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).
Design of Phantom induction pipes and tappet clearance issues with aluminium cylinder heads.
| Identifier | ExFiles\Box 13\3\ 03-page035 | |
| Date | 30th May 1928 | |
| BJ. from Hs.{Lord Ernest Hives - Chair} c. to Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} c. to C. SG.{Arthur F. Sidgreaves - MD} c. to PN.{Mr Northey} CWB. X7071 Hs{Lord Ernest Hives - Chair}4/LG30.5.28. PHANTOM INDUCTION PIPES. X7070 X7050 V8070 We visited WW. on Friday last to discuss with R.{Sir Henry Royce} the difficulties which might arise if we rushed into production on the weir or slotted type of induction pipe. It was agreed that the experimental information was not complete and therefore we were not in a position to instruct a design which was certain to be satisfactory. R.{Sir Henry Royce} wired the Works to proceed with the original design. The new induction pipe is to be fitted to 12-EX and run 10,000 miles in France before it is standardised. We have had considerable experience with the pipe which is to be used and know that the results will be at least equal to the previous Phantom pipe. We also discussed with R.{Sir Henry Royce} the point that on the Phantom with the alum. head when warming the engine, the cylinder head expands at a greater rate than the tappet rod which causes the tappet clearance to be increased for a short period until the tappet rod reaches the normal temperature. Once the rods reach the normal temperature, the clearances are O.K. Hs.{Lord Ernest Hives - Chair} | ||