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 plotting oil, water, and air temperatures recorded every 25 miles during a test.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page214 | |
| Date | 10th February 1933 | |
| XH057 OIL, WATER & AIR TEMPS. EVERY 25 MILES Average Speed 47.47 mph 6-2-33. OIL 120 90 80 oil to bearings Water 90 15 10 air WATER 80 70 60 FROM SUMP. TO BEARINGS WATER Speed MPH < 250 MILES > AVERAGE SPEED 47.62 AIR 15 10 5 10-2-33. | ||