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).
Materials for 40/50 chassis magneto gears, addressing issues of noise and wear.
| Identifier | WestWitteringFiles\M\October1924-December1924\ Scan13 | |
| Date | 10th October 1924 | |
| TO BY FROM R.{Sir Henry Royce} Copy to - HS.{Lord Ernest Hives - Chair} ORIGINAL X.4181/cre. 40/50 CHASSIS MAGNETOS. X.4648. In reply to your memos. concerning the above, we have been using magnetos now for a very long time, and I do not see any reason why these should suddenly be worse as regards noise. There have been many attempts at using fibre wheels or pinions, but none of these so far as we know have ever been adopted. We look upon them with suspicion because of the effect of humidity for one thing. I should like to know on the other hand if helical gears have been tried - single helicals would do for this light job. We must have good wearing materials for these gears, not subject to hydroscopic effects, and therefore it appears to me that we can only use either gun metal or steel in preference to aluminium and bakelite. A steel wheel would be lighter than a bronze wheel for the distributor, and should think worth trying. The only suggestion put forward by Messrs Norths' that we really think is of any use is the eccentric adjustment to take up the slack in the first instance, and we should have thought this would be all that is necessary, if the wearing qualities were good. With regard to passing modifications I should not trust to Messrs Norths' tests, but try the effect of a longer run than 130 hours. These gears must be thoroughly good for many years, reliable and without wear. This I doubt if aluminium and bakelite were adopted. [STAMP] RECEIVED | ||