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 report on engine oil temperature at the bearings under various conditions.
Identifier | ExFiles\Box 179b\3\ img320 | |
Date | 8th February 1933 guessed | |
HS{Lord Ernest Hives - Chair} 858 CONDITION OF ENGINE OIL TEMP INLET TO THE BEARINGS THAT WILL BE REACHED AT 75 M.P.H. WITH AIR TEMP OF 30° C 1) PLAIN BOTTOM HALF. OIL PRESSURE 50 LBS/SQ" NONE TURBULENT OIL FLOW ACROSS BASE. 145°C 2) PLAIN BOTTOM HALF. OIL PRESSURE 20 LBS/SQ" TURBULENT FLOW. 135°C 3) RIBBED SUMP. OIL PRESSURE 20 LBS/SQ" TURBULENT FLOW. 128°C 4) RIBBED SUMP. OIL PRESSURE 20 LBS/SQ" TURBULENT FLOW. RADIATOR SHUTTERS FULLY OPEN * 118°C 5) FURTHER DROP THAT COULD BE OBTAINED BY HONEYCOMB WATER COOLER IN THE SYSTEM. 103°C WITH AN OIL PRESSURE OF 50 LBS/SQ" THE BEARINGS WILL NOT RUN IF THE INLET OIL TEMP IS KEPT BELOW 100°C. WITH 20 LBS/SQ" OIL PRESSURE, HOWEVER, IT IS PROBABLE THAT AN OIL INLET TO THE BEARINGS OF 85°C SHOULD NOT BE EXCEEDED. THEREFORE EVEN IN CONDITION ⑤ WE ARE 18° SHORT OF A SAFE TEMPERATURE. * THESE TESTS WERE TAKEN AT 0°C AND CORRECTED UP TO 30° C AIR. THE ARTIFICIAL POSITION THEREFORE AROSE THAT THE RADIATOR SHUTTERS WERE ALMOST CLOSED WHICH DEPRIVED THE TOP HALF OF ITS COOLING DRAUGHT AT 30°C THEY WOULD HAVE BEEN FULLY OPEN. A TEST WAS THEREFORE CARRIED OUT IN THIS CONDITION. | ||