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 and test details of a fractured O.H.C. Unit Rocker.
| Identifier | ExFiles\Box 113\5\ scan0203 | |
| Date | 19th October 1937 guessed | |
| B.23 O.H.C. Unit. Rocker R.S.122 S/ZN. No.2 inlet. Total running time :- 176 Hrs. including 25¾ Hrs. at full throttle, and 4275 miles in 56 BN.{W.O. Bentley / Mr Barrington} | ||