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).
Experimental log for an oil-retaining clutch coupling.
| Identifier | ExFiles\Box 5\5\ 05-page03 | |
| Date | 17th October 1911 | |
| alt. R.A.F. XS12 X866 Section. 1000 DESCRIPTION:- Experimental Clutch Coupling (oil retaining) Date sheet from office. 17-10-11 Date received. 30-10-11 Date Works instruction. 30-10-11 Material received. Reported T.D. office. Reported to office. Date. | Miles. | Report. 27/11/11 | | Wait material 6/12/11 | | Testing on 1708 8/12/11 | | to test on standard conditions. at date works for new thrust & c. to be fitted on single plate. 13/12/11 | | Waiting for new coupling. 15/12/11 | 210 | Ditto. to fit. to 1731 before going away. Eagle Date. | Miles. | Report. 21/12/11 | | Waiting for oil tubes 28/12/11 | | One only received fitted to 1809 1/1/12 | | Waiting for drive coupling 2/1/12 | | One only recd & fitted. Winter [illegible] 31/12/12 | | Waiting for others 24/2/12 | | One fitted to 1918. 26/2/12 | | Report from Mr. Hives in his R.{Sir Henry Royce} type file 3-12 | ||