Air Pictorial 1957-03
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B.Robertson - U.S. Aircraft in the British Services 1914-1955 (7)
The Fortress IIA (FK185) which was used as a test-bed for the Bristol B.16 nose turret, mounting a 40-mm. Vickers "S" gun.
The Republic Thunderbolt I in R.A.F. service. The Thunderbolt was operational with many squadrons in the S.E. Asia area.
Built by Boeing in Canada, the Catalina VI was distinguished by the tall fin and rudder. This variant did not become operational.