This design is based on the Spitfire FY-F (Serial BS435) flown by Squadron Leader Hugo "Sinker" Throssell Armstrong DFC & Bar. Squadron Leader Armstrong (9 June 1916 – 5 February 1943) was an Australian flying ace of the Royal Australian Air Force (RAAF) during the Second World War. He was credited with at least ten aerial victories. From Perth, Australia, Armstrong joined the RAAF in May 1940. After completing his flight training, he was sent to the United Kingdom where he was posted to No. 257 Squadron and then No. 129 Squadron. During his service with the latter, he destroyed a number of German aircraft while flying sorties to the Low Countries and France. He was later transferred to No. 72 Squadron, where he continued to be successful. Awarded the Distinguished Flying Cross (DFC) in May 1942, he was given command of No. 611 Squadron the following September. He received a bar to his DFC in January 1943 but was killed the following month when he was shot down over the English Channel. He was only 26 years old at the time of his death.