The Percival Proctor was a British radio trainer and communications aircraft of the Second World War. The Proctor was a single-engine, low-wing monoplane with seating for three or four, depending on the model.

The Proctor was initially employed as a three-seat communications aircraft (Proctor I). This was followed by the Proctor II and Proctor III three-seat radio trainers.

In 1941, the Air Ministry issued Specification T.9/41 for a four-seat radio trainer. The P.31 – originally known as the "Preceptor" but finally redesignated the Proctor IV – was developed for this requirement with an enlarged fuselage. One Proctor IV was fitted with a 250 hp (157 kW) Gipsy Queen engine. This was used as a personal transport by AVM Sir Ralph Sorley but production models retained the 210 hp (157 kW) motor of earlier marks.

Highly modified Percival Proctors were used in the film Battle of Britain as stand-ins for the Ju-87 Stuka.

Info: Wikipedia
http://en.wikipedia.org/wiki/Percival_Proctor

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