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).
Photographs of a Cambridge Portable Vibrograph and an Askania Vibrograph, related to a report on 'Wraith' crankcase vibration.
| Identifier | ExFiles\Box 138\2\ scan0174 | |
| Date | 13th September 1938 | |
| Fig. 11. 6 x 17 x 5 inches, 8 lbs. FIG 1A. CAMBRIDGE PORTABLE VIBROGRAPH. FIG 1B. ASKANIA VIBROGRAPH. A SET OF PHOTOGRAPHIC ENLARGEMENTS REFERRING TO "WRAITH" CRANKCASE VIBRATION HAVE BEEN FORWARDED WITH A REPORT ON THIS SUBJECT DATED 13:9:38. L./ HWS. | ||