. American engineer and railroad journal . in this general the design follows very closely what might be calledstandard practice, if it be conceded that the Mallets have reacheda standard. The boiler is equipped with a radial stay firebox,which has 404 flexible staybolts grouped in the outside rows onthe sides and back, and in the upper corners of the sides. Flex-ible stays are also used in the triangular areas in either side of diameter. Those on the high pressure cylinders have inside ad-mission, while the low pressure have outside admission. A fiatplate type of relief valve is a
. American engineer and railroad journal . in this general the design follows very closely what might be calledstandard practice, if it be conceded that the Mallets have reacheda standard. The boiler is equipped with a radial stay firebox,which has 404 flexible staybolts grouped in the outside rows onthe sides and back, and in the upper corners of the sides. Flex-ible stays are also used in the triangular areas in either side of diameter. Those on the high pressure cylinders have inside ad-mission, while the low pressure have outside admission. A fiatplate type of relief valve is applied to the top of the steam chestin a manner customarily used by these builders. The valve gearsare controlled by a Ragonett power reversing gear, the reachrod between the high and low pressure reversing shaft beingcarried along the center line of the locomotive, with a universaljoint at the high pressure cylinders. The frames are of cast steel 5 in. in width and the arrange-ment and construction is the same as customarily used by the. BOILER OF THE PASSENGER LOCOMOTIVES. the throat sheet. The dome is placed on the center of the threerings of the barrel, and is directly above the high pressure cyl-inders ; 448 2j4 in. flues, 21 ft. in length in an 86 in. diametershell permits a very liberal width of bridges and satisfactorygeneral arrangement. This gives a heating surface in the tubesof 5,519 sq. ft., the total heating surface being 5,752 sq. ft. sq. ft. per square foot of grate area. The boiler is supported on the rear frames by means of a plateat the back end of the mud ring and sliding bearings on thefront in the usual manner. It is also supported at the highpressure cylinders, the distance from the center of the cylin-ders to the face of the throat sheet being 10 ft. 4^ is further a plate support at the high pressure guide yoke,which is about 28 in. ahead of the throat sheet. On the fiontframes there is but one actual support, which is located midwaybetwe
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
