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 charting oil, water, and air temperatures against average speed over a multi-day test run.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page298 | |
| Date | 9th December 1932 | |
| 2. PER. II (4) °C. OIL. WATER + AIR TEMPS. EVERY 25 MILES. 6 OIL WATER AIR SPEED M.P.H 120 110 100 90 80 70 60 15 10 5 3.12.32 7.12.32 8.12.32 9.12.32 <-- 45.4 --*-- 46.9 --*-- 50.0 --*-- 50.8 --*-- 52.3 --*-- 52.6 --*-- 49.2 --> | ||