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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
  
  


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