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).
Damper modifications, oil capacity, and heating issues for Bentley & Wraith models.
| Identifier | ExFiles\Box 151\2\ scan0392 | |
| Date | 9th March 1939 | |
| 1292 Da. {Bernard Day - Chassis Design} from Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} c. Hy {Tom Haldenby - Plant Engineer} /MS. c. Da {Bernard Day - Chassis Design} /JD. {J. Draper - Frames} c. Roy {Mr H. Royce - Buyer} /Lee. c. Rm {William Robotham - Chief Engineer} /Clm. {D. D. Clapham} Rm {William Robotham - Chief Engineer} /AFM {Anthony F. Martindale} 1/R.9.3.39. BENTLEY 5, 50 & WRAITH 80. In reply to Da. {Bernard Day - Chassis Design} 7/G.6.3.39., the oil in the damper can be divided into two parts, i.e., the working oil and the oil available for replenishment. If the total oil capacity is increased 5% the reserve oil is increased by a much higher percentage. The glands on the damper are rather better than on the standard R.R. rear damper, judging by results in France, and if the dampers had not been dismantled so often would still be effective @ 40,000 miles. A customer's car would not be interfered with so much. As regards the heating question, we did measure the temperatures reached; this was 45°C in the hottest spot. Our previous standard was 80°C in the reservoir. Here again an improvement has been effected over B.II. We called in Da {Bernard Day - Chassis Design} /DB. {Donald Bastow - Suspensions} to witness the test in case of scepticism. We asked for this small modification at a time when a necessary change had to be made to the damper casing; otherwise we would not have done so. Attempts to stop this going through must be considered obstructionism. Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} | ||