The Vickers Valetta was a twin-engine military transport aircraft. The fundamental differences between the Valetta and its Viking predecessor consisted of the fitting of more powerful engines, the installation of a strengthened cabin floor and the presence of a sizable pair of reinforced double-doors on the side of the fuselage for loading and unloading cargoes. The use of more powerful engines was largely necessitated by the aircraft's roughly 2,000 lb increase in all-up weight over that of the Viking. The engines fitted to the Valetta were a pair of Bristol Hercules 230 radial engines, each capable of providing up to 2,000 hp.