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 results of radiator tests, showing under-bonnet air temperatures at different speeds with and without a grille.
| Identifier | ExFiles\Box 87\1\ scan0067 | |
| Date | 16th January 1934 | |
| RADIATOR TESTS AT BROOKLANDS TRACK - BONNET AIR TEMPS. RECORDED (CAR 1S.34) AIR TEMP UNDER BONNET °C GRILLE FITTED - 50 M.P.H. GRILLE FITTED - 60 M.P.H. NO GRILLE - 50 M.P.H. NO GRILLE - 60 M.P.H. AVG. TEMP. OUTSIDE CAR THIS DAY = 13.5 °C X-AXIS: A B C A B C A B C A B C BOTTOM LINE: A B & C THERMOMETER POSITIONS READINGS TAKEN 3/H/16.1.34 | ||