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).
Recommendations to reduce engine over-heating.
| Identifier | ExFiles\Box 24\4\ Scan303 | |
| Date | 25th November 1924 | |
| R.R. 453A (20H) (D.A. 652 20-3-24) J.E.S. EXPERIMENTAL REPORT. Expl. No. REF Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG25.11.24. RECOMMENDATIONS TO REDUCE OVER-HEATING. Increase matrix height. The increase of matrix height to 22½" should materially decrease the number of over-heating complaints. Though this only increases the critical radiator temperature by some 7ºC, over the 20½" matrix, the increase will be of considerable value as it will eliminate the numerous cases where the car just boils on one of two days in the year. Increased ventilation. We find that the largest shutters we can fit to the present bonnet are 8" X 14.5". These are probably larger than could be standardised, as they weaken the panels considerably. Their value at 30 m.p.h. is equal to putting 1½" on the matrix, which is not to be dispised. In conjunction with the large matrix they should practically eliminate high speed omplaints, as the value of ventilation at speed is marked. They are somewhat unsightly when open. Increased fan efficiency. Any improvements can be completely counteracted by a slack fan belt. So far investigations have not indicated a more satisfactory Fan than the present standard 6-bladed articel. It therefore remains to improve the drive by increasing the section and if possible, the quality of the belt. contd :- | ||