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).
Summary of test bed measurements for seven different existing camshafts.
| Identifier | ExFiles\Box 102\5\ scan0126 | |
| Date | 18th April 1932 | |
| SHEET I ALL DURATIONS ACTUALLY BY TEST BED MEASUREMENT HS{Lord Ernest Hives - Chair} 585 ALFA ROMEO Circle 1: 27 10.8, EX, IN, .020 CLCE, 55.5, 40 INLET 233 EXHAUST 230.8 112° EXP CAMSHAFT W.W. E.57177 TWO EXHAUST CAMS Circle 2: 0 3.5, EX, IN, .020, 49, 50 INLET 229 EXHAUST 233.5 110.5° W.W. E.57177 FOR CHINA Circle 3: 6, EX, IN, .020, 40.5, 44 INLET = 213.5 EXHAUST = 230 J III SHAFT Circle 4: 7, EX, IN, .020, 40, 41.2 INLET DURN = 213 EXHAUST DURN = 228.2 114° P II 2.2 2.5 Circle 5: E 82448, EX, IN, .020, 52, 49 INLET 230 EXHAUST 236 OLD STANDARD P II 116° 22 12.6 Circle 6: EX, IN, .020, 46.1, 50 INLET 213.6 EXHAUST 228 R.{Sir Henry Royce} ENGINE CAMS 110° SHAFT 17 18.6 Circle 7: EX, IN, .020, 53.5, 56 INLET 256.5 EXHAUST 254 SUMMARY OF EXISTING CAMSHAFTS P II J III 25 H.P. RM.{William Robotham - Chief Engineer} 18.4.32 | ||