The USAF Air Demonstration Squadron ("Thunderbirds") is the air demonstration squadron of the United States Air Force (USAF). The Thunderbirds are assigned to the 57th Wing, and are based at Nellis Air Force Base, Nevada. Created in 1953, the USAF Thunderbirds are the third oldest formal flying aerobatic team (under the same name) in the world, after the United States Navy Blue Angels formed in 1946 and the prestigious French Air Force Patrouille de France formed in 1931. The Thunderbirds Squadron tours the United States and much of the world, performing aerobatic formation and solo flying in specially marked aircraft. The squadron's name is taken from the legendary creature that appears in the mythologies of several indigenous North American cultures. On 1 March 2013, the USAF announced that due to budget cuts, aerial demonstration team performances would cease indefinitely, effective 1 April 2013. On 6 December 2013 the Thunderbirds announced their 2014 schedule and the resumption of their appearances.  The Thunderbirds perform aerial demonstrations in the F-16C Fighting Falcon, and they also fly two F-16D twin-seat trainers. The F-16 has been the demonstration aircraft for the Thunderbirds since the 1983 season. In January 1982, several members of the squadron were killed in what became known as the "Diamond Crash" of T-38 Talon aircraft which the squadron had flown since 1974. Partially as a result of that accident, the squadron switched to the F-16A, and sat out the 1982 airshow season and spent that year retraining and transitioning over to the new aircraft to ready themselves for the 1983 season. The F-16, however, had been considered for transition prior to the accident. In rebuilding the Thunderbird Team, the Air Force recruited previous Thunderbird pilots, qualified each in the F-16A, and had them begin by flying "two-ship" maneuvers, then expanded the program one airplane at a time up to the full six airplanes. Beginning in June 1982, the F-16 Thunderbirds were led by Major Jim Latham. The team continues to fly the F-16, having switched from the F-16A to the F-16C in 1992.Only a few minor modifications differentiate a Thunderbird from an operational F-16C. These include the replacement of the 20 mmcannon and ammunition drum with a smoke-generating system, including its plumbing and control switches, the removal of the jet fuel starter exhaust door, and the application of the Thunderbirds' glossy red, white, and blue polyurethane paint scheme. All of the modification work is performed at the maintenance depot at Hill AFB near Ogden, Utah. Other than those modifications, the aircraft are taken from the standard USAF inventory as production fighters, and can be returned to an operational squadron in short order without any major modification.

The Thunderbirds Squadron is a named USAF squadron, meaning it does not carry a numerical designation. It is also one of the oldest squadrons in the Air Force, its origins dating to the organization of the 30th Aero Squadron, formed at Kelly Field, Texas, on 13 June 1917.[2] Officers serve a two-year assignment with the squadron, while enlisted personnel serve three to four years. As the squadron performs no more than 88 air demonstrations each year, replacements must be trained for about half of the team each year, in order to provide a constant mix of experience. In addition to their air demonstration responsibilities, the Thunderbirds are part of the USAF combat force and if required, can be rapidly integrated into an operational fighter unit. Since 15 February 1974 the Thunderbirds have been a component of the 57th Wing at Nellis AFB. Since 1953, they have flown in front of more than 300 million people.

F-16 Fighting Falcon The Thunderbirds performing the crossover break The Thunderbirds perform aerial demonstrations in the F-16C Fighting Falcon, and they also fly two F-16D twin-seat trainers. The F-16 has been the demonstration aircraft for the Thunderbirds since the 1983 season. In January 1982, four members of the squadron were killed in what became known as the "Diamond Crash" of T-38 Talon aircraft which the squadron had flown since 1974. Partially as a result of that accident, the squadron switched to the F-16A, and sat out the 1982 airshow season and spent that year retraining and transitioning over to the new aircraft to ready themselves for the 1983 season. The F-16, however, had been considered for transition prior to the accident. In rebuilding the Thunderbird Team, the Air Force recruited previous Thunderbird pilots, qualified each in the F-16A, and had them begin by flying "two-ship" maneuvers, then expanded the program one airplane at a time up to the full six airplanes. Beginning in June 1982, the F-16 Thunderbirds were led by Major Jim Latham. The team continues to fly the F-16, having switched from the F-16A to the F-16C in 1992. Only a few minor modifications differentiate a Thunderbird from an operational F-16C. These include the replacement of the 20 mm cannon and ammunition drum with a smoke-generating system, including its plumbing and control switches, the removal of the jet fuel starter exhaust door, and the application of the Thunderbirds' glossy red, white, and blue polyurethane paint scheme. All the modification work is performed at the maintenance depot at Hill AFB near Ogden, Utah. Other than those modifications, the aircraft are taken from the standard USAF inventory as production fighters, and can be returned to an operational squadron in short order without any major modification.

Demonstration routine The Thunderbirds performing their signature bomb burst maneuver From the end of the runway the four-ship Thunderbird team get ready to begin their takeoff roll with the words "Thunderbirds, let's run em up!" being retransmitted from the team leader's mic through the PA system for the crowd to hear. Diamond: Historically, as Thunderbirds 1 through 4 lift off, the slot aircraft slips immediately into position behind 1 to create the signature Diamond formation. Thanks to the 2009 upgrade to the Block 52, the Diamond now has more than enough thrust to continue to climb straight up into their first maneuver, the Diamond Loop. Solos: Thunderbird 5 takes to the air next, performing a clean low altitude aileron roll, followed by 6 who performs a split S, climbing in a near vertical maneuver, rolling over and diving back toward show center and pulling up just above the runway to exit in the opposite direction. Two Thunderbirds perform a calypso pass Much of the Thunderbirds' display alternates between maneuvers performed by the diamond, and those performed by the solos. They have a total of eight different formations: The Diamond, Delta, Stinger, Arrowhead, Line-Abreast, Trail, Echelon and the Five Card. The Arrowhead involves maneuvers in tight formation with as little as 18 inches (46 cm) fuselage to canopy separation. They perform formation loops and rolls or transitions from one formation to another. All maneuvers are performed at speeds of 450 to 500 mph (720 to 800 km/h). TB4 slot pilot flies as close as 18 inches to the commander, TB1, during the arrowhead loop The opposing solos usually perform their maneuvers just under the speed of sound (500 to 700 mph (800 to 1,130 km/h)), and show off the capabilities of their individual aircraft by doing maneuvers such as fast passes, slow passes, fast rolls, slow rolls, and very tight turns. Some of their maneuvers include both solo aircraft at once, such as opposing passes (passing in close proximity to each other) and mirror formations (two aircraft being flown back-to-back in the calypso pass or belly-to-belly). In mirror formations, one Thunderbird must be inverted, and it is always number 5. In fact, the number 5 on this aircraft is painted upside-down, and thus appears right-side-up for much of the routine. There is also an extra amount of humor regarding the inverted performance of Thunderbird 5: the pilots all wear tailored flight suits with their name and jet number embroidered on the left breast. The suit for the pilot of the number 5 airplane has the number sewn upside-down. Nearing the end the Diamond pulls straight up into the vertical to perform the signature "Bomb Burst," where all four aircraft break off in separate directions while a solo goes straight up through the maneuver and performs aileron rolls until three miles above the ground. At the end of the routine, all six aircraft join in formation, forming the Delta. One of the Thunderbirds' standing engagements is the annual commencement ceremony at the United States Air Force Academy in Colorado Springs. The jets fly over Falcon Stadium at the precise moment the cadets throw their hats into the air at ceremony's end.

Thunderbirds photo credit: AFdotML

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