. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . or provide suitable baffles to deflect the air. If this precaution is not taken with ■:> using relatively high velocity a end of main duct will take more than their share of the air When making a tap from the main own in Fig. 4-A and i Fig 4 1: -I Rl a l\ ..i in OW1 RINTAKE in I r \ i,i \ i rs, pressure and a certain loss. Reducingthe area to /2 square foot, the air willhave to travel at twice the speed to de-liver the same amount of air. The re-sistance of the duct will be approximatelytw
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . or provide suitable baffles to deflect the air. If this precaution is not taken with ■:> using relatively high velocity a end of main duct will take more than their share of the air When making a tap from the main own in Fig. 4-A and i Fig 4 1: -I Rl a l\ ..i in OW1 RINTAKE in I r \ i,i \ i rs, pressure and a certain loss. Reducingthe area to /2 square foot, the air willhave to travel at twice the speed to de-liver the same amount of air. The re-sistance of the duct will be approximatelytwice as great, requirng an increaseni pressure to force the same amount ofair through the duct. As the Spihence the pressure, of a railway blowerunit is usually fixed, there will be a re-duction in the total amount of air de-livered to the motors. It is usually a. FIG 3. METHOD OF SECRETINSBLOWER INTAKE, wo,,J plan to keep the area of the ductthe same as the openings in the blower,or slightly larger where space arranging the duct opening forconnecting the canvas bellows, care shouldbe taken to have the opening of the ductdirectly over the motor opening, withthe truck in the normal position, so as togive as little restriction to the passage ofair as possible. In cases where the dis-tance between the opening in the ductand the motor is short, a canvas tube may
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
