Blueprint of a 'Driving Plate', detailing hole patterns and machining requirements.
| Identifier | ExFiles\Box 97\2\ scan0174 | |
| Date | 10th December 1940 | |
| R.R. 773 (10H) (938) 30-10-39) P.Y RG {Mr Rowledge} 1923 PRODUCED FROM GB4588 ALL MACHINED FACES MUST BE PARALLEL 4 HOLES SHOWN ARE EXISTING BUT NOT TO BE USED TEN HOLES DRILLED AS SHOWN .1875 DIA +5 2 HOLES SHOWN ARE EXISTING AND ARE TO BE UTILIZED 6.000 DIA +1 -0 39° +2 -2 12° +2 -2 REPLACE ALL COPIES TO EXP. P DRKS PATT. T.O. FORGE D.O. 1. S.R. T.D. R.D. DRAWN L. ROWLAND TRACED COST CHECKED SNAW. APPROVED LIMITS O.K. DATE 10.12.40 USED ON No.OFF SECTION EXP 1 SIBO SCALE 1/1 ALL DIMENSIONS ARE EXPRESSED IN INCHES. ALL LIMITS IN THOUSANDTHS OF AN INCH. MACHINE ALL OVER OR WHERE MARKED THUS HEAT TREAT BRINELL TITLE DRIVING PLATE STANTON MATERIAL S/MD SPECN. No. 239A STAMP: ROLLS-ROYCE LTD. PRINT ROOM 10 DEC 1940 DERBY. | ||
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).