The Westland PV-3 was a British two-seat torpedo bomber of the 1930s built by Westland Aircraft Works. The aircraft was a private venture development and based on the Westland Wapiti. It never entered production. The aircraft is best known as one of the first two to fly over Everest as part of the Houston-Mount Everest Flight Expedition.
Westland produced the PV-6, a private-venture development of its successful Wapiti. This updated aircraft embodied a number of improvements including a lengthened fuselage, brakes and wheel spats on the undercarriage and a new engine. By this time both the appearance and performance differed considerably from the standard Wapiti, so the company designated it the "PV6 Wallace." Compared with the earlier Wapiti, the Wallace was 20 inches (0.5 m) longer, incorporated an improved undercarriage and was powered by a 655 hp (488 kW) Bristol Pegasus IV engine. The first batches of MK I Wallace's were conversions of Wapitis, a total of 68 powered by 570 bhp (425 kW) Pegasus IIM3 engines.
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