Instructional Course Notes for the Lancaster Aircraft, AVRO Type '683' MK.I, II, III & X. Published by A.V.Roe & Co. Ltd., Manchester, July 1946. Card covers, 15 x 23cm. Approximately 66 pages plus 20 pullout diagrams/charts at the back. Subjects covered include the fuselage, flying controls, engine and secondary controls, hydraulic system, gun turret hydraulic system, electrics, wireless equipment, bomb gear, compasses etc. The diagrams include the instrument panel, hydraulics, fuel system, turret hydraulics etc. Each copy was marked as 'Confidential', covered by the official secrets act and had an individual serial number, 9101 in this case. The cover is rather crumpled/creased and dog-eared at the edges. The pages are generally good whilst the diagrams have some folded/creased edges and minor tears. Good used condition overall. An early post WW2 version of this excellent reference material. Stock code P18476.