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).
Requesting the conversion of large inlet valve head springs to a double taper valve spring assembly.
| Identifier | ExFiles\Box 17\6\ Scan123 | |
| Date | 9th June 1933 | |
| To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Std. X7060 Hs{Lord Ernest Hives - Chair}/Std.3/KT.9.6.33. Please convert valve springs of large inlet valve head E.83906 (at present fitted to P.II. No.25 unit) to double taper valve spring by fitting the following parts. (1) Hs.{Lord Ernest Hives - Chair}664 Outer Springs. (2) Hs.{Lord Ernest Hives - Chair}665 Inner Springs. (3) Ex.8897 Bottom Washers. (4) Ex.8895 Bottom Washers Inner. (5) Ex.8896 Top Washers. (6) Inlet Guides to E.82958. (7) Exhaust Guides to Hs.{Lord Ernest Hives - Chair}1036 (modification of E.83094 attached). The above scheme is Lec.3136 and was fitted to P.II. No.25 unit in 19.EX. chassis (see memo ref: RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel}4/LS.18.8.32). The above parts, except for the valve guides, are existing and are at present in the engine erecting shop. This alteration is required as soon as possible. Hs{Lord Ernest Hives - Chair}/C.S.Steadman. | ||