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 detailing inlet and exhaust valve timing diagrams for silent tappets.
| Identifier | ExFiles\Box 17\6\ Scan344 | |
| Date | 21th March 1919 | |
| LOAD MARKED ON DRGS TAKEN AT THIS POINT INLET VALVE TIME 7.4° B.T.D.C. TDC 5 LBS LOAD 3 LBS 1.0 1/2 LBS CONSTANT LOAD OF 5 LBS NO LOAD RECORDED 52.7° I.C. 1 LB 1 1/2 LBS 2 LBS 3 LBS 4 LBS 6 1/4 LBS 18 LBS 27 LBS 32 LBS 33 LBS 32 LBS 26 LBS B.D.C 21 LBS 16 LBS 13 LBS 10 LBS 8 LBS 6 1/4 LBS CHANGE OVER 5 LBS 1 DIVISION = 7.44° EXHAUST VALVE TIME A.T.D.C. TDC 20 LBS E.C. 12 LBS 8 1/2 LBS 7 LBS 6 LBS 4 1/2 LBS 3 LBS 2 LBS NO LOAD 1/2 LBS E.O. 1 LB 1 3/4 LBS 2 LBS 3 LBS 3 3/4 LBS 4 LBS 1 DIV. = 7.4° B.D.C. CONSTANT LOAD OF 5 LBS 5 LBS 6 LBS 7 1/2 LBS 9 1/2 LBS 11 1/2 LBS 14 1/2 LBS 18 LBS 21 1/2 LBS 26 LBS 31 LBS 48° 86° CHANGE OVER 5 1/2 LBS SILENT TAPPETS - 40/50 28-EX ROLLS-ROYCE LTD. PRINT ROOM MAR 21 1919 DERBY. | ||