Lockheed C-130 Hercules
|Role||Military transport aircraft|
|National origin||United States|
|First flight||23 August 1954|
|Introduction||9 December 1956|
United States Air Force
United States Marine Corps
Royal Air Force
Royal Canadian Air Force
|Number built||Over 2,300 as of 2009|
C-130H $30.1 million
Lockheed Martin KC-130
Lockheed L-100 Hercules
|Developed into||Lockheed Martin C-130J Super Hercules|
The Lockheed C-130 Hercules is a four-engine turboprop military transport aircraft designed and built originally by Lockheed, now Lockheed Martin. Capable of using unprepared runways for takeoffs and landings, the C-130 was originally designed as a troop, medical evacuation, and cargo transport aircraft. The versatile airframe has found uses in a variety of other roles, including as a gunship (AC-130), for airborne assault, search and rescue, scientific research support, weather reconnaissance, aerial refueling, maritime patrol, and aerial firefighting. It is now the main tactical airlifter for many military forces worldwide. Over 40 models and variants of the Hercules serve with more than 60 nations.
The C-130 entered service with U.S. in the 1950s, followed by Australia and others. During its years of service, the Hercules family has participated in numerous military, civilian and humanitarian aid operations. The family has the longest continuous production run of any military aircraft in history. In 2007, the C-130 became the fifth aircraft—after the English Electric Canberra, Boeing B-52 Stratofortress, Tupolev Tu-95, and Boeing KC-135 Stratotanker, all designs with various forms of aviation gas turbine powerplants—to mark 50 years of continuous use with its original primary customer, in this case, the United States Air Force. The C-130 is one of the only military aircraft to remain in continuous production for over 50 years with its original customer, as the updated C-130J Super Hercules.
Design and development 1
- Background and requirements 1.1
- Into production 1.2
- Improved versions 1.3
- Refueling versions 1.4
- More improvements 1.5
- Later models 1.6
- Next generation 1.7
- Upgrades and changes 1.8
- Replacement 1.9
Operational history 2
- Military 2.1
- Civilian 2.2
- Variants 3
- Operators 4
- Accidents 5
Aircraft on display 6
- Australia 6.1
- Canada 6.2
- Colombia 6.3
- Norway 6.4
- Saudi Arabia 6.5
- United Kingdom 6.6
- United States 6.7
- Specifications (C-130H) 7
- See also 8
- References 9
- External links 10
Design and development
Background and requirements
The Korean War, which began in June 1950, showed that World War II-era piston-engine transports—Fairchild C-119 Flying Boxcars, Douglas C-47 Skytrains and Curtiss C-46 Commandos—were inadequate for modern warfare. Thus, on 2 February 1951, the United States Air Force issued a General Operating Requirement (GOR) for a new transport to Boeing, Douglas, Fairchild, Lockheed, Martin, Chase Aircraft, North American, Northrop, and Airlifts Inc. The new transport would have a capacity of 92 passengers, 72 combat troops or 64 paratroopers in a cargo compartment that was approximately 41 feet (12 m) long, 9 feet (2.7 m) high, and 10 feet (3.0 m) wide. Unlike transports derived from passenger airliners, it was to be designed from the ground-up as a combat transport with loading from a hinged loading ramp at the rear of the fuselage. This innovation for military cargo aircraft was first pioneered, known as the Trapoklappe, on the World War II German Junkers Ju 252 and Junkers Ju 352 "Hercules" transport prototypes.
The Hercules resembled a larger four-engine brother to the C-123 Provider with a similar wing and cargo ramp layout that evolved from the Chase XCG-20 Avitruc, which in turn, was first designed and flown as a cargo glider in 1947. The Boeing C-97 Stratofreighter also had a rear ramp, which made it possible to drive vehicles onto the plane (also possible with forward ramp on a C-124). The ramp on the Hercules was also used to airdrop cargo, which included low-altitude extraction for Sheridan tanks and even dropping large improvised "daisy cutter" bombs.
A key feature was the introduction of the Allison T56 turboprop powerplant, first developed specifically for the C-130. At the time, the turboprop was a new application of turbine engines that used exhaust gases to turn a propeller, which offered greater range at propeller-driven speeds compared to pure turbojets, which were faster but thirstier. As was the case on helicopters of that era, such as the UH-1 Huey, turboshafts produced much more power for their weight than piston engines. Lockheed would subsequently use the same engines and technology in the Lockheed L-188 Electra. That aircraft failed financially in its civilian configuration but was successfully adapted into the Lockheed P-3 Orion maritime patrol and submarine attack aircraft where the efficiency and endurance of turboprops excelled.
The new Lockheed cargo plane design possessed a range of 1,100 nmi (1,300 mi; 2,000 km), takeoff capability from short and unprepared strips, and the ability to fly with one engine shut down. Fairchild, North American, Martin, and Northrop declined to participate. The remaining five companies tendered a total of ten designs: Lockheed two, Boeing one, Chase three, Douglas three, and Airlifts Inc. one. The contest was a close affair between the lighter of the two Lockheed (preliminary project designation L-206) proposals and a four-turboprop Douglas design.
The Lockheed design team was led by Willis Hawkins, starting with a 130 page proposal for the Lockheed L-206. Hall Hibbard, Lockheed vice president and chief engineer, saw the proposal and directed it to Kelly Johnson, who did not care for the low-speed, unarmed aircraft, and remarked, "If you sign that letter, you will destroy the Lockheed Company." Both Hibbard and Johnson signed the proposal and the company won the contract for the now-designated Model 82 on 2 July 1951.
The first flight of the YC-130 prototype was made on 23 August 1954 from the Lockheed plant in Burbank, California. The aircraft, serial number 53-3397, was the second prototype, but the first of the two to fly. The YC-130 was piloted by Stanley Beltz and Roy Wimmer on its 61-minute flight to Edwards Air Force Base; Jack Real and Dick Stanton served as flight engineers. Kelly Johnson flew chase in a Lockheed P2V Neptune.
After the two prototypes were completed, production began in
- The short film STAFF FILM REPORT 66-12A (1966) is available for free download at the Internet Archive 
- C-130J Hercules Tactical Transport Aircraft USA Images
- "Herculean Transport" a 1954 Flight article
- C-130 Hercules USAF fact sheet
- C-130 U.S. Navy fact file and C-130 history page on Navy.mil
- C-130 page on Globalsecurity.org
- C-130 page on amcmuseum.org
- C-130 takes off and lands on a Carrier USS Forrestal on YouTube
- Newsreel footage from 1955 of blunt nose Hercules prototype (1955) courtesy of British Pathe (Record No:63598) at YouTube
- Borman, Martin W. Lockheed C-130 Hercules. Marlborough, UK: Crowood Press, 1999. ISBN 978-1-86126-205-9.
