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).
Specification for an experimental plunger spring.
| Identifier | ExFiles\Box 106\5\ scan0098 | |
| Date | 9th September 1933 guessed | |
| SPECIFICATION OF EXP. PLUNGER SPRING. Rectangular wire. .072" x .028" No. of coils. 6.5 + 2 Mean rad. .222" Load in position. 4.75 lbs. Length in position. .350" Length free. .800" Stress, normal. 71,000 lbs/sq.in. " max. 85,000 " " Total coil clearance. .036" Rate/1" 9.5 lbs. | ||