Gustav Victor Lachmann (3 February 1896 – 30 May 1966) was a German aeronautical engineer who spent most of his professional life working for the British aircraft company Handley Page.
He served as a lieutenant in the German Army cavalry during World War I before transferring to the flying corps in 1917 and training as a pilot.
He concluded that a series of small aerofoils contained within a normal wing section would possess improved low-speed characteristics.
By chance, he read an account of Frederick Handley Page's public demonstration of leading-edge slots given at Cricklewood on 21 October 1921.
He borrowed DM 1000 from his mother to pay for wind-tunnel tests, to be undertaken by Ludwig Prandtl at Göttingen University and the patent was retrospectively granted as DE 347884.
He left Ishikawajima in 1929 to take a job with Handley Page in the United Kingdom as engineer in charge of slot development.
[4] From there he was transferred to an internment camp on the Isle of Man,[5] followed by one established for the duration of the war at Lingfield Park Racecourse, in Surrey.