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 of 'L' section rings used in oil consumption experiments.
| Identifier | ExFiles\Box 72\1\ scan0005 | |
| Date | 3rd March 1925 guessed | |
| 'L' SECTION RINGS USED IN CONNECTION WITH E.A.C OIL CONSUMPTION EXPTS. .067 .0855 .138 .043 .085 .185. .150. .095 10/1 | ||