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).
Recommendation to alter the thickness of the 4 Port Induction System pipes for the Phantom III model.
| Identifier | ExFiles\Box 93\4\ scan0087 | |
| Date | 17th November 1936 | |
| 319. Swdll to Lee BI. c. HGW. FHC. RM.{William Robotham - Chief Engineer} E/Lid.{A. J. Lidsey}3/HP.17.11.36. 4 Port Induction System. On looking over our designs we find that the present standard Phantom III induction pipes, and also the induction pipes for the 4 port cylinder head (LeC.4240) are instructed to be .150" thick whereas the standard 25/30 HP. pipe is .125" thick. There does not appear to be any reason why the half pipes for the Phantom III 4 port head should be thicker than .125 and we recommend that the details be altered accordingly. This alteration should be put through quickly and tested out with the idea that the four port induction system can be started off on production with the thin pipes. It is not thought to be a difficult job to alter the existing patterns. E.{Mr Elliott - Chief Engineer} | ||