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).
Listing the allowances for engine timing and camshaft inspection inaccuracies and their potential causes.
| Identifier | ExFiles\Box 43\3\ Scan171 | |
| Date | 8th April 1928 guessed | |
| contd :- -3- (1) Allowance when timing engines, roughly 2° (crankshaft) either way. (2) Allowance for error with regard to setting pointer, roughly 1° (crankshaft) either way. (3) Cam angularity allowance when camshafts are inspected, 2° (crankshaft) either way. Assuming all the above inaccuracies were the same way and did not tend to cancel out - 5° (crankshaft) can be accounted for. Any other discrepancy must be attributed to inaccuracies in grinding on the camprofiles - such as would occur before changing the master cam follower, when the grinding wheel has worn down to the limit allowed. Hs{Lord Ernest Hives - Chair}/V.Halliwell. | ||