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).
Test record card detailing engine and cabin temperatures under different running conditions and routes.
| Identifier | ExFiles\Box 78\3\ scan0040 | |
| Date | 2nd February 1909 | |
| R.R. 148 (6 H) (C. 850, 2.2.09) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6654. Temperature Test. 3500 .X496 | Running Conditions | Heat of water in Radiator | Heat of Floorboards | Consumption in miles per tank | atmos. temp. | Run between | Remarks | |---|---|---|---|---|---|---| | Standard car | 60° | 29.5° | 13 1/2 | 2° C | Derby & Ashbourne. | | | Gauze in front of radiator | 70° | 33° | 16 | 0° C | Ashbourne & Leek. | | | Gauze fixed & no fan. | 92.5° | 60° | 18 | 0° C | Leek & Macclesfield | This test is unfair as 50% was downhill. | | No fan | 84° | - | - | 3° C | Macclesfield & Marple | | | Standard car | 69.5° | 20° | 15 1/2 | 5° C | Marple and Adlington Track. | 4 up | | No fan | 80° | 46° | 16 1/2 | 7° C | " | 5 up Heavy roads | | Gauze fixed & no fan with hot air pipes | 96° | 71° | 18 | 10° C | " | 5 up | | no fan light hot air pipes fixed | 66.5 | - | 15 1/2 | 10° C | Marple to Macclesfield | Fast driving | | Hot air pipes fixed only | 65.5 | - | 14 1/2 | 10° C | Macclesfield, Leek & Ashbourne | Extra oil disconnected. Knock slightly more pronounced. | | ||