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).
Continuation of a 20 HP car test report from Switzerland, detailing engine temperatures and performance data over time.
| Identifier | ExFiles\Box 24\4\ Scan172 | |
| Date | 30th May 1924 guessed | |
| 20 HP. TESTS IN SWITZERLAND - CONTD :- Conditions of test :- Same as previous test. Bonnet on exhaust side opened. Temp. was brought up to 73° but was lost in opening bonnet etc. TABLE DATA: | Air temp. | Temp. of Radiator | | Distance travelled kilomtrs. | Height climbed metres. | Ignition | Throttle. | Gear. | Condition of car. | Time mins. | Kilo per | | | Top. | Bottom. | | | | | | | | | |---|---|---|---|---|---|---|---|---|---|---| | 18°C | 64°C | 57.8°C | 8,223 | 600 | full advanced. | Full | 2nd. | Four passengers. Bonnet open on exhaust side. | 0 | | | | 63 | 57.8 " | | | " | " | " | " | 1 | | | 16.5 | 64.5 " | 58.9 " | | 620 | " | " | " | " | 2 | | | 16 | 66 " | 60 " | | | " | " | " | " | 3 | | | | 68 " | 62.2 " | | 690 | " | " | " | " | 4 | | | | 69 " | 63.3 " | | | " | " | " | " | 5 | | | 15.5 | 71 " | 65 " | | 760 | " | " | " | " | 6 | | | | 71.5 " | 65.6 " | | | " | " | " | " | 7 | | | 15 | 71 " | 65.6 " | | 820 | " | " | " | " | 8 | | | | 72 " | 66.7 " | | | " | " | " | " | 9 | | | 15 | 72.5 " | 66.7 " | | 880 | " | " | " | " | 10 | | | | 73 " | 67.2 " | | | " | " | " | " | 11 | | | 15 | 74.5 " | 66.7 " | | 940 | " | " | " | " | 12 | | | | 73 " | 65.6 " | | | " | " | " | " | 13 | | | 14.5 | 72.5 " | 65.6 " | | 1000 | " | " | " | Started to rain | 14 | | | | 72.5 " | 66.1 " | | | " | " | " | continued. | 15 | | | 14 | 74 " | 66.7 " | | 1080 | " | " | " | " | 16 | | | | 73 " | 66.7 " | | | " | " | " | " | 17 | | | | 74 " | 66.7 " | | 1190 | " | " | " | " | 18 | | | 12.5 | 72 " | 65.6 " | | | " | " | " | " | 19 | | | | 72 " | 65.6 " | 8,234 | 1220 | " | " | " | " | 19.20 | | | ||