BN-7915 



Figure 9. --Test shipment in which rear stacks of boxes 

 are loaded so tightly and solidly across the trailer 

 from sidewall to sidewall as to completely cut off 

 air circulation along the sidewalls. 



ceiling. These strips kept the loads from fitting too tightly against the 

 walls and allowed additional air circulation space. Fruit temperatures were 

 taken in various parts of the Test 35 load at destination only. They are 

 shown in table 3. 



The figures in parentheses in table 3 are the average temperature readings 

 taken in the corner of boxes located tight against the plywood sidewall of the 

 trailer. The average is taken from the readings for 3 or 4 sample boxes in 

 the top, middle, or bottom layers of each test load. In each case, an apple 

 in the corner of the box next to the trailer wall was checked because in that 

 position the apple was subject to more heat infiltration than the apples in 

 the interior of the box. In some instances the temperature of the corner apple 

 was as much as 12 degrees higher than that of apples in the interior of the 

 same box. * 



However, in the one experimental test shipment (35) with wall strips on 

 the trailer walls, the corresponding fruit temperatures varied only a degree 

 or two within the same containers. This emphasizes the need for wall strips 

 (fig. 11) on the bunker bulkhead and sidewalls of the trailers to help provide 

 better circulation of air for refrigeration. Stripping the rear doors of the 

 trailers would be of additional benefit in this respect especially where the 

 end of the load comes close to the doors. 



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