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).
Comparing the performance, springing, and damping of the 14-EX and 8-EX cars.
| Identifier | ExFiles\Box 65a\1\ scan0381 | |
| Date | 1st June 1928 | |
| To B.J. from Hs.{Lord Ernest Hives - Chair} c. to R.{Sir Henry Royce} PN.{Mr Northey} c. to CWB. c. to C. c. to Sg.{Arthur F. Sidgreaves - MD} X7770 Hs{Lord Ernest Hives - Chair}3/LG2, 6. 28. 14-EX AND 8-EX CARS. With reference to BJ11/El.6.28. The difference in performance between 14-EX and 8-EX can be explained by the fact that 14-EX car has a lower gear ratio, 3 cwts. lighter car and more power due to higher compression: These factors increase the effective torque by 15%. Comparative tests taken over our standard test route shew 14-EX to give 16% better performance. 8-EX car, taking into account the weight and axle ratio, is up to the present standard Phantom performance. We hardly understand the remark - "that there is an entire inadequacy of damping on this car". The hydraulic dampers on 14-EX are set to a higher poundage than on the present standard car. If we increase that poundage, which we have done, we sacrifice comfort at low speeds. 14-EX car is identical as regards springing to what has been adopted for the 'SS{S. Smith}' car and therefore it is essential that we should come to some agreement that the springing is satisfactory without qualifications such as - unsatisfactory cushions, or insufficient damping. Would it be possible to arrange to return this car to London so that the rear seat upholstery can be made similar to what Sales are used to. As soon as 8-EX car is returned we will arrange to fit a 14-tooth axle and return it to you for further tests. Hs.{Lord Ernest Hives - Chair} | ||