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).
Photograph showing a fractured clutch pressure plate after a vibrating rig test.
| Identifier | ExFiles\Box 129\3\ scan0025 | |
| Date | 16th December 1938 | |
| Handwritten on file: X1110 Text on label: Borg & Beck BL4/CATT. 16/12/38 36/21/DS BORG & BECK CLUTCH PRESSURE PLATE AFTER 95 HOURS VIBRATING RIG. TEST 120 MINS. @ 4800 R.P.M. WITH STD. DAMPERS 120 MINS. @ 4500 R.P.M. 5 MINS. @ 4800 R.P.M. Cast on part: BORG & BECK PAT. NO. LEAMINGTON SPA. ENG. | ||