Over several years beginning in 1939, a total of 447 Finches were built, nearly all (431) of them for use as elementary trainers in the British Commonwealth Air Training Plan (BCATP) during the Second World War.[1] The aircraft had conventional construction for the period with a welded steel-tube fuselage having Warren truss structure for its sides; and composite metal, wood and fabric design features, with Frise ailerons, a flat-bottom airfoiled, variable incidence (trimmable) lifting two-piece tailplane; and similarly "lifting airfoil" on the fixed vertical stabilizer, cambered into an airfoil on its port side only, to offset the P-factor of the propeller's swirling slipstream.During 1940, initial production problems were solved and timely deliveries were made to the RCAF, allowing the first training programs to start up.In the following year, the Portuguese Navy purchased ten Model 16Ds (ordered as 10Bs but changed to the higher powered variant) and later a further five 16Ds were delivered in 1942.The Finch was progressively phased out of service from October 1944 with the last of the Model 16s struck off strength from the RCAF inventory in 1947.