Calculations and diagrams for an improved camshaft for China.
| Identifier | ExFiles\Box 5a\1\ 01-page252 | |
| Date | 3rd December 1931 guessed | |
| XS 770 IMPROVED CAMSHAFT FOR CHINA(Experimental Engine). X5090. [Diagram 1 text] Ex. 10 11 In 40 39 EXHAUST 104° BTDC [Diagram 2 text] Ex. LEADS INLET BY 107.5° INLET CAM CENTRE 111° ATDC Inlet cam centre (180 - 34) / 2 = 6° A.T.D.C. = 111° A.T.D.C. Exhaust Cam centre (180 - 50) / 2 = 11° B.T.D.C. = 115 - 11 = 104° B.T.D.C. ∴ Angle between cams on camshaft is equal to (111 + 104) / 2 = 107.5° And this should give required timing as above. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).