- Diehl, Alan E., PhD, Former Senior USAF Safety Scientist. Silent Knights: Blowing the Whistle on Military Accidents and Their Cover-ups. Dulles, Virginia: Brassey's Inc., 2002. ISBN 1-57488-544-8.
- Donald, David, ed. "Lockheed C-130 Hercules". The Complete Encyclopedia of World Aircraft. New York: Barnes & Noble Books, 1997. ISBN 0-7607-0592-5.
- Eden, Paul. "Lockheed C-130 Hercules". Encyclopedia of Modern Military Aircraft. London: Amber Books, 2004. ISBN 1-904687-84-9.
- Frawley, Gerard. The International Directory of Military Aircraft, 2002/03. Fyshwick, ACT, Australia: Aerospace Publications Pty Ltd, 2002. ISBN 1-875671-55-2.
- Olausson, Lars. Lockheed Hercules Production List 1954–2011. Såtenäs, Sweden: Self-published, 27th Edition March 2009. No ISBN.
- Olausson, Lars. Lockheed Hercules Production List 1954–2012. Såtenäs, Sweden: Self-published, 28th Edition, March 2010. No ISBN.
- Reed, Chris. Lockheed C-130 Hercules and Its Variants. Atglen, Pennsylvania: Schiffer Publishing, 1999. ISBN 978-0-7643-0722-5.
- This article incorporates public domain material from the United States Air Force document "Fact Sheet: Lockheed C-130E Hercules".
- "Chase XCG-20 Avitruc." globalsecurity.org. Retrieved: 2 October 2010.
- Rhodes, Jeff. "Willis Hawkins and the Genesis of the Hercules." Code One Magazine, Volume 19, Issue 3, 2004.
- Boyne, Walter J. Beyond the Horizons: The Lockheed Story. New York: St. Martin's Press, 1998. ISBN 978-0-312-19237-2.
- Dabney, Joseph E. A. "Mating of the Jeep, the Truck, and the Airplane." lockheedmartin.com, 2004.Excerpted from HERK: Hero of the Skies in Lockheed Martin Service News, Lockheed Martin Air Mobility Support Volume 29, Issue 2, p. 3.
- Olausson 2009, p. 129.
- "C-130K in the Austrian Air Force." doppeladler.com. Retrieved: 2 October 2010.
- NASA and Lockheed Martin Partners In C-130 Technology Retrieved 21 May 2013.
- The High Technology Test Bed Lockheed Service News Vol. 12 No. 3, September 1985. Retrieved 21 May 2013.
- Norton, Bill (2002). STOL Progenitors: The Technology Path to a Large STOL Aircraft and the C-17A. Reston, Virginia: American Institute of Aeronautics and Astronautics.
- ASN Aircraft Accident Retrieved 21 May 2013.
- Lockheed Unveils Two Future C-130 Variants
- Trimble, Stephen. "Boeing outlines C-130H and KC-10 cockpit upgrades." Flightglobal. Retrieved: 2 October 2010.
- Capaccio, Tony. "Air Force Would Cancel Boeing C-130 Upgrade, 15 Other Programs." Bloomberg, 2 September 2009. Retrieved 2 October 2010.
- Wall, Robert. "Pentagon Approves C-130 AMP Production." Aviation Week, 25 June 2010.
- "Boeing C-130 Avionics Modernization Program to Enter Production." Boeing, 24 June 2010.
- "NOAA 'Hurricane Hunters' First To Get T56 Series 3.5 Engine Enhancement" Aero News, November 14, 2013. Accessed: December 1, 2013.
- USAF asks industry to answer C-130 replacement questions - Flightglobal.com, 22 October 2010
- Lockheed’s stealth C-130 successor revealed - Flightglobal.com, 13 September 2011
- Fast STOL - Lockheed's Speed Agile - Aviationweek.com, 15 October 2010
- Lockheed’s New STOL Airlifter Design - Defensetech.org, 15 September 2011
- Boeing awarded patent for Speed Agile stealth transport concept - Flightglobal.com, 2 April 2013
- Requirements Mulled for Next-Generation Airlifter - Airforcemag.com, 2 January 2014
- "The Shootdown of Flight 60528." National Vigilance Park- NSA/CSS via nsa.gov, 12 January 2009. Retrieved 11 March 2011.
- "Canadian Military Aircraft". Retrieved 6 September 2013.
- "C-130 Hercules on Aircraft carrier." Defence Aviation, 2 May 2007. Retrieved 2 October 2010.
- "USS Forrestal (CV 59)." navysite.de (Unofficial U.S. Navy site). Retrieved: 2 October 2010.
- Odom, Maj. T. "Dragon Operations: Hostage Rescues in the Congo, 1964–1965." Combat Studies Institute, January 2009. Retrieved 2 October 2010.
- Pocock, Chris. The Black Bats: CIA Spy Flights over China from Taiwan 1951–1969. Atglen, Ennsylvania: Schiffer Military History, 2010. ISBN 978-0-7643-3513-6.
- Leeker, Dr. Joe. "Air America: Lockheed C-130 Hercules." The University of Texas at Dallas. 23 August 2010. Retrieved 29 January 2012.
- Baugher, Joe 1964 USAF Serial Numbers Retrieved: 29 January 2012.
- Olausson 2010, p. 5.
- McCullough, Amy. "Abort Launch: Air shows to do without Fat Albert’s famed JATO." Marine Corps Times, 9 November 2009. Retrieved 20 November 2009.
- "AFSOC Heritage." US Air Force Special Operations Command. Retrieved: 31 July 2009.
- "Modular Airborne FireFighting Systems." U.S. Forest Service, 16 March 2010. Retrieved 2 October 2010.
- King, Capt. Vince, Jr. "Compass Call continues to 'Jam' enemy." Air Force Link, United States Air Force, 1 November 2006. Retrieved 2 October 2010.
- "Lockheed EC-130V Hercules." Military Analysis Network, Federation of American Scientists, 10 February 1998. Retrieved 2 October 2010.
- Housman, Damian. "Highly modified C-130 ready for war on terrorism." Air Force Link, United States Air Force, 29 June 2006. Retrieved 2 October 2010.
- MC-130 J name change promotes modern missions, preserves heritage. Afsoc.af.mil. Retrieved on 2013-08-16.
