bombing role; unfortunately for Handley-Page and Bristol, the Air Ministry had already decided, on the basis of experience with the Avro Aldershot that single-engine aircraft were not suitable for night-bombing. In the end, therefore the only successful contender was the Horsley, chosen for the day-bomber role. The second Berkeley was accepted by the Air Ministry in December 1925 and the all-metal third one in the following June. All three went to the Royal Aircraft Establishment (RAE) for experimental flight. The second aircraft undertook comparative trials of a four-blade wooden airscrew against its original two-blade steel one. One of the three Berkeleys was still flying with the RAE at the end of 1930. Specifications References Citations Bibliography 1920s British bomber aircraft Berkeley Single-engined tractor aircraft Biplanes