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 the condition of Hall's Metal main bearings after 13,000 miles of use in France.
| Identifier | ExFiles\Box 114\2\ scan0227 | |
| Date | 26th November 1935 guessed | |
| Unit,-B.18 (3.5" Bore) 6.8:1 COMPRESSION RATIO. CHASSIS B.56 B.N. HALL'S METAL MAIN BEARINGS AFTER 13,000 MILES IN FRANCE. <- 1 to 7 -> | ||