- "SC-130J Sea Herc". lockheedmartin.com. Lockheed Martin. Retrieved 12 June 2014.
- "Lockheed Martin’s Sea Hercules unveiled". stratpost.com. StratPost. Retrieved 12 June 2014.
- "Aircraft Air Accidents and Damage Rates." Defence Analytical Services Agency. Retrieved: 2 October 2010.
- Diehl 2002, p. 45.
- "Lockheed C-130 Hercules." Aviation Safety Network, Flight Safety Foundation, 13 November 2004. Retrieved 2 October 2010.
- "As Pakistan comes full circle, a light is shone on Zia ul-Haq's death." Times Online, 16 August 2008.
- Olausson 2010, p. 62.
- Olausson 2010, p. 73.
- Olausson 2010, p. 85.
- "Hercules makes final flight into Cosford." Royal Air Force Museum. Retrieved: 22 September 2011.
- Olausson 2010, p. 7.
- Olausson 2010, p. 11.
- Olausson 2010, p. 14.
- Olausson 2010, p. 16.
- Olausson 2010, p. 19.
- "Factsheet: Lockheed C-130E Hercules." National Museum of the United States Air Force, 29 February 2011.
- Olausson 2010, p. 30.
- Olausson 2010, p. 43.
- Olausson 2010, p. 52.
- Olausson 2010, p. 74.
- "Combat Talon Dedicated." Code One Magazine, 6 May 2011.
- Olausson 2010, p. 78.
- Olausson 2010, p. 91.
- "USAF C-130 Hercules fact sheet." USAF, October 2009.
- Frawley 2002, p. 108.
- Donald 1997
- Eden 2004
- "Lockheed C-130 Hercules Heavy Transport." aerospaceweb. Retrieved: 11 March 2011.
- "C-130 characteristics." uscost.net. Retrieved: 7 July 2009.
- "Electronic Mission Aircraft: AN/APN-241 (United States)." Jane's. Retrieved: 2 October 2010.
- The aircrew of "Spare 617" were: Capt. William Caldwell, pilot; Lt. John Hering, co-pilot; Lt. Richard A. Lenz, navigator; Tech. Sgt. Jon Sanders, flight engineer, loadmasters Tech. Sgt. Charlie Shaub and A1C Dave McAleece
- List of accidents and incidents involving the C-130 Hercules
- List of United States military aerial refueling aircraft
- Related lists
- Antonov An-12
- Armstrong Whitworth AW.660 Argosy
- Blackburn Beverley
- Shaanxi Y-8
- Short Belfast
- Transall C-160
- Aircraft of comparable role, configuration and era
- Lockheed Martin C-130J Super Hercules
- Lockheed AC-130
- Lockheed DC-130
- Lockheed EC-130
- Lockheed EC-130H Compass Call
- Lockheed HC-130
- Lockheed Martin KC-130
- Lockheed LC-130
- Lockheed MC-130
- Lockheed WC-130
- Lockheed L-100 Hercules
- Related development
- Westinghouse Electronic Systems (now Northrop Grumman) AN/APN-241 weather and navigational radar
- Maximum speed: 320 knots (366 mph, 592 km/h) at 20,000 ft (6,060 m)
- Cruise speed: 292 kts (336 mph, 540 km/h)
- Range: 2,050 nmi (2,360 mi, 3,800 km)
- Service ceiling: 33,000 ft (10,060 m) empty; 23,000 ft (7,077 m) with 42,000 pounds (19,090 kilograms) payload ()
Rate of climb: 1,830 ft/min (9.3 m/s)
- Takeoff distance: 3,586 ft (1,093 m) at 155,000 lb (70,300 kg) max gross weight; 1,400 ft (427 m) at 80,000 lb (36,300 kg) gross weight
- Crew: five (two pilots, navigator, flight engineer and loadmaster)
- C-130E/H/J cargo hold: length, 40 feet (12.31 meters); width, 119 inches (3.12 meters); height, 9 feet (2.74 meters). Rear ramp: length, 123 inches (3.12 meters); width, 119 inches (3.02 meters)
- C-130J-30 cargo hold: length, 55 feet (16.9 meters); width, 119 inches (3.12 meters); height, 9 feet (2.74 meters). Rear ramp: length, 123 inches (3.12 meters); width, 119 inches (3.02 meters)
- 92 passengers or
- 64 airborne troops or
- 74 litter patients with 5 medical crew or
- 6 pallets or
- 2–3 Humvees or
- 2 M113 armored personnel carriers
- Payload: 45,000 lb (20,400 kg)
- Length: 97 ft 9 in (29.8 m)
- Wingspan: 132 ft 7 in (40.4 m)
- Height: 38 ft 3 in (11.6 m)
- Wing area: 1,745 ft² (162.1 m²)
- Empty weight: 75,800 lb (34,400 kg)
- Useful load: 72,000 lb (33,000 kg)
- Max. takeoff weight: 155,000 lb (70,300 kg)
- Powerplant: 4 × Allison T56-A-15 turboprops, 4,590 shp (3,430 kW) each
Propellers: 4 propellers
- Propeller diameter: 13.5 ft (4.1 m)
Data from USAF C-130 Hercules fact sheet, International Directory of Military Aircraft, Complete Encyclopedia of World Aircraft, Encyclopedia of Modern Military Aircraft
- C-130E USAF 69-6580:was operated by the 61st TAS, 314th TAW, 317th TAW, 314th TAW, 317th TAW, 40th AS, 41st AS, 43rd AW, retired after center wing cracks were detected in April 2002; to the Air Mobility Command Museum, Dover AFB, Delaware on 2 February 2004.
- C-130E USAF 70-1269:was used by the 43rd AW and is on display at the Pope Air Park, Pope AFB, North Carolina as 2006.
- C-130H USAF 74-1686:was used by the 463rd TAW; one of three C-130H airframes modified to YMC-130H for aborted rescue attempt of Iranian hostages, 
- C-130G USMC BuNo 151891:was modified to EC-130G, 1966, then testbed for EC-130Q in 1981. To TC-130G in May 1990 and assigned as the U.S. Navy's Blue Angels support aircraft, serving as "Fat Albert Airlines" from 1991 to 2002. Retired to the National Museum of Naval Aviation at NAS Pensacola, Florida in November 2002.
- C-130E USAF 64-0525:is on display at the 82nd Airborne Division War Memorial Museum at Fort Bragg, North Carolina. The aircraft was the last assigned to the 43rd AW at Pope AFB, North Carolina prior to retirement from the USAF.
