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).
Instruction detailing tappet clearances for the 40/50 HP Series J engine.
| Identifier | ExFiles\Box 158\4\ scan0015 | |
| Date | 19th July 1929 | |
| X3733 Mx{John H Maddocks - Chief Proving Officer}/McM7/T19.7.29.. Instruction No. 233.. Re 40/50 HP . Tappet clearance. The tappet clearance for normal running Series J engine is .003" For timing purposes .020" and [handwritten] o/k Inlet for dynamometer only .006". Mx.{John H Maddocks - Chief Proving Officer}. | ||