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).
Blueprint LeC.3662, detailing an experimental cast iron head for a Bentley.
| Identifier | ExFiles\Box 86\1\ scan0029 | |
| Date | 7th October 1933 | |
| To RHC.{R. H. Coverley - Production Engineer} from E/JNR.{Charles L. Jenner} X219. E/JNR.{Charles L. Jenner}6/HP.7.10.33. c. Hs.{Lord Ernest Hives - Chair} re Bentley. We send you herewith blueprint LeC.3662 shewing an experimental cast iron head modified for experimental purposes to try out the 1.2" diameter exhaust valve with the 30° valve seat. Compression ratio is arranged for 7 to 1. To make the casting it will be necessary to alter the same cores adjacent to the floor of the head. E/JNR.{Charles L. Jenner} | ||