. Railway master mechanic [microform] . In the diagram, line A shows the velocity of eduction for thevarious blasts, regulated to correspond with different train speedsin miles per hour. In making these tests the ventilator wassecured to the side of a box in a similar manner to its locationon the side deck of a passenger car, as shown in the sketch rep-resenting the method of placing these ventilators on railroadcars. An anemometer was placed immediately inside of theopening and the velocity of eduction was measured by this ane-mometer. The dots along the line A show the actual results ofthe v
. Railway master mechanic [microform] . In the diagram, line A shows the velocity of eduction for thevarious blasts, regulated to correspond with different train speedsin miles per hour. In making these tests the ventilator wassecured to the side of a box in a similar manner to its locationon the side deck of a passenger car, as shown in the sketch rep-resenting the method of placing these ventilators on railroadcars. An anemometer was placed immediately inside of theopening and the velocity of eduction was measured by this ane-mometer. The dots along the line A show the actual results ofthe various tests, and the line drawn gives about a mean positionfor this group of points. In a general way, it shows that at aspeed of 49 miles per hour, the velocity of eduction was 1,530feet, and at 30 miles per hour the air was pulled out of thebox through the ventilator at a speed of 930 ft. a minute. Asline A is straight, the velocity of suction, by means of ventilator,is evidently directly proportional to the velocities of the Ventilator Applied to Passenger Car. In order to obtain some comparison between the Cyclone andthose that were tested in 1894, by the M. C. B. Committee, oneof the type of ventilators giving the best results in that test wassubmitted to the same treatment as the Cyclone ventilator. Theresults are shown by the line B, the open circles giving the pointstaken from the actual tests. From these two diagrams it is evi-dent that the velocity of eduction through the ventilator, withwhich comparison was made, was not quite two-thirds that ofthe Cyclone ventilator, and while the Cyclone ventilator was5 in. in diameter at the neck connecting to the deck of the car,the ventilator against which it was tested was only 4 in. indiameter, and in determining the volume of eduction we haveconsidered that if a 5 in. size had been available, the velociti-swould have been the same and the quantity of air removed would N k /SOO r /400 1300 //OO
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