- C-130E USAF 69-6579 was operated by the 61st TAS, 314th TAW, 50th AS, 61st AS; at Dyess AFB as maintenance trainer as GC-130E, March 1998; to Dyess AFB museum, January 2004.
- MC-130E Combat Talon AFSOC 64-0567:was unofficially known as "Wild Thing". It transported captured Panamanian dictator Manuel Noriega in 1989 during Operation Just Cause, and participated in Operation Eagle Claw, the unsuccessful attempt to rescue U.S. hostages from Iran in 1980. Wild Thing was also the first fixed-wing aircraft to employ night-vision goggles. On display at Hurlburt Field, in Florida.
- NC-130B USAF 57-0526:was the second B model manufactured, initially delivered as JC-130B; assigned to 6515th Organizational Maintenance Squadron for flight testing at Edwards AFB, California on 29 November 1960; turned over to 6593rd Test Squadron's Operating Location No. 1 at Edwards AFB and spent next seven years supporting Corona Program; "J" status and prefix removed from aircraft on October 1967; transferred to 6593rd Test Squadron at Hickam AFB, Hawaii and modified for mid-air retrieval of satellites; acquired by 6514th Test Squadron at Hill AFB, Utah in Jan. 1987 and used as electronic testbed and cargo transport; aircraft retired January 1994 with 11,000+ flight hours and moved to Hill Aerospace Museum by January 1994.
- C-130E s/n 62-1787:on display at the National Museum of the United States Air Force, Wright-Patterson AFB, Ohio, was flown to the museum on 18 August 2011. One of the greatest feats of heroism during the Vietnam War involved the C-130E, call sign "Spare 617".[N 1] The C-130E attempted to airdrop ammunition to surrounded South Vietnamese forces at An Loc, Vietnam. Approaching the drop zone, Spare 617 received heavy enemy ground fire that damaged two engines, ruptured a bleed air duct in the cargo compartment, and set the ammunition on fire. Flight engineer Sanders was killed, and navigator Lenz and co-pilot Hering were both wounded. Despite receiving severe burns from hot air escaping from the damaged air bleed duct, loadmaster Shaub extinguished a fire in the cargo compartment, and successfully jettisoned the cargo pallets, which exploded in mid-air. Despite losing a third engine on final approach, pilot Capt. Caldwell landed Spare 617 safely. For their actions, Caldwell and Shaub received the Air Force Cross, the U.S. Air Force's second highest award for valor. Shaub also received the William H. Pitsenbarger Award for Heroism from the Air Force Sergeants Association.
- KC-130F USMC BuNo 149798:was used in tests in October–November 1963 by the U.S. Navy for unarrested landings and unassisted take-offs from the carrier USS Forrestal, it remains the record holder for largest aircraft to operate from a carrier flight deck, and carried the name "Look Ma, No Hook" during the tests. Retired to the National Museum of Naval Aviation, NAS Pensacola, Florida in May 2003.
- C-130A USAF 55-0037 was used by the 773 TCS, 483 TCW, 315 AD, 374 TCW, 815 TAS, 35 TAS, 109 TAS, belly-landed at Duluth, Minnesota, April 1973, repaired; 167 TAS, 180 TAS, to Chanute Technical Training Center as GC-130A, May 1984; now displayed at Octave Chanute Aerospace Museum, Rantoul Aviation Complex, Rantoul, Illinois as of November 1995.
- C-130A USAF 56-0518 was by the 314 TCW, 315 AD, 41 ATS, 328 TAS; to South Vietnamese Air Force 435 Transport Squadron, November 1972; holds the C-130 record for taking off with the most personnel on board, during evacuation of SVN, 29 April 1975, with 452. Returned to USAF, 185 TAS, 105 TAS; gate guard at Little Rock AFB Visitor Center, Arkansas by March 1993.
- C-130A USAF 57-0453:operated from 1958 to 1991, last duty with 155th TAS, 164th TAG, Tennessee Air National Guard, Memphis International Airport, Tennessee, 1976–1991, named "Nite Train to Memphis"; to AMARC in December 1991, then sent to Texas for modification into replica of C-130A-II 56-0528, shot down by Russian fighters in Soviet airspace near Maryland.
- C-130D USAF 57-0490 was used by the 61st TCS, 17th TCS, 139th TAS with skis, July 1975–April 1983; to MASDC, 1984–1985, GC-130D ground trainer, Chanute AFB, Illinois, 1986–1990; When Chanute AFB closed in September 1993, it moved to the Octave Chanute Aerospace Museum, Rantoul, Illinois. In July 1994, it moved to the Empire State Air Museum, Schenectady County Airport, New York, until placed on the gate at Stratton ANGB in October 1994.
- Hercules C3 XV202, which served with the Royal Air Force from 1967 to 2011, is on display at the Royal Air Force Museum Cosford.
- C-130H RSAF 460:was operated by 4 Squadron Royal Saudi Air Force, December 1974 until January 1987. It was damaged in a fire at Jeddah in December 1989. Restored for ground training by August 1993. At Riyadh Air Base Museum, November 2002, restored for ground display by using a tail from another C-130H.
- C-130H Royal Norwegian Air Force 953: retired 10 June 2007 and moved to the Air Force museum at Oslo Gardermoen in May 2008.
- C-130B Colombian Air Force 1011 (serial number 3585, ex 59-1535) preserved at Colombian Air and Space Museum in CATAM AFB, at El Dorado International Airport, Bogotá.
- CC-130E RCAF 10313 (later 130313) is on display at the National Air Force Museum of Canada, CFB Trenton
- C-130A RAAF A97-214 used by 36 Squadron from early 1959, withdrawn from use late 1978; now at RAAF Museum, RAAF Base Williams, Point Cook.
- C-130E RAAF A97-160 used by 37 Squadron from August 1966, withdrawn from use November 2000; to RAAF Museum, 14 November 2000, cocooned as of September 2005.
Aircraft on display
On 17 August 1988, then President of Pakistan, General Zia-ul-Haq was killed along with the then U.S. Ambassador to Pakistan, Arnold Lewis Raphel, when a Pakistan Air Force C-130 carrying them crashed soon after takeoff from Bahawalpur, Pakistan.
A total of 70 aircraft were lost by the U.S. Air Force and the U.S. Marine Corps during combat operations in the Vietnam War in Southeast Asia. By the nature of the Hercules' worldwide service, the pattern of losses provides an interesting barometer of the global hot spots over the past 50 years.
