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 and specification for plunger return springs for the Phantom III.
| Identifier | ExFiles\Box 96\2\ scan0072 | |
| Date | 14th October 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} X324 Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}7/KW.14.10.35. Phantom III. Will you please have made 4 dozen (2 sets) of plunger return springs to E.87554. The details of the springs are - Rectangular Wire .080" x .032" No. of coils 6.5 + 2 Mean radius .218" Load in position 7 lbs. Length in position .375" Free length .800" Stress, normal 71,000 lbs/sq.in. Stress, maximum 88,000 " " Rate 16.5 lbs/1". Total coil clearance (min.) .014". Hs{Lord Ernest Hives - Chair}/L.H. Swindall. | ||