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).
Results of testing increased friction on a Phantom starting carburetter needle.
| Identifier | ExFiles\Box 66\3\ scan0213 | |
| Date | 2nd February 1927 | |
| Y8280 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}1/LG7. 2. 2. 27. RE. PHANTOM STARTING CARBURETTER. BY/CS7/BB13.1.27. We have tested this design for increased friction on the carburetter needle. Our views are that whilst increased friction has been obtained, we are doubtful whether the locking collar will retain its springiness. We believe that if the head happens to be out of truth with the thread, after a time it will take a permanent set. We suggest that a stronger spring could be used on the present scheme or a simple lock nut similar to that which will be fitted to the new starter carburetter. We are of the opinion that complaints of the needle becoming unadjusted must have a slack thread otherwise we have found the spring tension quite sufficient. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||