. Railway mechanical engineer . ated or is open. For example. Fig. 2 showstwo cars of similar size and construction, one of which wasprovided with a floor rack and an insulated bulkhead, theother as commonly used. Both were loaded with eggs. Thecar with the insulated bulkhead and the floor rack reducedthe average temperature of the load 17 deg. F. in 64 load in the ordinary car showed a reduction of F. during the same period. The average temperatureof the car with the insulated bulkhead and the floor racks ..mtt. lVlr> RAILWAY MECHANICAL ENGINEER - deg. F. lower than t
. Railway mechanical engineer . ated or is open. For example. Fig. 2 showstwo cars of similar size and construction, one of which wasprovided with a floor rack and an insulated bulkhead, theother as commonly used. Both were loaded with eggs. Thecar with the insulated bulkhead and the floor rack reducedthe average temperature of the load 17 deg. F. in 64 load in the ordinary car showed a reduction of F. during the same period. The average temperatureof the car with the insulated bulkhead and the floor racks ..mtt. lVlr> RAILWAY MECHANICAL ENGINEER - deg. F. lower than the ordinary car. That it iadvisable to cease improvements with the floor raik and theinsulated bulkhead i> indicated by experiments which showthat the quick cooling by ice and ?alt safely performed withthe basket insulated bulkhead and floor rack is not posswithout it. The pocketed cold air at the box bunker, whichi- always observed with bunkers of the box type, causes frost-ing nf the ga -l the bulkhead even when The failure of refrigerator cars to maintain even tempera-tures throughout the load has been a serious menace to ex-tremely perishable products. In order to produce tempera-tures at the top of the load between the doors—commonly thewarmest place in the car—low- enough to carry dressed poul-try safely, it has been necessary- to freeze the birds at thebunker. While freezing in transit does not injure the foodvalue of dressed poultry, it does lower its money value atcertain seasons or in some markets. Better air circulationtends to equalize temperatures, as shown in Fig. 3. In thecar with the box bunkers and open bulkhead (car B). wherethe load was placed on floor strips, the package at the bunkeren the floor froze solidly (23 deg. F.) during a four-day haul,although the package on the top of the 4 ft. load was F. A similar car (car A), except that it had a basketbunker with an insulated bulkhead and a floor rack, main- tained an average tempe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
