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, detailing the required springs and loads.
| Identifier | ExFiles\Box 103\3\ scan0144 | |
| Date | 1st January 1932 | |
| To By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} x5010. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}5/KT.5. 1. 32. LOW INERTIA SPRING DRIVE. x5020. 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} | ||