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).
The standardization and balance of crankshafts for the 20/25 model 10,000 miles test.
| Identifier | ExFiles\Box 103\3\ scan0184 | |
| Date | 5th January 1934 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} X 5010 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}7/KW5.1.34. Crankshaft for 20/25 10,000 miles Test. ------------------------------------- We recently standardised the Bentley crankshaft for the 20/25, and this crankshaft only has 62% balance as compared with the 80% of the 20/25. As owners of 20/25 cars never run their engines up to 4,500 revs., we think they can safely have bigger balance weights to give the original amount of balance. We think these weights will have to be overhanging ones, so as not to foul the crankcase. We shall be glad therefore if you would issue a drawing of suitable weights. Hs{Lord Ernest Hives - Chair}/H.{Arthur M. Hanbury - Head Complaints} Grylls. | ||