Allowances and potential inaccuracies in engine timing and camshaft grinding.
| Identifier | ExFiles\Box 33\4\ Scan092 | |
| Date | 10th October 1927 guessed | |
| contd :- -3- (1) Allowance when timing engines, roughly 2º (crankshaft) either way. (2) Allowance for error with regard to setting pointer, roughly 1º (crankshaft) either way. (3) Cam angularity allowance when camshafts are inspected, 2º (crankshaft) either way. Assuming all the above inaccuracies were the same way and did not tend to cancel out - 5º (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. | ||
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).