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).
Complete specification drawing showing three figures with cross-sections of grooved or ribbed plates.
| Identifier | ExFiles\Box 154a\2\ scan0353 | |
| Date | 22th June 1921 guessed | |
| 532,698 COMPLETE SPECIFICATION 1 SHEET [This Drawing is a full-size reproduction of the Original.] N t 4 5 A FIG.1. N 6 7 8 A FIG.2. N 9 A FIG.3. Malby & Sons, Photo-Litho. | ||