Blueprint showing cross-sections and specifications for a low pressure and high pressure valve.
| Identifier | ExFiles\Box 28\1\ Scan218 | |
| Date | 17th February 1931 guessed | |
| SHEET 9. UPWARD OR LOW PRESSURE VALVE. ANNULAR CLEARANCE AT A .282 - .243 = .039' SHROUDED VALVE LIFT .125' .037' VALVE LETTER C. OUTER SPRING RATING 238 LBS/IN INNER SPRING RATING 14.8 LBS/IN. LIGHT SPRING 'SET UP' .088 VALVE LIFT BEFORE HEAVY SPRING COMES INTO OPERATION .037 ANNULAR LEAK THEN ABOUT .085 LONG HIGH PRESSURE OR REBOUND VALVE. ANNULAR CLEARANCE AT B .282 - .275 = .007' VALVE LETTER C SPRING RATING 103.5 LBS/IN. VALVE LIFT BEFORE PORT EXPOSED .020 APPROX. | ||
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).