The C-130 Hercules has had a low accident rate in general. The Royal Air Force recorded an accident rate of about one aircraft loss per 250,000 flying hours over the last 40 years, placing it behind Vickers VC10s and Lockheed TriStars with no flying losses. USAF C-130A/B/E-models had an overall attrition rate of 5% as of 1989 as compared to 1-2% for commercial airliners in the U.S., according to the NTSB, 10% for B-52 bombers, and 20% for fighters (F-4, F-111), trainers (T-37, T-38), and helicopters (H-3).
- Aircrew training
- VIP transport
- Weather reconnaissance ("Hurricane Hunter") version for USAF / Air Force Reserve Command's 53d Weather Reconnaissance Squadron in support of the NOAA/National Weather Service's National Hurricane Center
- Tactical airlifter basic models
- C-130J Super Hercules
- Tactical airlifter, with new engines, avionics, and updated systems
- Designation for RAF Hercules C1/W2/C3 aircraft (C-130Js in RAF service are the Hercules C.4 and Hercules C.5)
- Gunship variants
- Ski-equipped version for snow and ice operations United States Air Force / Air National Guard
- CC-130E/H/J Hercules
- Designation for Canadian Armed Forces / Royal Canadian Air Force Hercules aircraft. U.S. Air Force used the CC-130J designation to differentiate standard C-130Js from "stretched" C-130Js (Company designation C-130J-30s).
- Drone control
- EC-130E/J Commando Solo – USAF / Air National Guard psychological operations version
- EC-130E – Airborne Battlefield Command and Control Center (ABCCC)
- EC-130E Rivet Rider – Airborne psychological warfare aircraft
- EC-130H Compass Call – Electronic warfare and electronic attack.
- EC-130V – Airborne early warning and control (AEW&C) variant used by USCG for counter-narcotics missions
- Permanently Grounded "Static Display"
- HC-130B/E/H – Early model combat search and rescue
- HC-130P/N Combat King – USAF aerial refueling tanker and combat search and rescue
- HC-130J Combat King II – Next generation combat search and rescue tanker
- HC-130H/J – USCG long-range surveillance and search and rescue
- Temporary conversion for flight test operations
- United States Marine Corps aerial refueling tanker and tactical airlifter
- USAF / Air National Guard – Ski-equipped version for Arctic and Antarctic support operations.
- MC-130E/H Combat Talon I/II – Special operations infiltration/extraction variant
- MC-130W Combat Spear/Dragon Spear – Special operations tanker/gunship
- MC-130P Combat Shadow – Special operations tanker
- MC-130J Commando II (formerly Combat Shadow II) – Special operations tanker Air Force Special Operations Command
- YMC-130H – Modified aircraft under Operation Credible Sport for second Iran hostage crisis rescue attempt
- Permanent conversion for flight test operations
- Maritime patrol
- Surveillance aircraft for reconnaissance
- SC-130J Sea Herc
- Proposed maritime patrol version of the C-130J, designed for coastal surveillance and anti-submarine warfare.
Significant military variants of the C-130 include:
The U.S. Forest Service developed the Modular Airborne FireFighting System for the C-130 in the 1970s, which allows regular aircraft to be temporarily converted to an airtanker for fighting wildfires. In the late 1980s, 22 retired USAF C-130As were removed from storage at Davis-Monthan Air Force Base and transferred to the U.S. Forest Service who then sold them to six private companies to be converted into air tankers (see U.S. Forest Service airtanker scandal). After one of these aircraft crashed due to wing separation in flight as a result of fatigue stress cracking, the entire fleet of C-130A air tankers was permanently grounded in 2004 (see 2002 airtanker crashes). C-130s have been used to spread chemical dispersants onto the massive oil slick in the Gulf Coast in 2010. 
Since 2004, the Pakistan Air Force has employed C-130s in the War in North-West Pakistan. Some variants had forward looking infrared (FLIR Systems Star Safire III EO/IR) sensor balls, to enable close tracking of Islamist militants.
During the 2003 invasion of Iraq (Operation Iraqi Freedom), the C-130 Hercules was used operationally by Australia, the UK and the United States. After the initial invasion, C-130 operators as part of the Multinational force in Iraq used their C-130s to support their forces in Iraq.
During the invasion of Afghanistan in 2001 and the ongoing support of the International Security Assistance Force (Operation Enduring Freedom), the C-130 Hercules has been used operationally by Australia, Belgium, Canada, Denmark, France, Italy, the Netherlands, New Zealand, Norway, Portugal, South Korea, Spain, the UK and the United States.
The AC-130 also holds the record for the longest sustained flight by a C-130. From 22 to 24 October 1997, two AC-130U gunships flew 36 hours nonstop from Hurlburt Field Florida to Taegu (Daegu), South Korea while being refueled seven times by KC-135 tanker aircraft. This record flight shattered the previous record longest flight by over 10 hours while the two gunships took on 410,000 lb (190,000 kg) of fuel. The gunship has been used in every major U.S. combat operation since Vietnam, except for Operation El Dorado Canyon, the 1986 attack on Libya.
Since 1992, two successive C-130 aircraft named Fat Albert have served as the support aircraft for the U.S. Navy Blue Angels flight demonstration team. Fat Albert I was a TC-130G (15189), while Fat Albert II is a C-130T (164763). Although Fat Albert supports a Navy squadron, it is operated by the U.S. Marine Corps (USMC) and its crew consists solely of USMC personnel. At some air shows featuring the team, Fat Albert takes part, performing flyovers. Until 2009, it also demonstrated its rocket-assisted takeoff (RATO) capabilities; these ended due to dwindling supplies of rockets.
During the Gulf War of 1991 (Operation Desert Storm), the C-130 Hercules was used operationally by the U.S. Air Force, U.S. Navy and U.S. Marine Corps, along with the air forces of Australia, New Zealand, Saudi Arabia, South Korea and the UK. The MC-130 Combat Talon variant also made the first attacks using the largest conventional bombs in the world, the BLU-82 "Daisy Cutter" and GBU-43/B Massive Ordnance Air Blast bomb, also known as the MOAB. Daisy Cutters were used to clear landing zones and to eliminate mine fields. The weight and size of the weapons make it impossible or impractical to load them on conventional bombers. The GBU-43/B MOAB is a successor to the BLU-82 and can perform the same function, as well as perform strike functions against hardened targets in a low air threat environment.
