de Havilland Don
The Don was designed to meet Air Ministry Specification T.6/36 for a multi-role trainer and was a single-engined monoplane of wooden stressed-skin construction.[1] The prototype with test marks E-3 (later military serial number L2387) first flew on 18 June 1937 and was transferred to RAF Martlesham Heath for official evaluation.The aircraft was also modified with small auxiliary fins fitted beneath the tailplane.24 Sqn and numerous RAF Station Flights throughout the UK until early 1939, but all were grounded for use as instructional airframes in March 1939.[4] Data from de Havilland Aircraft since 1909[5]General characteristics Performance