79334 SECRET REPUBLIC F-105 THUNDERCHIEF ARMAMENT CAPABILITY SPIN TEST

Made by Republic Aviation around 1960, this F-105 Thunderchief promotional film — originally classified “Secret” according to a card at the end — focuses on the aircraft’s armament capability and spin tests. The film begins with astonishing shots of the aircraft’s wide array of ordnance, and shows the supersonic aircraft’s large bomb bay, equipped with an ejection system. The bay can also carry an extra fuel tank or small training bombs.

The aircraft is shown performing supersonic maneuvers at the 4:00 mark, with precision bomb release, including 1000 lb bombs. Sidewinder capable racks are shown installed at the 4:50 mark. A sidewinder vs. HVAC rocket is seen at the 5:40 mark. The F-105’s 20mm Vulcan gun is seen at the 5:50 mark.

Spin maneuvers are seen at the 7:30 mark, the location of many of the tests appears to be Edwards Air Force Base.

The Republic F-105 Thunderchief was a supersonic fighter-bomber used by the United States Air Force. The Mach 2 capable F-105 conducted the majority of strike bombing missions during the early years of the Vietnam War; it was the only U.S. aircraft to have been removed from combat due to high loss rates. Originally designed as a single-seat, nuclear-attack aircraft, a two-seat Wild Weasel version was later developed for the specialized Suppression of Enemy Air Defenses (SEAD) role against surface-to-air missile sites. The F-105 was commonly known as the “Thud” by its crews.

As a follow-on to the Mach 1 capable North American F-100 Super Sabre, the F-105 was also armed with missiles and a cannon; however, its design was tailored to high-speed low-altitude penetration carrying a single nuclear weapon internally. First flown in 1955, the Thunderchief entered service in 1958. The F-105 could deliver a greater bomb load than some American heavy bombers of World War II such as the Boeing B-17 Flying Fortress and Consolidated B-24 Liberator. The F-105 was one of the primary attack aircraft of the Vietnam War; over 20,000 Thunderchief sorties were flown, with 382 aircraft lost including 62 operational (non-combat) losses (out of the 833 produced). Although less agile than smaller MiG fighters, USAF F-105s were credited with 27.5 kills.

The Thunderchief was the largest single-seat, single-engine combat aircraft in history, weighing approximately 50,000 pounds (23,000 kg). It could exceed the speed of sound at sea level and reach Mach 2 at high altitude; the F-105 could carry up to 14,000 lb (6,400 kg) of bombs and missiles. The Thunderchief was later replaced as a strike aircraft over North Vietnam by both the McDonnell Douglas F-4 Phantom II and the swing-wing General Dynamics F-111 Aardvark. However, the “Wild Weasel” variants of the F-105 remained in service until 1984 after being replaced by the specialized F-4G “Wild Weasel V”.

The initial reaction of the fighter pilot community to their new aircraft was lukewarm. Between its massive dimensions and troubled early service life, the F-105 had garnered a number of uncomplimentary nicknames. In addition to the aforementioned “Thud”, nicknames included the “Squat Bomber”, “Lead Sled”, and the “Hyper Hog” and/or “Ultra Hog”. The latter two names arose from the F-105’s predecessors, the Republic P-47 Thunderbolt and F-84 Thunderstreak, nicknamed “Hog” and “Super Hog”, respectively. According to F-105 pilots and crews, the “Thud” nickname was inspired by the character “Chief Thunderthud” from the Howdy Doody television series.

The aircraft’s offensive capabilities were sarcastically referred to as a “Triple Threat” — it could bomb you, strafe you, or fall on you. Positive aspects, such as the F-105’s responsive controls, strong performance at high speed and low altitude, and its outfit of electronics won over some pilots. For some, “Thud” was a term of endearment; retroactively the RF-84F Thunderflash became known as “Thud’s Mother”. F-105 pilot Colonel Jack Broughton said of the nickname: “The Thud has justified herself, and the name that was originally spoken with a sneer has become one of utmost respect through the air fraternity”.

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