Sir Ross Macpherson Smith (4 December 1892 – 13 April 1922) was an Australian aviator. He and his brother, Sir Keith Macpherson Smith, were the first pilots to fly from England to Australia, in 1919.

Smith was pilot for T. E. Lawrence (Lawrence of Arabia) and fought in aerial combat missions in the Middle East. He is mentioned several times in Lawrence's book, "Seven Pillars of Wisdom", Chapter 114.

Smith and his brother Keith, Sergeant James Mallett (Jim) Bennett and Sergeant Wally Shiers, flew from Hounslow Heath Aerodrome, England on 12 November 1919 in a Vickers Vimy, eventually landing in Darwin Australia on 10 December, taking less than 28 days, with actual flying time of 135 hours. The four men shared the £10,000 prize money put forward by the Australian government.

Smith was killed (along with the recently commissioned Lieutenant Bennett) while testing a Vickers Viking amphibian aircraft which crashed in Byfleet soon after taking off from Brooklands on 13 April 1922. Captain Stanley Cockerell, test pilot for Vickers, had flown Smith and Bennett as passengers on the aircraft's maiden flight earlier that day and testified to the inquest that the machine seemed to be in perfect working order. The jury returned a verdict of death by misadventure. The bodies were transported to Australia and Smith was given a state funeral and later buried on 15 June at the North Road Cemetery, Adelaide.

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