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).
The comparative wear of Phosphor Bronze (P.B.) versus cast iron valve guides after 12,000 miles.
| Identifier | ExFiles\Box 74\3\ scan0343 | |
| Date | 21th August 1924 | |
| 21.8.24. 40/50 VALVES AND VALVE GUIDES. X. 2764. We attach a report in connection with P.B. Valve Guides fitted to a car which has run 12,000 miles in France. At the same time we had another car running fitted with cast iron Guides. The P.B. shewed very much less wear - it will be seen the wear is negligible after 12,000 miles. Hs.{Lord Ernest Hives - Chair} attc. RHC{R. H. Coverley - Production Engineer}3/LS20. 8.24. | ||