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).
Log sheet recording temperature and performance data during vehicle test laps under various conditions.
| Identifier | ExFiles\Box 24\5\ Scan226 | |
| Date | 4th June 1930 guessed | |
| MEAN LAP TIME. AIR TEMP. TOP WATER TEMP. BOTTOM WATER TEMP. OIL TEMP. SCUTTLE TEMP. GEAR-BOX TEMP. OIL PRESSURE. M.P.H. CONDITION (1) A.{Mr Adams} C.O. OPEN. 2ND. TEST RUN. 78.18 | 18 | 86°C. | 169°F.{Mr Friese} | 100°C. | 36° | 62° | Lbs/sq.in. 25 2nd.lap 78.06 | 18 | 91.5° | 178° | 106° | 37° | 62.5 | 23 4th.lap 77.81 | 18 | 93° | 179° | 110° | 38° | 65° | 22 6th.lap 77.81 | 18 | 86° | 178° | 110° | 39° | 65° | 22 8th.lap TOTAL OF EIGHT LAPS. CONDITION (1) B. C.O. CLOSED. 1ST. TEST RUN. 73.78 | 17.6 | 86° | 174° | 94° | 33° | 50° | 25 2nd.lap 74.33 | 17.6 | 87° | 174° | 100° | 34.5° | 53° | 26 4th.lap 74.55 | 17.6 | 88.5° | 176° | 103° | 36° | 57.5° | 26 6th.lap 74.55 | 17.6 | 89° | 174° | 105° | 37° | 53° | 26 8th.lap 74.55 | 17.6 | 90° | 176° 80°C | 106° | 37.5° | 60° | 26 9th.lap TOTAL OF NINE LAPS. 7 mins. rest between B and C. CONDITION (1) C. 74.44 | 23° | 90° | 174° | 92° | 38° | 62° | 30 ½gall oil added. 74.89 | 23° | 96° | 182° | 102° 84°C | 38° | 63° | 27 Running conditions much warmer at C. test. Weather changed. Handwritten section: 160 | 71°C 165 | 73.75°C 170 | 76.5° 175 | 79.25° 180° | 82°C With C.O. open front wings off " Closed " " on 80 3/5 2.4 K-S 2.10/76.6 | ||