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).
Endurance test report detailing the condition of engine tappets after running.
| Identifier | ExFiles\Box 96\2\ scan0265 | |
| Date | 2nd November 1937 guessed | |
| -4- 1 hours endurance at 4500 R.P.M. Tappet Nos. Condition of tappets. _________________________________________________________________ B.1. A.4. Lightly scratched. Groove hardly perceptible. B.12. Scratched surface B.5,8,9,11. ) Lightly scratched Groove .025" wide. A.1,5,8,9,12.) A.2,11. Scratched surface Groove .050" wide. A.3,10.B.3,4,10. " " Several flats approx. .075" A.6,7. B.2,6,7. " " Deep groove .100" - .125" wide. At the end of each hours endurance A.3 and 4 and B.3 and 4 tappets, were retained, and replaced by new tappets. Cast iron tappets fitted to Nos. 3 and 4 blocks remaining standard tappets in A side. - A.1 in A.2 and A.2 in A.1. B. side as run throughout tests. Condition of tappets after 3 hours running and further 1 hour at 4000 B.7,8,3,4. Good surface, groove hardly perceptible. A.3,4,7,8. Good surface, groove .050" wide. | ||