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).
Letter discussing engine modifications regarding valve and port sizes, speed, and brake adjustments.
| Identifier | ExFiles\Box 90a\2\ Scan019 | |
| Date | 26th May 1934 | |
| X7962 TELEPHONE: 2 LINES, No. 565 and 566. TELEGRAMS: "FORT DOUGLAS, MAN." LISTED A.A. AND R.A.C. HOTEL. Fort Anne Hotel, Douglas, Isle of Man. May 26th /34. Dear Robotham, Very many thanks indeed for your two letters of May 23rd + 24th. Regarding your question "can we fit larger valves if we do not enlarge the port size", is an internal modification which permits the ports being enlarged + polished if you so wished. Your suggestion to give me a set speed with a 50 M.P.H. maximum is ideal + should in turn give a maximum on 2nd gear of 73/75 approx. I think it would be as well to carry out the adjustments to the brakes right away + then I can try them out. | ||