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).
Car cooling tests without a fan and an assessment of rear brakes with steel shoes.
| Identifier | ExFiles\Box 5a\3\ 03-page273 | |
| Date | 7th June 1933 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} - 2 - COOLING. We again ran the car without the fan working whilst the air temperature is high to obtain more data as we are of the opinion that the results will be of interest to you. It is very noticeable that there is no practical difference in the water temperature with or without the fan, but there is a distinct rise in the oil temperature. The result being that instead of the oil temperature following just under the water temperature, the water temperature followed just under the oil temperature. The chart enclosed gives you the position. The fitting of the standard 25 H.P. fan stopped the water boiling with the engine idling, but we must admit that the boom from the fan at 60 M.P.H. and upwards is rather distressing after the quietness of the smaller fan. We do not think it is necessary to go to this fan if you will lift the smaller fan near to the top of the radiator matrix, surely this would not cause much scrap or cost to produce a new fan bracket. BRAKES. REAR BRAKES WITH STEEL SHOES. The setting of the movement of the brake lever was reduced to .500. With this setting we have had no sign of brake seizure during the runs. Was it intended to use standard Ferodo linings? The brakes sent out were fitted with it whereas the brakes taken off were lined with AMB2 These we thought were better than the present brakes, but no actual braking tests were taken. [Signature] G.W.H. We have added to the chart this morning's run with the fan fitted. | ||