RAAF Base Richmond (IATA: XRH, ICAO: YSRI) is one of Australia's oldest and largest air force bases. It is located within the City of Hawkesbury in the north-western fringe of Sydney, New South Wales, between the towns of Windsor and Richmond. The base is home to the Royal Australian Air Force's transport headquarters, Air Lift Group, and its major operational formations, Nos. 84 and 86 Wings. The main aircraft type operated at the base is the Lockheed C-130 Hercules.