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).
Temperature tests conducted to evaluate a filter position on the 25/30 model.
| Identifier | ExFiles\Box 135\2\ scan0166 | |
| Date | 31th May 1937 | |
| To E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} c. to GWH.{George W. Hancock - Head Chateauroux} 1138 Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}4/JH.31.5.37. Position of the Filter on 25/30. We have taken a series of temperatures with two thermometers one low down on the dash and the other at the front end of the engine where the filter was fitted on G.W.H's. instructions. With the car travelling. Dash position 37°C. 42 43 42 42 43 --- 249 Forward position air 10°C. 47°C. 52 51 47 50 53. --- 300 Average 41.5°C. 50°C. The temperature in the forward position is on the average 8.5°C hotter than the dash position. With the engine idling and temperature taken every 5 mins. Time minutes Dash Forward. 5 41 42 10 43 57 15 45 58 47 62 After 15 mins. forward position was 15°C higher. With the car standing engine switched off. taken every 5 mins. Dash Front Difference. °C °C 47 62 15°C. 45 55 10 43 50 7 42 48 6 From these results we cannot recommend this position. Rm{William Robotham - Chief Engineer}/J.B.Dixon. | ||