Imperial staircase to imperial staircases are more often of just two flights (hence the name) leaving the ground symmetrically to join one common destination. Occasionally, especially in the architecture of the Sicilian Baroque, they will leave the ground as one flight and then divide, but this is less common. One may also see an imperial staircase in the form of two flights rising to join and then continue as one flight, but this is rare. Imperial staircase An imperial staircase (sometimes erroneously known as a "double staircase") is the name given to a staircase with divided flights. Usually the first flight rises
Imperial Gift Army). The Imperial Gift enabled the formation of the Royal Australian Air Force on 31 March 1921. An Air Board, answering to the Minister for Defence, would administer the new service. Imperial Gift aircraft were shipped to Australia in 1919, assembled upon delivery in 1920 and served for up to 10 years. The Airco/de Haviland DH-9a (A1-17/F2779) was the longest serving Imperial Gift aircraft, being written off on 4 February 1930. The only original surviving Imperial Gift aircraft in Australia are an Avro 504K (A3-4/H2174), stored at the Treloar Technology Centre (Canberra) and an S.E.5a (A2-4/C1916), in the collection of