12/22/2004. Remarks by Johan Visschedijk: "First known as the "Tailless Research Aircraft" this aircraft was designed by Dr. Gustav Victor Lachmann to investigate the problems associated with tailless aircraft. The airframe was build by Dart Aircraft of Dunstable, England, the aircraft was finished at Radlett, England. During taxi trials on September 12, 1942, the aircraft flew unintendedly at an height of 12 ft (3.66 m) and was subsequently damaged while landing.

Marked with the 'Class B' markings H-0222 the aircraft flew for the first time on June 25, 1943. In 1945 it was designated H.P.75 for the first time. A total of 31 flights were made till April 3, 1946 (total flight time 17 hr 43 min) when the aircraft was stored and subsequently scrapped in 1952."