During the Falklands War (Spanish: Guerra de las Malvinas) of 1982, Argentine Air Force C-130s undertook highly dangerous, daily re-supply night flights as blockade runners to the Argentine garrison on the Falkland Islands. They also performed daylight maritime survey flights. One was lost during the war. Argentina also operated two KC-130 tankers during the war, and these refueled both the Douglas A-4 Skyhawks and Navy Dassault-Breguet Super Étendards; some C-130s were modified to operate as bombers with bomb-racks under their wings. The British also used RAF C-130s to support their logistical operations.
The C-130 was also used in the 1976 Entebbe raid in which Israeli commando forces carried a surprise assault to rescue 103 passengers of an airliner hijacked by Palestinian and German terrorists at Entebbe Airport, Uganda. The rescue force — 200 soldiers, jeeps, and a black Mercedes-Benz (intended to resemble Ugandan Dictator Idi Amin's vehicle of state) — was flown over 2,200 nmi (4,074 km; 2,532 mi) almost entirely at an altitude of less than 100 ft (30 m) from Israel to Entebbe by four Israeli Air Force (IAF) Hercules aircraft without mid-air refueling (on the way back, the planes refueled in Nairobi, Kenya).
Another prominent role for the B model was with the United States Marine Corps, where Hercules initially designated as GV-1s replaced C-119s. After Air Force C-130Ds proved the type's usefulness in Antarctica, the U.S. Navy purchased a number of B-models equipped with skis that were designated as LC-130s. C-130B-II electronic reconnaissance aircraft were operated under the SUN VALLEY program name primarily from Yokota Air Base, Japan. All reverted to standard C-130B cargo aircraft after their replacement in the reconnaissance role by other aircraft.
The A-model continued in service through the Vietnam War, where the aircraft assigned to the four squadrons at Naha AB, Okinawa and one at Tachikawa Air Base, Japan performed yeoman's service, including operating highly classified special operations missions such as the BLIND BAT FAC/Flare mission and FACT SHEET leaflet mission over Laos and North Vietnam. The A-model was also provided to the South Vietnamese Air Force as part of the Vietnamization program at the end of the war, and equipped three squadrons based at Tan Son Nhut AFB. The last operator in the world is the Honduran Air Force, which is still flying one of five A model Hercules (FAH 558, c/n 3042) as of October 2009. As the Vietnam War wound down, the 463rd Troop Carrier/Tactical Airlift Wing B-models and A-models of the 374th Tactical Airlift Wing were transferred back to the United States where most were assigned to Air Force Reserve and Air National Guard units.
During the late 1960s, the U.S. was eager to get information on Chinese nuclear capabilities. After the failure of the Black Cat Squadron to plant operating sensor pods near the Lop Nur Nuclear Weapons Test Base using a Lockheed U-2, the CIA developed a plan, named Heavy Tea, to deploy two battery-powered sensor pallets near the base. To deploy the pallets, a Black Bat Squadron crew was trained in the U.S. to fly the C-130 Hercules. The crew of 12, led by Col Sun Pei Zhen, took off from Takhli Royal Thai Air Force Base in an unmarked U.S. Air Force C-130E on 17 May 1969. Flying for six and a half hours at low altitude in the dark, they arrived over the target and the sensor pallets were dropped by parachute near Anxi in Gansu province. After another six and a half hours of low altitude flight, they arrived back at Takhli. The sensors worked and uploaded data to a U.S. intelligence satellite for six months, before their batteries wore out. The Chinese conducted two nuclear tests, on 22 September 1969 and 29 September 1969, during the operating life of the sensor pallets. Another mission to the area was planned as Operation Golden Whip, but was called off in 1970. It is most likely that the aircraft used on this mission was either C-130E serial number 64-0506 or 64-0507 (cn 382-3990 and 382-3991). These two aircraft were delivered to Air America in 1964. After being returned to the U.S. Air Force sometime between 1966 and 1970, they were assigned the serial numbers of C-130s that had been destroyed in accidents. 64-0506 is now flying as 62-1843, a C-130E that crashed in Vietnam on 20 December 1965 and 64-0507 is now flying as 63-7785, a C-130E that had crashed in Vietnam on 17 June 1966.
In October 1968, a C-130Bs from the 463rd Tactical Airlift Wing dropped a pair of M-121 10,000 pound bombs that had been developed for the massive B-36 bomber but had never been used. The U.S. Army and U.S. Air Force resurrected the huge weapons as a means of clearing landing zones for helicopters and in early 1969 the 463rd commenced Commando Vault missions. Although the stated purpose of COMMANDO VAULT was to clear LZs, they were also used on enemy base camps and other targets.
In the Indo-Pakistani War of 1965, the Pakistan Air Force modified/improvised several aircraft for use as heavy bombers, and attacks were made on Indian bridges and troop concentrations with some successes. No aircraft were lost in the operations, though one was slightly damaged.
In November 1964, on the other side of the globe, C-130Es from the 464th Troop Carrier Wing but loaned to 322d Air Division in France, flew one of the most dramatic missions in history in the former Belgian Congo. After communist Simba rebels took white residents of the city of Stanleyville hostage, the U.S. and Belgium developed a joint rescue mission that used the C-130s to airlift and then drop and air-land a force of Belgian paratroopers to rescue the hostages. Two missions were flown, one over Stanleyville and another over Paulis during Thanksgiving weeks. The headline-making mission resulted in the first award of the prestigious MacKay Trophy to C-130 crews.
In 1964, C-130 crews from the 6315th Operations Group at Naha Air Base, Okinawa commenced forward air control (FAC; "Flare") missions over the Ho Chi Minh Trail in Laos supporting USAF strike aircraft. In April 1965 the mission was expanded to North Vietnam where C-130 crews led formations of B-57 bombers on night reconnaissance/strike missions against communist supply routes leading to South Vietnam. In early 1966 Project Blind Bat/Lamplighter was established at Ubon RTAFB, Thailand. After the move to Ubon the mission became a four-engine FAC mission with the C-130 crew searching for targets then calling in strike aircraft. Another little-known C-130 mission flown by Naha-based crews was Operation Commando Scarf, which involved the delivery of chemicals onto sections of the Ho Chi Minh Trail in Laos that were designed to produce mud and landslides in hopes of making the truck routes impassable.
In 1963, a Hercules achieved and still holds the record for the largest and heaviest aircraft to land on an aircraft carrier. During October and November that year, a USMC KC-130F (BuNo 149798), loaned to the U.S. Naval Air Test Center, made 29 touch-and-go landings, 21 unarrested full-stop landings and 21 unassisted take-offs on Forrestal at a number of different weights. The pilot, LT (later RADM) James H. Flatley III, USN, was awarded the Distinguished Flying Cross for his role in this test series. The tests were highly successful, but the idea was considered too risky for routine "Carrier Onboard Delivery" (COD) operations. Instead, the Grumman C-2 Greyhound was developed as a dedicated COD aircraft. The Hercules used in the test, most recently in service with Marine Aerial Refueler Squadron 352 (VMGR-352) until 2005, is now part of the collection of the National Museum of Naval Aviation at NAS Pensacola, Florida.
