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 comparing four alternative engine valve timings for Japan III, Peregrine, and Bensport cam forms.
| Identifier | ExFiles\Box 102\5\ scan0127 | |
| Date | 18th April 1932 | |
| SHEET II Hs{Lord Ernest Hives - Chair} 586 JAPAN III T.D.C. 8° EX 48 IN 45° .020 CLCE TOE OF INLET CAM TO BE SHORTENED AS FAR AS POSSIBLE. INLET DURN 228 EXHAUST DURN 233 110° SHAFT PEREGRINE 3 8 EX 45 IN 42 .020 CLCE INLET DURN = 180 + 42 = 222 EXHAUST " = 180 + 52 = 230 T.O.C.8 EX 50 IN 42 .020 INLET DURN = 230 EX DURN = 230 BENSPORT T.D.C 10 EX 55 IN 45 .020 CLCE INLET DURN 180 + 52 = 235 EXHAUST " 180 + 55 = 235 T.D.C 10 THIS ALMOST EXACTLY REPRODUCES THE ALFA EX 55 IN 40 .020 INLET = 235 EX. = 230 THREE CAM FORMS GIVE FOUR ALTERNATIVE TIMINGS. RM.{William Robotham - Chief Engineer} 18.4.32 | ||