In 1933 the prototype H.S.120 seaplane racer (on pontoons) was converted into a racing landplane as the Bernard V.4 no.1 with a 1,125 hp (839 kW) Hispano-Suiza 18Sb engine and shorter span wings.
The V.4 had widely spaced main landing gear with streamlined wheel spats. It was moved to Istres in December 1933 to try and achieve a French Air Ministry prize for a French aircraft to beat the world speed record before January 1934. It was due to make an attempt to fly on 27 December 1933 but strong winds kept the aircraft grounded. Further attempts in February 1934 to fly were thwarted by engine problems and lack of government finance. The project was abandoned without the aircraft have flown.