Australia became the first non-American force to operate the C-130A Hercules with 12 examples being delivered from late 1958. These aircraft were fitted with AeroProducts three-blade, 15-foot diameter propellers. The Royal Canadian Air Force became another early user with the delivery of four B-models (Canadian designation C-130 Mk I) in October / November 1960.
The first production aircraft, C-130As were first delivered beginning in 1956 to the 463d Troop Carrier Wing at Ardmore AFB, Oklahoma and the 314th Troop Carrier Wing at Sewart AFB, Tennessee. Six additional squadrons were assigned to the 322d Air Division in Europe and the 315th Air Division in the Far East. Additional aircraft were modified for electronics intelligence work and assigned to Rhein-Main Air Base, Germany while modified RC-130As were assigned to the Military Air Transport Service (MATS) photo-mapping division.
As of January 2014, Air Mobility Command, Air Force Materiel Command and the Air Force Research Lab are in the early stages of defining requirements for the C-X next generation airlifter program to replace both the C-130 and C-17. An aircraft would be produced from the early 2030s to the 2040s. If requirements are decided for operating in contested airspace, Air Force procurement of C-130s would end by the end of the decade to not have them serviceable by the 2030s and operated when they can't perform in that environment. Development of the airlifter depends heavily on the Army's "tactical and operational maneuver" plans. Two different cargo planes could still be created to separately perform tactical and strategic missions, but which course to pursue is to be decided before C-17s need to be retired.
In October 2010, the Air Force released a capabilities request for information (CRFI) for the development of a new airlifter to replace the C-130. The new aircraft is to carry a 190 percent 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 drop them off at locations without long runways. Various options are being considered, including new or upgraded fixed-wing designs, rotorcraft, tiltrotors, or even an airship. Development could start in 2014, and become operational by 2024. The C-130 fleet of around 450 planes would be replaced by only 250 aircraft. 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. The Air Force Research Laboratory funded Lockheed and Boeing demonstrators for the Speed Agile concept, which had the goal of making a STOL aircraft that can take off and land at speeds as low as 70 kn (130 km/h; 81 mph) on airfields less than 2,000 ft 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. Boeing's design completed over 2,000 hours of windtunnel tests in late 2009. It was a 5 percent-scale model of a narrowbody design with a 55,000 lb (25,000 kg) payload. When the AFRL increased the payload requirement to 65,000 lb (29,000 kg), they tested a 5% scale model of a widebody design with a 303,000 lb (137,000 kg) take-off gross weight and an "A400M-size" 158 in (13.2 ft) wide cargo box. It would be powered by four IAE V2533 turbofans. 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 combines a low drag airframe with simple mechanical assembly to reduce weight and better aerodynamics. The model had four engines, including two Williams FJ44 turbofans. On 26 March 2013, Boeing was granted a patent for its swept-wing powered lift aircraft.
An engine enhancement program saving fuel and providing lower temperatures in the T56 engine has been approved, and the US Air Force expects to save $2 billion and extend the fleet life.
In 2000, Boeing was awarded a US$1.4 billion contract to develop an Avionics Modernization Program kit for the C-130. The program was beset with delays and cost overruns until project restructuring in 2007. On 2 September 2009, Bloomberg news reported that the planned Avionics Modernization Program (AMP) upgrade to the older C-130s would be dropped to provide more funds for the F-35, CV-22 and airborne tanker replacement programs. However, in June 2010, Department of Defense approved funding for the initial production of the AMP upgrade kits. Under the terms of this agreement, the USAF has cleared Boeing to begin low-rate initial production (LRIP) for the C-130 AMP. A total of 198 aircraft are expected to feature the AMP upgrade. The current cost per aircraft is US$14 million although Boeing expects that this price will drop to US$7 million for the 69th aircraft.
Upgrades and changes
In the 1990s, the improved C-130J Super Hercules was developed by Lockheed (later Lockheed Martin). This model is the newest version and the only model in production. Externally similar to the classic Hercules in general appearance, the J model has new turboprop engines, six-bladed propellers, digital avionics, and other new systems.
 The crash was attributed to disengagement of the rudder fly-by-wire flight control system, resulting in a total loss of rudder control capability while conducting ground minimum control speed tests (Vmcg). The disengagement was a result of the inadequate design of the rudder's integrated actuator package by its manufacturer; the operator's insufficient system safety review failed to consider the consequences of the inadequate design to all operating regimes. A factor which contributed to the accident was the flight crew's lack of engineering flight test training. The HTTB first flew on 19 June 1984, with civil registration of N130X. After demonstrating many new technologies, some of which were applied to the C-130J, the HTTB was lost in a fatal accident on 3 February 1993, at  Modifications made to the HTTB included extended chord ailerons, a long chord rudder, fast-acting double-slotted trailing edge flaps, a high-camber wing leading edge extension, a larger dorsal fin and dorsal fins, the addition of three spoiler panels to each wing upper surface, a long-stroke main and nose landing gear system, and changes to the flight controls and a change from direct mechanical linkages assisted by hydraulic boost, to fully powered controls, in which the mechanical linkages from the flight station controls operated only the hydraulic control valves of the appropriate boost unit. Building on lessons learned, Lockheed Martin modified a commercial variant of the C-130 into a High Technology Test Bed (HTTB). This test aircraft set numerous short takeoff and landing performance records and significantly expanded the database for future derivatives of the C-130.
In the 1970s, Lockheed proposed a C-130 variant with turbofan engines rather than turboprops, but the U.S. Air Force preferred the takeoff performance of the existing aircraft. In the 1980s, the C-130 was intended to be replaced by the Advanced Medium STOL Transport project. The project was canceled and the C-130 has remained in production.
The Lockheed L-100 (L-382) is a civilian variant, equivalent to a C-130E model without military equipment. The L-100 also has two stretched versions.
The C-130R and C-130T are U.S. Navy and USMC models, both equipped with underwing external fuel tanks. The USN C-130T is similar, but has additional avionics improvements. In both models, aircraft are equipped with Allison T56-A-16 engines. The USMC versions are designated KC-130R or KC-130T when equipped with underwing refueling pods and pylons and are fully night vision system compatible.
