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).
Test report for ribbon valve shrings.
| Identifier | ExFiles\Box 80\3\ scan0128 | |
| Date | 2nd January 1912 | |
| R.R. 512 (2½ H) X. 488. 2.1.12.) G 2273. *494 X290 604. Section Description "Ribbon valve shrings. to test." Date | Miles | REPORT 10-7-12 | | Fix on jig. 13-7-12 | | 1 Exhaust 1 Inlet. Broken after 51 & 50. hours running rocker. Shring. E2582. Washer. E2615 Reported to EP{G. Eric Platford - Chief Quality Engineer} taken off list rig. | ||