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 a stronger clutch stop spring.
| Identifier | ExFiles\Box 56\4\ Scan104 | |
| Date | 11th November 1927 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to NRC.{N. R. Chandler} X5650 With reference to the request for a stronger clutch stop spring. The spring which we have fitted successfully to experimental cars is to the following specification :- 8 working coils of 12 SWG. (.104") with two coils ground flat making 10 coils. Load when compressed to 1.100" = 40 lbs. Stress 57000 lbs/sq.in. [Diagram showing a spring with dimensions] FREE LENGTH: 1.575 INSIDE DIA.: .511 | ||