. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ing. Indicator cards taken show a reduction of backpressure by use of this type of nozzle as compared to thestandard one they had formerly used. Other companies are adopting grates with as high as55% air openings and claim by doing so they are able toincrease the size of their nozzle tips and get a better M t P 141 3 M E P ]](, SI H P 474 1 I H P 44fc 5 e chest pressure, lb - I79rse lever notches - 8 Typical Indicator Cards—Standard and Double Ported NozzleStandard Card Back Pressure Card in
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ing. Indicator cards taken show a reduction of backpressure by use of this type of nozzle as compared to thestandard one they had formerly used. Other companies are adopting grates with as high as55% air openings and claim by doing so they are able toincrease the size of their nozzle tips and get a better M t P 141 3 M E P ]](, SI H P 474 1 I H P 44fc 5 e chest pressure, lb - I79rse lever notches - 8 Typical Indicator Cards—Standard and Double Ported NozzleStandard Card Back Pressure Card in his paper at the 1920 convention, in which he statedthat after returning from this convention they took oneof their standard passenger engines, applied a back pres-sure gauge, also a U-shaped water vacuum gauge con-nected to the , with a view of showing theactual results obtained under similar conditions in actualservice from nozzles of dififerent sizes at the same speedwith the same throttle openings and full boiler pressure. Drawbar Horse Powe Standard NozzlePbesslb ,1748 200, M E P Ulve chest pressure, lb. - 175Reysrj. |e,er notches - J n t f 94 O M E P 92 I I HP 574 3 IMP 53tO •-» le«r notches Typical Indicator Cards—Standard and Double Ported NozzleStandard Card Back Pressure Card Tests with a standard nozzle of S/i in. diameter with ay»ths round bridge inserted just Ijelow the opening ofthe nozzle at a speed of sixty-four miles an hour showeda Syi in. vacuum with twelve pounds back pressure. Thendififerent sizes of nozzles were tried and it was finallyfound that a nozzle of 6% in. diameter developed a 6 with six pounds back pressure, or increased thevacuum from 5y2 in. to 6 in. and decreased the backpressure 50%, which greatly increased the efficiency ofthe locomotive and reduced the fuel consumption., We ctober, 1925 RAILWAY AND LOCOMOTI\E EXGIiNEERING 2S9 were not given fignres as to just what was the amountof decrease in fuel consum
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
