Stone memorial with RAAF roundel and silver plane. Unveiled on the 50th Jubilee, 29 September 1991. RAAF Badge. Historical Site of RAAF Base Lowood, 1941-1947. Plaque lists details of arrival and departure of all squadrons. Additional Information Joint memorial for Lowood Motor Racing Circuit 1948-1966. Length 2.825 miles (4.54km), anticlockwise. Bitumen surface. 26th Grand Prix held June 10 1960 - 36 laps, 101.7 miles (163.64km).