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).
Production strategy and preference for different bevel gear ratios for the rear axle.
| Identifier | ExFiles\Box 49\1\ Scan285 | |
| Date | 17th March 1921 | |
| X.3457 SFT.{Mr Swift} from BY.{R.W. Bailey - Chief Engineer} c. to Ws. c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to HS.{Lord Ernest Hives - Chair} BY1/P17.3.21. CHASSIS - REAR AXLE. X.3545 X.3457 In producing Bevel Gears at the works here, it is most important for us to concentrate on the production of the 15/52 ratio than it is the 16/52, owing to the fact that the general opinion in the Test and Experimental Dept. is that the 15/52 ratio is a better all round proposition for the car. In view of this therefore, and since we have also got quite a fair number of 16/52 bevels which have been cut at E.N.V's., for the present we should concentrate on producing 15/52, in the works, and when these are available, they should be fitted to standard chassis, as the ratio has already been standardised, but at the same time it was considered best to use it only for American, Colonial and heavy cars. At present, however, the result of our experience is that it is considered a better all round proposition. X.4299 In regard to the 14/52 ratio, as soon as we have satisfied ourselves with this particular ratio of bevels in regard to quietness, we shall then place a definite order for a certain number which will have to be used on heavy cars only. BY.{R.W. Bailey - Chief Engineer} | ||