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).
Letter from Harrison Radiator Corporation detailing oil cooler performance data with and without a cooler.
| Identifier | ExFiles\Box 173\2\ img175 | |
| Date | 13th February 1934 | |
| HARRISON RADIATOR CORPORATION LOCKPORT, NEW YORK February 13, 1934 Mr. W. A.{Mr Adams} Robotham Detroit Athletic Club Detroit, Michigan Dear Mr. Robotham: Appreciate your letters of February 4th and 12th. Have deferred answering yours of the 4th until I had an opportunity to corral the information you request concerning oil coolers. The machinery, information etc., was discussed with Mr. Whitney and it is my understanding that it has been sent on to you. In connection with the oil cooler, etc., on the larger size passenger car oil cooler installed, the oil temperature drop is between 15 and 20°F through the cooler, at an oil flow through the cooler of 5 gals./min. Under these conditions approximately 225 to 250 B.T.U./Min. is removed from the oil and the sump temperature remains about 40°F above the water temperature of the radiator. An average condition at 70 M.P.H., full load with an air temperature of 100°F is as follows: With Cooler Without Cooler Rad. Top Tank Temperature 200 202 Rad. Bottom Tank Temp.(Passed thru Cooler) 190 192 Sump Oil Temp. to Pump to Cooler 255 296 Oil from Cooler to Bearings 218 295 Trust this information will answer your question. If not please write in for further details. With kindest regards, Yours very truly HARRISON RADIATOR CORPORATION L. P. Saunders L. P. Saunders Director of Engineering LPS:C HEAT TRANSFER PRODUCTS RADIATORS - SHUTTERS - OIL TEMPERATURE REGULATORS - AVIATION - AUTOMOTIVE - INDUSTRIAL - CAR HEATERS - THERMOSTATS - CONDENSERS | ||