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).
Further tests and modifications to a radiator grille to improve cooling efficiency.
| Identifier | ExFiles\Box 87\1\ scan0120 | |
| Date | 14th September 1934 | |
| 1240? E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Std. c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Std.12/MA.14.9.34. FURTHER TESTS ON RADIATOR GRILLE TO LEC.3865. Since this grille was last tested (Hs{Lord Ernest Hives - Chair}/Std.13/KW. 14.9.34.) a further modification has been made to it in order to improve its effect on the cooling efficiency of the system - this consists of twisting each horizontal bar, through 90° in order to reduce the area of metal in the grille and so reduce its hydraulic resistance. As Brooklands track is closed at present, we were unable to test the grille exactly as before - however we approximated as near as possible to previous method by measuring our temperatures to boil at 40 M.P.H., full throttle on the Snake Pass near Glossop with and without the grille fitted, on a windless day. Results are shown on attached sketch. Summary. Reference to previous report - (Hs{Lord Ernest Hives - Chair}/Std.13/KW. 14.9.34) - and comparison of results obtained indicates that this modification has not appreciably affected the efficiency of the grille from a cooling standpoint, the fitting of the grille still resulting in a drop of 11% in air temperature to boil figure. Hs{Lord Ernest Hives - Chair}/Std. | ||