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).
Graph plotting the air temperature to boil, comparing radiator performance with and without a grille fitted on a Bentley.
| Identifier | ExFiles\Box 87\1\ scan0121 | |
| Date | 13th November 1934 guessed | |
| TESTS ON BENTLEY RADIATOR GRILLE (LEC 3865) TESTS CARRIED OUT ON 'SNAKE' PASS NEAR GLOSSOP. AIR TEMP: TO BOIL - °C NO GRILLE FITTED GRILLE FITTED CONDITIONS OF TESTS 40 M.P.H. FULL THROTTLE NO FAN FITTED 40 M.P.H. FULL THROTTLE STD: FAN FITTED | ||