No. 5 Operational Training Unit RAAF
No. 5 Operational Training Unit was an operational training unit (OTU) of the Royal Australian Air Force. It was formed at Wagga Wagga, New South Wales, in October 1942 to train pilots and navigators for service in World War II. The unit was initially equipped with Bristol Beauforts and Beaufighters, and later received Douglas Bostons and de Havilland Mosquitos, among other types. No. 5 OTU was transferred to Tocumwal in October 1943, and then to Williamtown in mid-1944. It was reorganised as a fighter conversion unit flying and CAC Wirraways in February 1946, and disbanded in July 1947. No. 5 OTU was re-raised at Williamtown in April 1970 as a jet fighter conversion unit, equipped with CAC Sabres, de Havilland Vampires, and Macchi MB-326s. It ceased operations in July the following year, when the Sabre was retired from service. History World War II During World War II, the Royal Australian Air Force (RAAF) established several o ...
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5 OTU RAAF (P03594-015)
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. It has attained significance throughout history in part because typical humans have five digits on each hand. In mathematics 5 is the third smallest prime number, and the second super-prime. It is the first safe prime, the first good prime, the first balanced prime, and the first of three known Wilson primes. Five is the second Fermat prime and the third Mersenne prime exponent, as well as the third Catalan number, and the third Sophie Germain prime. Notably, 5 is equal to the sum of the ''only'' consecutive primes, 2 + 3, and is the only number that is part of more than one pair of twin primes, ( 3, 5) and (5, 7). It is also a sexy prime with the fifth prime number and first prime repunit, 11. Five is the third factorial prime, an alternating factorial, and an Eisenstein prime with no imaginary part and real part of the form 3p ...
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