. Railway and Locomotive Engineering. period forty changes of posi-tion of nozzle were measured, two de-signs of nozzle were also tested, anozzle of greatest discharge and a noz-zle of greatest velocity. Briefly, theresult, checked by a sensitive mano-meter, was found to be that nozzleshould be placed 4 ins. from the end ofa 2/i-in. air tube. Fig. 8 shows the best February, 1912. RAILWAY AND LOCOMOTIVE ENGINEERING. 49 position for the nozzle. The one shownhere is a nozzle of greatest velocity,which gave the best results. A power-ful blower is a useful auxiliary in theprevention of smoke. When
. Railway and Locomotive Engineering. period forty changes of posi-tion of nozzle were measured, two de-signs of nozzle were also tested, anozzle of greatest discharge and a noz-zle of greatest velocity. Briefly, theresult, checked by a sensitive mano-meter, was found to be that nozzleshould be placed 4 ins. from the end ofa 2/i-in. air tube. Fig. 8 shows the best February, 1912. RAILWAY AND LOCOMOTIVE ENGINEERING. 49 position for the nozzle. The one shownhere is a nozzle of greatest velocity,which gave the best results. A power-ful blower is a useful auxiliary in theprevention of smoke. When an engineis shut off and before the air jets getto work, the firebox flues and front endare full of smoke that cannot be, fortlie instant, controlled by the air such cases the blower makes up theilclicicncy. The blower pipe should not be lessthan 1J4 nis. in diameter, with a quick-opening, independent valve, so ar-langcd that it can be used by eitherengineer or fireman, and an automaticvalve which turns steam into the blower. pipe and air jet pipes when the throttleIS shut off. The independent valve isfor use in case the automatic valve getsout of order. Nos. 5 and 6 show blow-ers located in the smokestack 6 was designed in 1861 by , superintendent of the RogersLocomotive Works. No. 5, a copy ofNo. 6, was in use for years on the Wa-bash R. R. Blowers have also beenmade by using a circular pipe piercedwith small holes located just below thesmokestack base. This arrangementcan be applied without making a newstack base. A very good method, if not the best, is to arrange the bloweropenings on an annular ring surround-ing the exhaust nozzle. While engine is running, the firebrickarch takes care of the smoke. When astop is made an automatic valve oper-ated by the throttle lever is openedand steam is turned in blower pipe andair jet pipes. Smoke is thus controlledunder all conditions. About fifty-threeyears ago, D. K. Clark stated that thedesirable apparatus
Size: 959px × 2604px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, bookyear19
