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).
Blueprint for leaking high pressure valves with associated part numbers.
| Identifier | ExFiles\Box 55\4\ Scan246 | |
| Date | 27th May 1928 | |
| 9387 A.{Mr Adams} PART VIEW OF OIL GROOVE. SCALE 10/1. SQUARE CORNER. TWO SLOTS. .015 CHAMFER AT 45°. TABLE: VALVE P, WIDTH OF SLOTS 'W' .031, PART NUMBER AI2180. VALVE Q, WIDTH OF SLOTS 'W' .047, PART NUMBER AI2181. PART NUMBER AI2182 (faded). DIMENSIONS: .100 +10, .025 -10, .025R, .106 +1 -1, .150 DIA -10, WIDTH 'W' LIMIT +1, .250 DIA -10, .462 DIA ±2, 1.050 ±10, .925 -25, 45°, .050 R ±10, .037 ±10, .250 ±10, .161 DIA, 60°, .075 DIA +10. 1 GROOVE .050 WIDE X .015 DEEP +5. USE .375 DIA CUTTER. Stamped: JUL 6 1928. TITLE BLOCK: DRAWN BY.{R.W. Bailey - Chief Engineer} TRACED BY A.I.S. CHECKED BY W.H.K. APPROVED BY EWD. LIMITS. ROLLS-ROYCE OF AMERICA, INC. MODEL 40-50. SEC 7160. DATE 5-27-'28. WEIGHT. SCALE. HEAT TREAT. BRINELL. STANTON. MACHINE ALL OVER. MACHINE WHERE MARKED |||. TITLE: LEAKING HIGH PRESSURE VALVES. MATERIAL S/N. SPECIFICATION 206. NO. OFF 2. | ||