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).
Petrol and oil consumption test results with valve timing data for cylinders 1 and 6.
| Identifier | ExFiles\Box 169\4\ img149 | |
| Date | 25th March 1933 | |
| FILES. 25.3.33. 3.Per.II. Petrol cons. Test over 170.5 miles, average speed 42.5 m.p.h. (Twin S.U. Carbs.) X.l needles used = 15.45 m.p.g. Oil Cons. test shews .. 412 m.p.g. Average air temp. 13°C. Valve timing with .020" tappet clearance. No.1 cyl. I.O. 3.5° BTDC. I.C. 38.5° ABDC. E.O. 37.5° BTDC. E.C. 8° ATDC. No.6 cyl. I.O. 3.5° BTDC. I.C. 40° ABDC. E.O. 36° BTDC. E.C. 7.5° ATDC. F.Dodd. | ||