. The aircraft was one of the first to receive the new avionics and glass flight displays for C-5 Avionics Modernization Program (AMP). This accident led to a redesign of the cockpit engine displays, particularly the visual indicators of a non-active engine. The aircraft was declared a total hull-loss and the airframe was scrapped, but the forward fuselage became a C-5 AMP test bed.Langley, Nicole
"Gone with the wings: C-5 removal process in full swing."
''US Air Force'', 19 January 2007.


Aircraft on display

* C-5A, AF Ser. No. 70-0451, has been delivered to the
Travis Air Force Base Heritage Center The Travis Air Force Base Aviation Museum (former names include Travis Air Museum, Jimmy Doolittle Air & Space Museum, and Travis Air Force Base Heritage Center) is an aviation museum located at Travis Air Force Base in Fairfield, California. The ...
at Travis Air Force Base for future display. This is the penultimate operational C-5A, with the last operational C-5A delivered to Davis-Monthan Air Force Base for spare parts. * C-5A, AF Ser. No. 69-0014, is on display at the Air Mobility Command Museum at Dover Air Force Base, Delaware. This is the first C-5 aircraft to go on museum display.


Specifications (C-5M)


See also


References


Notes


Citations


Bibliography

* ''Aging of U.S. Air Force Aircraft: Final Report''. Washington, D.C.: National Research Council, National Academies, 1997. * Bakse, Colin
''Airlift Tanker: History of U.S. Airlift and Tanker Forces.''
New York: Turner Publishing, 1995. . * Chant, Christopher. ''Air War in the Gulf 1991''. Oxford, UK: Osprey Publishing, 2001. . * Dunstan, Simon. ''The Yom Kippur War: the Arab-Israeli War of 1973''. Oxford, UK: Osprey Publishing, 2007. . * "The Giants of Georgia". ''
Air International ''AIR International'' is a British aviation magazine covering current defence aerospace and civil aviation topics. It has been in publication since 1971 and is currently published by Key Publishing Ltd. History and profile The magazine was fir ...
'', Vol. 26, No. 2, February 1984, pp. 61–68, 87–90. . * Government Accountability Office. ''Military Readiness: DOD Needs to Identify and Address Gaps and Potential Risks in Program Strategies and Funding Priorities for Selected Equipment.'' Darby, Pennsylvania: DIANE Publishing, 2006. .
''Improving Strategic Mobility: The C-17 Program and Alternatives.''
Washington, D.C.: Congressional Budget Office, United States Congress, September 1986. . * Irving, Clive. ''Wide Body: The Triumph of the 747''. New York: W. Morrow, 1993. . * Jenkins, Dannis J. ''Lockheed Secret Projects: Inside the Skunk Works''. St. Paul, Minnesota: Zenith Imprint, 2001. . * Miller, David. ''Conflict Iraq: Weapons and Tactics of the US and Iraqi Forces''. St. Paul, Minnesota: Zenith Imprint, 2003. . * Nalty, Bernard C. ''Winged Shield, Winged Sword 1950–1997: A History of the United States Air Force''. Minerva Group, 2003. . * Lippincott, Richard. ''C-5 Galaxy in Action''. Carrollton, Texas: Squadron/Signal Publications, 2006. . * Norton, Bill. ''Lockheed Martin C-5 Galaxy''. North Branch, Minnesota: Specialty Press, 2003. . * Philips, Warren F. ''Mechanics of Flight''. Hoboken, New Jersey: John Wiley and Sons, 2004. . * Reed, Chris. ''Lockheed C-5 Galaxy''. Atglen, Pennsylvania: Schiffer Publishing, 2000. . * * Tillman, Barrett
''What We Need: Extravagance and Shortages in America's Military''.
Zenith Imprint, 2007. ISBN −076032-869-2. * Veronico, Nick and Jim Dunn. ''21st Century U.S. Air Power''. St. Paul, Minnesota: Zenith Imprint, 2004. .


External links


C-5 A/B/C Galaxy and C-5M Super Galaxy U.S. Air Force fact sheet





"Fatigue and Related Human Factors in the Near Crash of a Large Military Aircraft"
''
Aviation, Space, and Environmental Medicine ''Aerospace Medicine and Human Performance'' (''AMHP'') is a peer-reviewed scientific journal in the field of aviation and aerospace medicine. It was founded as the ''Journal of Aviation Medicine'' in 1930 by Louis H. Bauer, M.D., and is publishe ...
'', Volume 77, Number 9, September 2006, pp. 963–970.
C5 wing vortex study
(NASA video) {{Authority control C-005 Galaxy 1960s United States military transport aircraft Quadjets High-wing aircraft T-tail aircraft Aircraft first flown in 1968