Towards the end of the Korean War, the USAF came to the realization that their transport fleet was becoming obsolete. The C-46 Commandos and C-47 Skytrains in service were no longer adequate, while the C-119 Flying Boxcar was having difficulties. In 1951, the USAF issued a requirement for a new tactical transport, an aircraft that would need to carry at least 72 passengers, be capable of dropping paratroopers, and have a ramp for loading vehicles directly into the cargo compartment. Moreover, it must be a “clean sheet” design, not a conversion from an existing airliner, and the USAF preferred it be a turboprop design. Five companies submitted designs, and six months later the USAF chose Lockheed’s L-402 design—over the misgivings of Lockheed’s chief designer, Clarence “Kelly” Johnson, who warned that the L-402 would destroy the company. Little was Johnson to know that, fifty years later, the L-402—designated C-130 Hercules by the USAF—would still be in production, and one out of only five aircraft to have over 50 years of service with the original purchaser.
The C-130 was designed to give mostly unfettered access to a large cargo compartment—the ramp forms an integral part of the rear fuselage, the wing is mounted above the fuselage, and the landing gear is carried in sponsons attached to the fuselage itself, while the fuselage has a circular design to maximize loading potential. The high wing also gives the C-130 good lift, especially in “high and hot” situations. The Allison T56 turboprop was designed specifically for the Hercules, and has gone on to become one of the most successful turboprop designs in history.
After two YC-130 prototypes, the Hercules went into production as the C-130A in 1956, to be superseded by the improved C-130B in 1959. The latter became the baseline Hercules variant: C-130As had three-blade propellers and a rounded “Roman” nose, while the B introduced the more familiar, longer radar nose and four-blade propellers. (Virtually all A models were later retrofitted to the long nose, though they kept the three-blade propellers.) In the 50 years hence, the basic C-130 design has not changed much: the C-130E introduced underwing external fuel tanks, while the C-130H has a slightly different wing. Even the new C-130J variant only introduced new engines with more fuel efficient six-bladed propellers: the basic design remains the same. Lockheed also offers stretched versions of the Hercules, initially as a civilian-only option (the L-100-30); the British Royal Air Force bought this version as the C-130K and it was later adopted by other nations, including the United States.
The basic C-130 is strictly a transport aircraft, but the versatility of the aircraft has meant it has been modified into a dizzying number of variants. These include the AC-130 Spectre gunship, the HC-130 rescue aircraft and WC-130 weather reconnaissance version. Other versions include several dozen EC-130 electronic warfare/Elint variants, KC-130 tankers, and DC-130 drone aircraft controllers. The USAF, the US Navy, and the US Marine Corps are all C-130 operators as well. Besides the United States, there are 67 other operators of C-130s, making it one of the world’s most prolific aircraft, with its only rivals the Bell UH-1 Iroquois family and the Antonov An-2 Colt biplane transport. C-130s are also used extensively by civilian operators as well as the L-100 series.
The “Herky Bird,” as it is often nicknamed, has participated in every military campaign fought by the United States since 1960 in one variation or the other. During Vietnam, it was used in almost every role imaginable, from standard transport to emergency bomber: as the latter, it dropped M121 10,000 pound mass-focus bombs to clear jungle away for helicopter landing zones, and it was even attempted to use C-130s with these bombs against the infamous Thanh Hoa Bridge in North Vietnam. (Later this capability was added as standard to MC-130 Combat Talon special forces support aircraft; the MC-130 is the only aircraft cleared to carry the GBU-43 MOAB.) It was also instrumental in resupplying the Khe Sanh garrison during its three-month siege. Hercules crews paid the price as well: nearly 70 C-130s were lost during the Vietnam War. In foreign service, C-130s have also been used heavily, the most famous instance of which was likely the Israeli Entebbe Raid of 1976, one of the longest-ranged C-130 missions in history. C-130s are often in the forefront of humanitarian missions to trouble spots around the world.
As of this writing, over 2300 C-130s have been built, and most are still in service. It remains the backbone of the USAF’s tactical transport service; attempts to replace it with the Advanced Tactical Transport Program (ATTP) in the 1980s and to supplement it with the C-27J Spartan in the 2000s both failed, as the USAF realized that the only real replacement for a C-130 is another C-130.
This former Royal Norwegian Air Force C-130H is in the Pima Air and Space Museum's restoration yard. Serial Number 355 was built for the RNAF, and served its entire career with 335 Squadron at Oslo-Gardemoen, from around 1978 to 2008. It was retired in favor of a C-130J, and flown to storage at AMARC in Arizona. In 2020, it was chosen by Coulson Aerospace for conversion to a C-130 firebomber, and towed from AMARC to Pima.
Though Pima does lack a C-130H (they have a C-130A and LC-130D), this looks to be a temporary home for 355. It still retains its RNAF colors and Spraylat preservative; the device on the rudder is a gust lock. If this aircraft will be flying again before long, I'm glad I got a shot of 355 in June 2022.
