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).
Solutions for wear on valve stems and guides, including lapping, polishing, and adding covers.
| Identifier | ExFiles\Box 74\3\ scan0339 | |
| Date | 22th May 1924 | |
| X4432 X2764 BP. Hs.{Lord Ernest Hives - Chair} BY6/H.{Arthur M. Hanbury - Head Complaints} 22. 5. 24. WEAR ON VALVE STEMS ON GUIDES. ------------------------------ We have written the Works suggesting that it will be necessary, in our opinion, to lapp the inside of the valve guides before putting same into service. This should be done by a rotating spindle having end movement as well as rotational movement. By this scheme we think that we should obtain a polished surface on the valve guide which in combination with the carefully polished spindle, should materially affect the issue. In regard to your further point, possibly Hs.{Lord Ernest Hives - Chair} would make a special point of having valve guides of the hardness specified on our drawings, lapped out in this manner, on the four wheel brake cars before they start on their 10,000 miles trial run. In regard to the addition of covers over the valve guides, we are in communication with BJ. on this point, and are prepared to produce the necessary drawings with the information supplied from America, to enable us to get ahead rather than wait receipt of a finished cylinder from Springfield. BY.{R.W. Bailey - Chief Engineer} Ry | ||