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).
Standardisation of a 14/52 axle ratio to increase performance.
| Identifier | ExFiles\Box 171\1\ img124 | |
| Date | 28th November 1927 | |
| RR 755 REVISED (10M) (DE 649 9-12-26) BM. 2/1157. ORIGINAL COMPLETED 23.12.27 STANDARDISATION of CHASSIS PARTS. Date 28.11.27 Description of Parts. 14/52 AXLE RATIO. X No. 8350 Drawing No. 1725 Origin. To increase performance. Part List Experimental Test Report. We frequently receive complaints of lack of acceleration. This becomes more important as the amount of traffic increases. The 14/52 axle ratio was standard on Silver Ghost and is used on USA. Phantom cars. It is recommended for heavy cars only. Road Test Report. The gears will be identical to those used on the Silver Ghost. There is very marked increase in acceleration with this axle ratio. A Scrap and replace at all costs, including Chassis already delivered to Customers. B Scrap and replace on Chassis in Works. C Scrap present stock and replace on all Chassis not yet handed to test. D Use existing stock Alteration effective on future Chassis. Weight of Old Part. Cost of Old Part. £ Weight of New Part. Cost of New Part. £ Difference per Car. Difference per Car. £ Signature from Cost Dept. that above is correct. Cost of Parts in Works which will be scrapped if commenced on:- Series.........£....... Series.........£....... Series.........£....... INITIAL | DATE | REMARKS BJ. | 23.12.27 | Agreed. B.J. R.{Sir Henry Royce} | 1/12/29 | Agreed R.{Sir Henry Royce} WOR.{Arthur Wormald - General Works Manager} | 29.11.27 | Agreed. Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 29.11.27 | Agreed. RG.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 3.12.27 | Agreed. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 5.12.27 | Agreed. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 30.11.27 | Not agreed - engine harshness, roughness and noises are accentuated. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 1/12/27 | Agreed E.{Mr Elliott - Chief Engineer} PN.{Mr Northey} | 29.11.27 | Agreed. PN.{Mr Northey} CWB. | 8.12.27 | Agreed. CWB. HS.{Lord Ernest Hives - Chair} | 28.11.27 | Agreed. Hs.{Lord Ernest Hives - Chair} [Green stamp across document: ALPHA] | ||