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).
Exposed valve stems and tappets enclosure scheme for a 10,000 miles trial run on Chassis No. 12-EM.
| Identifier | Morton\M22\ img264 | |
| Date | 1st January 1924 | |
| EXPOSED VALVE STEMS & TAPPETS ON 40/50 - ENCLOSURE SCHEME CROWDED OUT TO H.M. FROM E.{Mr Elliott - Chief Engineer} Copy to B.J. H.S. re. 10,000 MILES TRIAL RUN. CHASSIS No. 12-EM. Pressure of work has prevented an earlier answer to your memo. HM{Capt. W. Hallam - Head Repairs}4/W9124. Regarding point 3. we think that we are giving you Mr. Royce's opinion in saying that nothing can be done on this particular model to cover in the valves. There is no information available as to how much of the wear is due to external dust, or to dust drawn in through the carburetter, or due simply to lack of lubrication. We suggest it would be worth while to test a gland of the Goshawk pattern on each valve stem with holes provided through the external member of the gland for occasional hand lubrication. Regarding point 4. we think this is a matter for the Exp. Dept. to report on. It appears that the rings could do with a slight increase in the clearance if no ill effects attended such an alteration. E.{Mr Elliott - Chief Engineer} Handwritten notes: At top right: CROWDED OUT Next to 'TRIAL RUN': X 4601 Right margin: of course proved the point & so collect dust that covers must be designed. Bottom of page: Either E is flanneling Hoareby or R has done a volte-face or E is covering up for him | ||