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).
Engineering drawing of a Sump and Cylinder Head for a 3 1/2 Litre S.S. engine.
| Identifier | ExFiles\Box 126\5\ scan0137 | |
| Date | 8th March 1938 guessed | |
| 3 1/2 LITRE S.S. SUMP. S.S. 8 11.250 9.700 9.200 2.450 2.093 .175 1.550 1.750 5.200 3.450 1.046 1.046 1.046 2.0312 1.0312 1.0312 1.0312 .8437 14 RIBS CYL HEAD. S.S. 85 SECTION 'A'A' | ||