09/30/2008. Remarks by Johan Visschedijk: "Dr. Gustav Victor Lachmann designed the H.P.47 experimental general-purpose aircraft to meet the Air Ministry Specification G.4/31 issued in July 1931. A large number of tasks were stipulated by the specification: day and night light bombing, dive-bombing, torpedo bombing, land and coastal reconnaissance, army cooperation and photography, and casualty evacuation.

The sole prototype was ordered in 1932 and powered by a 570 hp Bristol Pegasus II M.3 air-cooled radial engine, it was flown for the first time by Squadron Leader T. H. England at Radlett on November 27, 1933. After numerous trials and installation of military equipment and a new 660 hp Pegasus III M.3 engine the aircraft was delivered to the A&AEE at Martlesham Heath on April 20, 1935.

It was transferred to the RAE at Farnborough in March 1936, ending its career as an engine development aircraft, being struck off charge and scrapped in May 1937."