. Locomotive engineering : a practical journal of railway motive power and rolling stock . cribed, there ismuch possible yet in reserve, viz.: a largermain reservoir capacity, which is needed;two pumps on hill engines, a higher trainpipe pressure than 80 pounds, lower speed,the water brake and, by placing the engineahead, the use of sand. This train was much easier to controlthan many met with on 116-foot gradesand where the cars do not exceed 30-toncapacity. The reason lies in all cars beingfitted with air brakes in good order, prop-erly leveraged and having is-pound pres-sure retaining valve
. Locomotive engineering : a practical journal of railway motive power and rolling stock . cribed, there ismuch possible yet in reserve, viz.: a largermain reservoir capacity, which is needed;two pumps on hill engines, a higher trainpipe pressure than 80 pounds, lower speed,the water brake and, by placing the engineahead, the use of sand. This train was much easier to controlthan many met with on 116-foot gradesand where the cars do not exceed 30-toncapacity. The reason lies in all cars beingfitted with air brakes in good order, prop-erly leveraged and having is-pound pres-sure retaining valves. Could any advocate of a heavier retain-ing valve have seen the difficulty experi-enced in starting the train following itsseparation, he would have been convincedof the adequacy of the standard valvewhen maintained. F. B. Farmer. Sf. Paul, Minn. Improved Oil Cup for Air Cylinder ofAir Pumps, Editor: I am sending you a drawing of two cyl-inder oil cups which may interest someLocomotive Engineering readers. Fig. I shows an ordinary oil cup with14-inch ball in the lower end, which acts. Lociintttive EnnifieerinffCHART SHOWING BRAKE TEST OF LARGE CAPACITY CARS ON HEAVY MOUNTAIN GRADES. tory had the initial reductions with appli-cations 4 to 7 been a little heavier and iftwo or three more applications had beenmade. This would have reduced the totalof each reduction and resulted in a moreuniform speed. The light initial reduc-tion resulted in a speed much above theaverage for the trip, the object being toincrease the distance run before train pipeleakage would slow down the train. With as a check valve. Fig. 2 shows a drawingof a common oil cup without the cut-outplug, and which also has a hinged lid tokeep the dirt out. These cups are madeby simply drilling a 5-16 inch hole in thelower end and inserting a 14-inch ball andalso a stop-ring to prevent the ball fromdropping out. The object of this cup is to allow oil tobe put in the air cylinder without blowing 492 LOCOMOTIVE ENGINEE
Size: 1803px × 1385px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
