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).
Proposed modification to the 20/25 HP crankshaft balance weights.
| Identifier | ExFiles\Box 103\3\ scan0118 | |
| Date | 2nd October 1931 | |
| Y 5010. To Ev.{Ivan Evernden - coachwork} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/ADL.2.10.31. 20/25 HP. CRANKSHAFT BALANCE WEIGHTS. With reference to Lec.2963, it seems to us highly undesirable that the studs should be able to unscrew even to the extent of 1/10th of an inch. A simple method of overcoming this difficulty appears to make the retaining nut castellated and lock it to the balance weight by means of the existing tab washer and to the stud by means of a split pin. We suggest that the scheme should be detailed in this manner unless you feel it necessary to take the matter up with W.W. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||