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).
Standardisation sheet for the Low Inertia Spring Drive incorporated with the balanced crankshaft.
| Identifier | ExFiles\Box 103\3\ scan0145 | |
| Date | 5th January 1932 | |
| X5020. To By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}5/KT.5.1.32. LOW INERTIA SPRING DRIVE. X5010 We are issuing a standardisation sheet for the Low Inertia Spring Drive incorporated with the balanced crankshaft. The following are the springs used and the loadings needed :- Driving Springs Hs.{Lord Ernest Hives - Chair}469a, outer Hs.{Lord Ernest Hives - Chair}486, inner load 17 lbs at 17.5" radius. Damping Springs E.56208, free length .725", 4 springs to be left out, as per Grylls. Friction load 15 - 16 lbs. at 17.5" radius. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||