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).
Wear analysis blueprint of a tappet lever from a petrol pump endurance test.
| Identifier | ExFiles\Box 179\3\ img092 | |
| Date | 17th March 1932 | |
| 17-3-32 BADLY WORN. LIGHTLY WORN SECTION XX WEAR ON CONTACT FACE OF E52616 TAPPET LEVER. TIME RUN 470 HOURS 15 MINS. LEC 2361. PII PETROL PUMP ENDURANCE TEST. .250 .200 .350 .601 .105 4B | ||