Pioneering Australian aviation Larkin married Vera Grace Russell Doman in
St Saviour's Church, London, on 15 March 1919. He and his bride sailed home to Australia, arriving in July 1919. After his arrival, he initially barnstormed "educational flights" in a
Sopwith Dove and made fuel storage systems in his shop in
Glen Huntly. Along with some old comrades from No. 87 Squadron, plus his brother Reg, Larkin founded an Australian
Sopwith agency named Larkin Sopwith Aviation Co. of Australia Ltd. Larkin claimed the honor of the first night flight in Australia on 25 October 1919 when he piloted the Dove over Australia's version of the
Henley Regatta.
Larkin Aircraft Supply Company When Sopwith liquidated in 1921, Larkin's agency became the
Larkin Aircraft Supply Company. The company would grow to over 100 employees, and produce gliders and a number of powered light aircraft designs, including Australia's first all-metal airplane, the
Lasco Lascoter of 1929. The company even opened a flying school in 1931. However, LASCO was crippled by the
Great Depression.
Pioneering air mail In December 1921, Larkin won the government's airmail contract for the Sydney-Adelaide route. However, his lack of suitable aircraft and sufficient capital led him to partner with Frank L. Roberts in
Australian Aerial Services. Roberts brought the government contract for the Sydney-Brisbane route into a partnership with Larkin. The need to form this partnership delayed acceptance of the contract until October 1923. As part of this partnership, Larkin Aircraft Supply Co. flew airmail and passengers over several different routes in Australia between 2 June 1924 and 9 September 1926, connecting Adelaide, Sydney,
Broken Hill,
Mildura, and
Hay. However, service on Roberts' Sydney-Brisbane route failed. ==Downfall==