Log of under bonnet and water temperatures for two different engine models over a 15-minute period.
| Identifier | ExFiles\Box 150\2\ scan0378 | |
| Date | 13th September 1941 guessed | |
| AIR TEMPERATURE 16°C. UNDER BONNET TEMP: WATER TEMP: Time. 9-B-V. {VIENNA} B.60 LS. 9-B-V. {VIENNA} B.60 LS. Start 21°C 18 - 35°C 30 Secs 21 18 - 46 1 Min 21 18 - 50 1½ " 21 19 - 65 2 " 21 20 - 70 2½ " 21 22 - 73 3 " 21 25 - 75 3½ " 23 30 - 75 4 " 23 35 50 75 4½ " 24 35 54 76 5 " 26 36 60 76 5½ " 26 38 64 76 6 " 27 38 65 76 6½ " 28 38 67 76 7 " 29 38 68 77 7½ " 39 39 70 77 8 " 30 40 70 77 8½ " 30 40 72 77 9 " 30 40 72 77 9½ " 30 40 73 77 10 " 30 40 74 77 10½ " 31 40 74 77 11 " 31 40 74 77 11½ " 32 40 75 77 12 " 32 40 76 77 12½ " 32 40 76 77 13 " 32 40 76 77 13½ " 32 40 76 77 14 " 33 40 76 77 14½ " 33 40 76 77 15 " 33 40 76 77 | ||
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).