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 showing a cross-section and inverted plan of a cylinder head for a new 2-litre Opel engine.
| Identifier | ExFiles\Box 148\3\ scan0241 | |
| Date | 21th June 1937 guessed | |
| ¢ OF PLUG INVERTED PLAN OF COMBUSTION CHAMBER CYLINDER HEAD NEW 2 LITRE OPEL ENGINE | ||