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 dimensions for two similar ring-like components.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page260 | |
| Date | 19th April 1933 guessed | |
| Top Drawing: .015 CHFR AT 45° OTHER DIMENSION'S TO E 100037 SCALE 4/1 2.705 DIA -10 Hs{Lord Ernest Hives - Chair} 945 Bottom Drawing: OTHER DIMENSIONS TO E1000 SCALE 4/1 2.715 DIA 2.725 DIA Hs{Lord Ernest Hives - Chair} 949 | ||