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).
Preliminary list defining the prefix letters used in drawing numbers and their corresponding departments.
| Identifier | ExFiles\Box 143\3\ scan0141 | |
| Date | 20th March 1940 guessed | |
| PRELIMINARY LIST OF PREFIX LETTERS IN USE WITH DRAWING NUMBERS. SHEET NO. 3. Prefix Letters. Department. ooo RD Alteration to detail drawings and LOP's - (Electrical) ooo RE (Engine) ooo RF Rationalised Chassis. (Frame) ooo RG{Mr Rowledge} (Gearbox) RS{Sir Henry Royce's Secretary} Detail Drawings(Design Pool) ooo RS{Sir Henry Royce's Secretary} Alteration to Detail Drawings(Design Pool) Rm.{William Robotham - Chief Engineer} Sk. Experimental Testers Drawings(Chassis) RR.Sch. D.D.O.Schemes(Chassis and Aero) ooo S Alterations to Details. Aero Division. S. S.List and By.Special Section. SCD. Chassis Design(Experimental Section) ooo SCD Alterations to EXS.Details and Standards List. Sch. D.D.O.Schemes. SCT. Single Cylinder Sketches(Rm{William Robotham - Chief Engineer}/Ed{J. L. Edwards}) T. Tool Office(Turning) T. By.{R.W. Bailey - Chief Engineer} old Chassis drawings. U. By.{R.W. Bailey - Chief Engineer} old Chassis drawings. V.{VIENNA} Experimental Test (Single Cylinder Department) W. Cost Office. X. Experimental Nos. ooo X Alteration to Detail Drawings. Aero Division(X.Section) Y. Cost Office. Z. Building Department. Z. (This is also used as a Suffix for re-traced drawings.) | ||