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 an overdrive cone insert that has spun within the outer cone.
| Identifier | ExFiles\Box 136\2\ scan0367 | |
| Date | 22th July 1943 guessed | |
| OVERDRIVE CONE INSERT WHICH HAS REVOLVED IN OUTER CONE | ||