This engine was a Commonwealth Aircraft Corporation (CAC) build, and had been upgraded to 92 specification at some time. This engine as acquired, was completely seized and great difficulty was encountered in dismantling it. The pistons in Nos 1, 13, 3, 2 and 5 had "grown" into the cylinder bores requiring some unorthodox methods to remove them. The cylinder barrels have been brought up to a reasonable standard, those beyond repair were replaced from stock. After getting various parts from the US, this engine was eventually brought up to running order.The Pratt & Whitney R 1830 is a double row 14 cylinder air cooled radial engine with a capacity of 1830 cubic inches, (30 litres), developing some 1200 horsepower at a maximum 2700 rpm.Engine Number 54828

This Manual was used by maintenance crews to repair American B-24 aircraft, for Army, Navy and British models.Vital for maintenance crews.Quarto size Paper Manual with cardboard backing held together with metal butterfly studs.Inscriptions as previously stated. RESTRICTED, FOR OFFICIAL USE ONLY, T.O. NO. 01-5EC-2. 2O JULY 1943 , REVISED 5 AUGUST 1944.