Specification sheet detailing quantities and types of steel sheets with explanatory notes.
| Identifier | ExFiles\Box 142\2\ scan0507 | |
| Date | 21th January 1944 | |
| 1200 Rm. {William Robotham - Chief Engineer} 6/h. 21.1.44 STEEL - QUANTITIES AND SPECIFICATION. 50 sheets 72 x 48. N.A.B.O. 20 S.W.G. (.036) 80 sheets 72 x 48. N.A.B.O. 21 S.W.G. (.032) 10 sheets 72 x 48. N.A.B.O. 22 S.W.G. (.028) Note: N.A.B.O. signifies "Normalized Auto Body Oiled". The usual additions calling for deep drawing qualities need not apply for hand worked construction. This metal has a superior surface finish for paint application and is sometimes called "silver finish" by paint suppliers. 10 sheets 72 x 48. O.H.S.P.O. 18 S.W.G. (.048) 40 sheets 72 x 48. O.H.S.P.O. 20 S.W.G. (.036) 40 sheets 72 x 48. O.H.S.P.O. 21 S.W.G. (.032) 50 sheets 72 x 48. O.H.S.P.O. 22 S.W.G. (.028) 5 sheets 72 x 48. O.H.S.P.O. 12 S.W.G. (.104) 5 sheets 72 x 48. O.H.S.P.O. 14 S.W.G. (.080) Note: O.H.S.P.O. represents "Openhearth, single pickled, oiled". This is a fairly ductile steel with good welding qualities but not considered satisfactory for coach paint finish. .. .. Rm {William Robotham - Chief Engineer} /h. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).