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).
Tests of various Bentley radiators, fans, and radiator grilles at Brooklands.
| Identifier | ExFiles\Box 87\1\ scan0085 | |
| Date | 14th September 1934 | |
| HS{Lord Ernest Hives - Chair}/Std.13/KW.14.9.34. Report on Tests carried out at Brooklands on Various Bentley Radiators, Fans & Radiator Grille. -------------------- The tests were carried out in the usual manner by noting water temperatures, air temperatures and bonnet temperatures at various speeds and throttle openings. The radiators compared were :- (1) A standard Marston Mark III matrix, 84 m.m. thick. (2) A Marston Mark III matrix, 70 m.m. thick. (3) A Marston Mark V matrix (same as Harrison Vee bonded type), 70 m.m. thick. (4) A Marston Mark V matrix, 58 m.m. thick. Comparisons were made between (a) shutters and a radiator grille (Lec.3865 modified to have alternate horizontal bars deleted) from the standpoint of reduction of cooling efficiency. The Grille was also tried with slats fitted on the ribs in order to attempt to improve its efficiency. (b) Shutter method of control of water temperature and thermostatically controlled bypass method from standpoint of bonnet air temperature. The rise of temperature at the air intake with rise of water temperature (the shutters being closed) was also noted at various speeds. Two fans - a standard Bentley and a standard 20/25 - were compared from the standpoint of drop in speed due to power absorbed in driving them. Results. These are shown on separate sheets in accordance with our usual practice. All water temperature shown are actual temperatures less atmospheric temperatures recorded during tests. | ||