The HC-130 is a family of long-range search and rescue variants used by the USAF and the U.S. Coast Guard. Equipped for deep deployment of Pararescuemen (PJs), survival equipment, and (in the case of USAF versions) aerial refueling of combat rescue helicopters, HC-130s are usually the on-scene command aircraft for combat SAR missions (USAF only) and non-combat SAR (USAF and USCG). Early USAF versions were also equipped with the Fulton surface-to-air recovery system, designed to pull a person off the ground using a wire strung from a helium balloon. The John Wayne movie The Green Berets features its use. The Fulton system was later removed when aerial refueling of helicopters proved safer and more versatile. The movie The Perfect Storm depicts a real life SAR mission involving aerial refueling of a New York Air National Guard HH-60G by a New York Air National Guard HC-130P.
The MC-130E Combat Talon was developed for the USAF during the Vietnam War to support special operations missions throughout Southeast Asia, and spawned both an MC-130H Combat Talon II as well as a family of other special missions aircraft. 37 of the earliest models currently operating with the Air Force Special Operations Command (AFSOC) are scheduled to be replaced by new-production MC-130J versions. The EC-130 Commando Solo is another special missions variant within AFSOC, albeit operated solely by an AFSOC-gained wing in the Pennsylvania Air National Guard, and is a psychological operations/information operations (PSYOP/IO) platform equipped as an aerial radio station and television stations able to transmit messaging over commercial frequencies. Other versions of the EC-130, most notably the EC-130H Compass Call, are also special variants, but are assigned to the Air Combat Command (ACC). The AC-130 gunship was first developed during the Vietnam War to provide close air support and other ground-attack duties.
The equivalent model for export to the UK is the C-130K, known by the Royal Air Force (RAF) as the Hercules C.1. The C-130H-30 (Hercules C.3 in RAF service) is a stretched version of the original Hercules, achieved by inserting a 100 in (2.54 m) plug aft of the cockpit and an 80 in (2.03 m) plug at the rear of the fuselage. A single C-130K was purchased by the Met Office for use by its Meteorological Research Flight, where it was classified as the Hercules W.2. This aircraft was heavily modified (with its most prominent feature being the long red and white striped atmospheric probe on the nose and the move of the weather radar into a pod above the forward fuselage). This aircraft, named Snoopy, was withdrawn in 2001 and was then modified by Marshall of Cambridge Aerospace as flight-testbed for the A400M turbine engine, the TP400. The C-130K is used by the RAF Falcons for parachute drops. Three C-130K (Hercules C Mk.1P) were upgraded and sold to the Austrian Air Force in 2002.
C-130H models produced from 1992 to 1996 were designated as C-130H3 by the USAF. The "3" denoting the third variation in design for the H series. Improvements included ring laser gyros for the INUs, GPS receivers, a partial glass cockpit (ADI and HSI instruments), a more capable APN-241 color radar, night vision device compatible instrument lighting, and an integrated radar and missile warning system. The electrical system upgrade included Generator Control Units (GCU) and Bus Switching units (BSU)to provide stable power to the more sensitive upgraded components.
The United States Coast Guard employs the HC-130H for long-range search and rescue, drug interdiction, illegal migrant patrols, homeland security, and logistics.
The C-130H model has updated Allison T56-A-15 turboprops, a redesigned outer wing, updated avionics and other minor improvements. Later H models had a new, fatigue-life-improved, center wing that was retrofitted to many earlier H-models. The H model remains in widespread use with the United States Air Force (USAF) and many foreign air forces. Initial deliveries began in 1964 (to the RNZAF), remaining in production until 1996. An improved C-130H was introduced in 1974, with Australia purchasing 12 of type in 1978 to replace the original 12 C-130A models, which had first entered RAAF Service in 1958.
The KC-130 tankers, originally C-130Fs procured for the US Marine Corps (USMC) in 1958 (under the designation GV-1) are equipped with a removable 3,600 US gal (13,626 l) stainless steel fuel tank carried inside the cargo compartment. The two wing-mounted hose and drogue aerial refueling pods each transfer up to 300 US gal per minute (19 l per second) to two aircraft simultaneously, allowing for rapid cycle times of multiple-receiver aircraft formations, (a typical tanker formation of four aircraft in less than 30 minutes). The US Navy's C-130G has increased structural strength allowing higher gross weight operation.
The extended-range C-130E model entered service in 1962 after it was developed as an interim long-range transport for the Military Air Transport Service. Essentially a B-model, the new designation was the result of the installation of 1,360 US gal (5,150 L) Sargent Fletcher external fuel tanks under each wing's midsection and more powerful Allison T56-A-7A turboprops. The hydraulic boost pressure to the ailerons was reduced back to 2050 psi as a consequence of the external tanks' weight in the middle of the wingspan. The E model also featured structural improvements, avionics upgrades and a higher gross weight. Australia took delivery of 12 C130E Hercules during 1966–67 to supplement the 12 C-130A models already in service with the RAAF. Sweden and Spain fly the TP-84T version of the C-130E fitted for aerial refueling capability.
The C-130B model was developed to complement the A models that had previously been delivered, and incorporated new features, particularly increased fuel capacity in the form of auxiliary tanks built into the center wing section and an AC electrical system. Four-bladed Hamilton Standard propellers replaced the Aeroproducts three-bladed propellers that distinguished the earlier A-models. An electronic reconnaissance variant of the C-130B was designated C-130B-II. A total of 13 aircraft were converted. The C-130B-II was distinguished by its false external wing fuel tanks, which were disguised signals intelligence (SIGINT) receiver antennas. These pods were slightly larger than the standard wing tanks found on other C-130Bs. Most aircraft featured a swept blade antenna on the upper fuselage, as well as extra wire antennas between the vertical fin and upper fuselage not found on other C-130s. Radio call numbers on the tail of these aircraft were regularly changed so as to confuse observers and disguise their true mission.
As the C-130A became operational with Tactical Air Command (TAC), the C-130's lack of range became apparent and additional fuel capacity was added in the form of external pylon-mounted tanks at the end of the wings.
The initial production model, the C-130A, was powered by Allison T56-A-9 turboprops with three-blade propellers and originally equipped with the blunt nose of the prototypes. Deliveries began in December 1956, continuing until the introduction of the C-130B model in 1959. Some A models were re-designated C-130D after being equipped with skis. The newer C-130B had ailerons with increased boost—3,000 psi (21 MPa) versus 2,050 psi (14 MPa)—as well as uprated engines and four-bladed propellers that were standard until the J-model's introduction.