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 comparing the top water temperature of three different car models during a hill climb test, with radiator schematics.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan251 | |
| Date | 27th May 1929 | |
| TEST CAT AND FIDDLE HILL NO BONNET VENTILATION AIR TEMP 15°C EACH CAR CARRIES 3 PASS AND 5 CWT BALLAST ① S.S. CAR 22 EX WT. EMPTY 48.3 CWT ② PHANTOM CAR 14 EX WT. EMPTY 49.75 CWTS ③ OLD PHANTOM CAR 18 Y.C. WT. EMPTY 52.25 CWTS TOP WATER TEMP °C CLIMB MILES. F.2.B. PHANTOM 4.25" 24.25 FRONT AREA 500 ☐" VOLUME 2500 CU.INS. 24.25 14 EX. PHANTOM 4.8" 23.2 FRONT AREA 568 ☐" VOLUME 2720 CU.INS. 24.5" S.S. SMALL TUBE 4.00 26.25 FRONT AREA 625 ☐" VOLUME 2500 CU.INS 23 3/4 | ||