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).
New magneto drive designs for the 40/50 HP chassis, recommending a provision for a brake to solve noise issues.
| Identifier | ExFiles\Box 74\3\ scan0040 | |
| Date | 9th February 1920 | |
| R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X 3530 To R.{Sir Henry Royce} from Bn.{W.O. Bentley / Mr Barrington} Copy to CJ. " HS.{Lord Ernest Hives - Chair} " Da.{Bernard Day - Chassis Design} " Ck.{Mr Clark} Bn{W.O. Bentley / Mr Barrington}7/W9.2.20. X.3530 Re New Type Magneto Drives for 40/50 H.P. Chassis. With reference to the new designs of Magneto Drives:- (1) The fabric Coupling. (2) The serrated type of drive. We believe the question of some provision for a brake drum has been raised with you previously and you instructed us to omit any provision for the fitting of the brake. From the tests Mr. Hives has made, he finds that firstly some engines could not be made quiet without the brake, and secondly that it is not only a question of slack in Magneto Coupling but in the pinion driving the Magneto. We feel that it is very difficult to be sure that the old trouble which caused us to fit the brake is definitely cured and will never recur to production chassis, merely by testing one or two experimental cars, and we suggest that it is desirable for some provision to be made in the design so that the brake can be fitted at any time if this is found to be necessary. Bn.{W.O. Bentley / Mr Barrington} | ||