Blueprint with specifications for an upward/low pressure valve and a high pressure/rebound valve.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan207 | |
| Date | 20th January 1931 guessed | |
| SHEET 9. UPWARD OR LOW PRESSURE VALVE. ANNULAR CLEARANCE AT A .282 - .243 = .039" SHROUDED VALVE LIFT .125" 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 .037" 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).