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).
Request for the acquisition of two types of springs with detailed specifications.
| Identifier | ExFiles\Box 6\1\ 01-page074 | |
| Date | 24th October 1927 | |
| X6993 X5020 To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Tsnl. Hs{Lord Ernest Hives - Chair}/Tsnl/LG24.10.27. [Handwritten and crossed out: Y6354] We should be glad if you will obtain for for us 8 off each of the following springs - not to be enamelled. (SPRING RATE = 30 lbs/in.) Wire dia........................... .064" (16 S.W.G.) No. of coils (end thickness)..... 8½ No. of coils effective........... 6.7 Free length........................ 1.100" Solid length....................... .528 + 1S Force when depressed .500"....... 15 lbs. ± 1 Inner dia.......................... .436" Outer dia.......................... .564" Mean dia........................... .500" (SPRING RATE = 90 lbs/in.) Wire dia........................... .080" (14 S.W.G.) No. of coils (end thickness)..... 7 No. of effective coils........... 6.45 Solid length....................... .560" + 1S Force when depressed .500"....... 45 lbs. ± 1.5 Free length........................ 1.100" Inner dia.......................... .420" Outer dia.......................... .580" Mean dia........................... .500" --------------------- Hs{Lord Ernest Hives - Chair}/S.S.Tresilian | ||