The Martinsyde F.3 was re-engineered and fitted with the 300 hp Hispano-Suiza engine and in thiis form it became the F.4 Buzzard. The Buzzard was tested in June 1918, maximum airspeed was 145mph. It was to be put in service as a replacement for the S.E.5a. It was to be put into large production, however, I only know of one order, for 150 Buzzard. Mk.I machines, serial numbers D''4211 to D''4360. An order for 1500 Martinsyde F.4 Buzzards were ordered from the U.S.A. with the Wright Martin Model H 300 hp engine. It was also supposed to serve with with the Independent Force as escort fighters. The Buzzard was superior in all aspects to the Sopwith 7F.1 Snipe. But after the War the RAF selected the Snipe to be the RAF fighter in the post war years until the arrival in Gloster Grebe in 1922."


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