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).
Radiator test results showing water, atmospheric, and footboard temperatures under various conditions.
| Identifier | ExFiles\Box 77\4\ scan0148 | |
| Date | 13th May 1920 | |
| X.3424 49-GB CAR. 13.5.20 C F & EFC. X.3456 RADIATOR TESTS. 10 mm. Tubes. 3 1/2 mile level stretch London Rd. 1/2 stretch readings. (1) From Derby. Water Temp. | atmos. temp. | Foot Boards. | M.P.H. 62° | 15 1/2° | 24°C | 30 63 1/2° | " | 25 1/2° | " 65 1/2° | " | " | " 67° | " | " | " 70° | " | 26° | " 70 1/2° | " | " | " 72° | " | " | " To Derby. Water temp. | atmos. temp. | Foot Boards. | M.P.H. 62° | 14° | 27° | 30 64° | " | " | " 65° | " | 26 1/2° | " 69° | 15° | 27° | " 71° | " | " | " 71 1/2° | " | " | " 72° | 16° | " | " (2) Ticknall Hill. 10 mm. tubes. 13.5.20. UP. 73° | 16° | 26° | 30 74° | " | 28° | " 75° | " | " | " 79° | " | " | " 78° | " | " | " 78° | 15° | " | " DOWN. 73° | 14° | 27° | 30 74° | " | " | " - | " | 28° | " 73° | " | " | " 72 1/2° | " | 28 1/2° | " - | 16° | 29° | " (3) 8 mm Tubes. 13.5.20. UP. 62° | 20° | 26° | 30 65° | " | 26 1/2° | " 69° | " | 27 1/2° | " DOWN. 62° | 17° | 24° | 30 65° | " | 25° | " 66 1/2° | " | 25 1/2° | " Contd. | ||