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 from Frank B. Halford requesting technical data on valve acceleration for a hydraulic rocker.
| Identifier | ExFiles\Box 88\4\ scan0091 | |
| Date | 30th July 1934 | |
| FRANK B. HALFORD, F.R.Ae.S. DESIGNER OF AERO AND AUTOMOBILE ENGINES. Telephone Nos.: Gerrard 1217. Gerrard 1218. 8 & 9 GOLDEN SQUARE, LONDON, W.1. My Ref. FBH/EA Your Ref. Hs{Lord Ernest Hives - Chair}/Smth/KW (Exp. Dept.) 30th. July 1934. Messrs. Rolls Royce. Ltd., Derby. Dear Sirs, Further to my letter of the 28th. instant, I am anxious to stress out thoroughly the lightened hydraulic rocker, etc. which I am now working on. Will you kindly let me know what the maximum positive acceleration is on the valve, when running at 5,000 r.p.m? Yours faithfully, Frank B. Halford | ||