 Mackinolty remained in England following the end of hostilities , serving as " officer in charge of Australian packing " at RAF Hendon , near London , from December 1919 to September 1920 . In this role he was responsible for <unk> and shipping to Point Cook the 128 aircraft and associated spares , weaponry , vehicles , hangars and other equipment that made up Britain 's post @-@ war Imperial Gift of Royal Air Force surplus to Australia , which eventually filled 19 @,@ 000 cases . Mackinolty also completed formal training in aeronautical engineering before returning to Melbourne in October 1920 . Discharged from the AIF in January 1921 , he worked in the automotive industry and took a correspondence course on internal combustion engines . 
