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).
Line graph charting top and bottom water temperatures from a test conducted at Brooklands under various conditions.
| Identifier | ExFiles\Box 29\3\ Scan232 | |
| Date | 2nd July 1930 | |
| GRAPH III TEMPERATURE C° 90 85 80 75 70 65 60 TOP WATER TEMP BOTTOM WATER TEMP (1) FULL WEAK NO FAN (2) AS 1 BUT MIXTURE NORMAL NO FAN. (3) AS 2 BUT FAN SPRING LOADED (4) AS 3 BUT FAN BELT CHOC A BLOC. (5) AS 4 BUT FAN 1" NEARER RAD (6) AS 5 BUT DOUBLE RAD OUTLET (7) AS 6 BUT ALL BONNET SHUTTERS OPEN CONDITIONS FOR TEST (1) ALL BONNET SHUTTERS CLOSED STANDARD UNDERSHIELD 62.5 M.P.H. ATS TEMP 20°C 19 EX CAR 11 x 41 AXLE BROOKLANDS TEST 2/7/30 | ||