. Automotive industries . involved in thedevelopment of a successfulair-cooled engine. Samuel W. Rushmore,well known to the automo-tive industry as a formermanufacturer of search-lights (headlights) and ofan electric starting andlighting system, has recentlydeveloped a cooling systemwhich is in a way inter-mediary between the aircooling and the ordinarywater cooling is used as the coolingmedium, but the jacket out-let temperature is constantlymaintained above the boiling point of water. There isordinarily little or no water in the radiator above thebottom tank. The radiator core
. Automotive industries . involved in thedevelopment of a successfulair-cooled engine. Samuel W. Rushmore,well known to the automo-tive industry as a formermanufacturer of search-lights (headlights) and ofan electric starting andlighting system, has recentlydeveloped a cooling systemwhich is in a way inter-mediary between the aircooling and the ordinarywater cooling is used as the coolingmedium, but the jacket out-let temperature is constantlymaintained above the boiling point of water. There isordinarily little or no water in the radiator above thebottom tank. The radiator core is filled with steam to acertain height depending upon the relation between heatabsorption in the cylinder jackets and heat dispersal perunit of core surface. It is obvious that the radiator be-comes much more effective with a cooling medium at 220to 240 deg. on the inside of the core than with water atfrom 100 to 200 deg., especially at high atmospheric tem-peratures. The great practical advantage of the new system, and. which should ensure for it a wide field of application, isits simplicity. Imagine an ordinary water cooling systemwith pump circulation and having a thermostat in the topconnection between jacket and radiator. The thermostatis removed and the connection to the top tank of theradiator eliminated. The outlet from the jacket is con-nected to the bottom tank of the radiator, the radiatoroverflow pipe is providedwith a blow-off valve set toabout 5 lb. per sq. in. andthe centrifugal pump is re-placed by some type of posi-tive pump. (Mr. Rushmorehas so far used gear pumps.)The bottom tank of theradiator is preferably en-larged in size. This com-pletes the system. Even though the thermo-stat is removed, the same-advantages are obtained aswith the ordinary systemwith thermostat, becausewhen starting a cold engine-there is no circulation of thecooling fluid through theradiator, and the enginetherefore quickly approachesits normal working tem-perature. In fact, the cool-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
