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 aero-engine designer Frank B. Halford requesting details on a tappet return spring and a hydraulic rocker.
| Identifier | ExFiles\Box 88\4\ scan0092 | |
| Date | 31th July 1934 | |
| FRANK B. HALFORD, F.R.Ae.S. DESIGNER OF AERO AND AUTOMOBILE ENGINES. Telephone Nos.: Gerrard 1217. Gerrard 1218. My Ref. FBH/EA Your Ref. Hs{Lord Ernest Hives - Chair}/Smth 24/KW. Messrs. Rolls Royce, Ltd., Derby. 8 & 9 GOLDEN SQUARE, LONDON, W.1. 31st. July 1934. SMTH Dear Sirs, I am much obliged for your letter of the 30th. instant, enclosing blue print. I now find that I require the following :- (1). Detail of Tappet return spring. (2). Detail of the Hydraulic rocker. Are the rockers now being machined out of the solid or has a die already been sunk? I am wondering whether you have any objection to the design of the rocker itself being modified? Yours faithfully, Frank B Halford | ||