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 at Brooklands detailing insufficient radiator cooling, petrol starvation, and a seized cut-out valve.
| Identifier | ExFiles\Box 42\5\ Scan059 | |
| Date | 11th June 1930 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} From F.{Mr Friese} Dodd. X3895. Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}1/MJ.11.6.30. [Handwritten numbers in right margin] X788 X366 X7080 X3895 BROOKLANDS. 4.6.30. Temperature tests of top and bottom water temperature, oil temperature [handwritten: scuttle temp,,], and clutch pit temperature, were taken with air silencer and standard carburetters fitted. No difference was found in the temperatures by changing over from air silencer carburetter to standard. The cooling powers of the radiator were found to be insufficient. Water boiled after three laps at full throttle, approximately 10 miles running. With the ventilated bonnet (shutters at the rear end of bonnet only) the same conditions were reproduced, water boiled at the end of three laps. Maximum air temperature on the track was 25°C. Maximum oil temperature reached 110°C. Maximum scuttle temperature 39°C. Maximum temperature in clutch pit 65°C. During these tests we experienced starvation in the petrol supply. The non-return ball valve in the delivery line was inverted, but did not affect a cure. The porous pot filter was then replaced by the plate element, after having first replaced the ball valve in its correct position. No further trouble being experienced with starvation. The cut-out valve in the silencer seized up during these tests, temporarily, but came free after cooling down. | ||