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 performance test results for a 49-GB car, recording water and air temperatures at various speeds.
| Identifier | ExFiles\Box 77\4\ scan0139 | |
| Date | 29th December 1919 guessed | |
| R.{Sir Henry Royce} R.{Sir Henry Royce} 235A (100 T) (S. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 643, 19-2-20) G 2618 X.3727 28/29/30.12.19. 49-GB. CAR. X.3456. RADIATOR TESTS. X.3727. (1) From Ticknall. Towards Ticknall. From Ticknall. | Water temp. | air. temp. | M.P.H. | Water temp. | air. temp. | M.P.H. | Water temp. | air. temp. | M.P.H. | |-------------|------------|----------|-------------|------------|----------|-------------|------------|----------| | 64½°C | 35°F | standing | 62°C | 35°F | standing | 63½°C | 34½°F | standing | | 65½ " | " | 30 | 63½" | " | 30 | 64 " | " | 30 | | 64 " | " | " | " | " | " | 63½ " | " | " | | 62 " | " | " | 65 " | 34½" | " | 61½ " | " | " | | 60 " | " | " | 64½" | " | " | 59½ " | " | " | (2) Radiator tests taken on 3 mile stretch Radiator as above. ¼ mile readings. One London Road. Towards Shardlow. Level Road. From Derby. To Derby. | Water temp. | air. temp. | M.P.H. | Water temp. | air. temp. | M.P.H. | |-------------|------------|--------|-------------|------------|--------| | 62½°C | 35½°F | 30 | 62°C | 32½°C | 30 | | 61½ " | " | " | 62 " | " | " | | 61½ " | " | " | 62½" | " | " | | 61½ " | " | " | 62½" | " | " | | 61 " | " | " | " | " | " | | " | 35 " | " | 62½" | 35 " | " | (3) Exptl: Radiator. Tests taken as No.2. - 1 mile readings From Derby. To Derby. | Water temp. | air. temp. | M.P.H. | Water temp. | air. temp. | M.P.H. | |-------------|------------|--------|-------------|------------|--------| | 60° C | 38°F | 30 | 59½°C | 38°F | 30. | | 60 " | " | " | 60½°C | " | " | | 60 " | " | " | 60½ " | " | " | | 59½ " | " | " | 61 " | " | " | Contd. | ||