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).
Performance comparison graph of B.HP vs R.P.M. for the Goshawk II engine, detailing standard and experimental camshafts.
| Identifier | WestWitteringFiles\K\July1923\ Scan65 | |
| Date | 21th August 1923 guessed | |
| GOSHAWK II STANDARD AND EXPERIMENTAL CAMSHAFT. ENGINE B GII 45° VALVE SEATS. BATTERY IGNITION. ENGINE WATER AT 80°C. SILENCER FITTED BOTH CURVES OBTAINED UNDER THE SAME CONDITIONS. B.H.P R.P.M. STANDARD CAMSHAFT EXPERIMENTAL CAMSHAFT VALVE TIMING WITH STANDARD CAMSHAFT IS AN AVERAGE OF PRESENT PRODUCTION PRACTICE. INLET I.O 10° I.C 50° EXHAUST E.C. 5° E.O. 48° EXPERIMENTAL CAMSHAFT HAS STANDARD CAM CONTOUR BUT THE EXHAUST CAM LEADS ITS INLET CAM BY 110° AS COMPARED WITH 118° ON THE STANDARD CAMSHAFT. BEST TIMING WITH THIS CAMSHAFT. INLET I.O 10° I.C 38° EXHAUST E.C. 3° E.O. 44° | ||