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).
Drawing showing the cylinder spacing and bore dimensions for the Wraith engine.
| Identifier | ExFiles\Box 124\3\ scan0341 | |
| Date | 19th March 1935 guessed | |
| WRAITH - CYL SPACING 3" BORE 3.275 OD 3.875 4.250 3.875 4.500 3.875 4.250 3.875 SCALE 1/4 | ||