Diagnosing a petrol supply failure by monitoring under-bonnet and atmospheric temperatures.
| Identifier | ExFiles\Box 11\5\ 05-page027 | |
| Date | 13th April 1934 | |
| To Hs. {Lord Ernest Hives - Chair} From G.W.H. Hotel de France, Chateauroux(French test region), FRANCE. 13.4.34. 28-EX. We have still got failure of the petrol supply after stopping or going slowly through a village, although we have removed the pumps and fitted them under the scuttle. The cause is the filter which we did not move. We obtained the temperature at the rear of the dash where the filter is situated. Air Temp. 16°C., under bonnet 66°C. It makes no difference whether the bonnet shutters are closed or open. The air temperature under the bonnet with the above conditions is 60°C, as you enter a village and rises to 66°C. while travelling slowly, also if the car is stopped. We did not move the filter for the specific reason of finding out whether it had anything to do with the failure. A series of tests taken this morning are as follows:- readings taken every 25 miles. Atmospheric temp. ..... Air Temp. under bonnet against dashboard, exhaust side. 6°C ..... 55°C 5°C ..... 64°C 7°C ..... 58°C 8°C ..... 60°C 14°C ..... 58°C 14°C ..... 60°C 16°C ..... 60°C 17°C ..... 60°C 17°C ..... 61°C 18°C ..... 64°C 18°C ..... 61°C 18°C ..... 60°C We lagged the filter and as much pipe as we could this morning with asbestos. Result no sign of failure. The afternoon's temperature being higher has produced a failure, with an air temp. of 20°C, and a scuttle temp. of 67°C. G W Hancock. G.W.H. | ||
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).