*9
reverse curves of 119 ft. radius hundreds of times eaC \ ^ T ot ^ er in
exclusively to operate a line which has more trains over 1 clagses of
the world. The dimensions and weight of the threethese engines are as follows : _ ^ ft g y 2 in.
Gauge of road, -
Weight of engines, with full supply of fuel and 32,760 and 35,14°-
ia’170, 21,410 and 2 3 r 79 °-. 118 and 42 m.' 10 in.
14 and 16 in.
Weight on driving-wheels,
Diameter of driving-wheels, -Diameter of cylinders, -
Stroke of pistons, - „ arivinp--
Distance from centre of truck to centre of extreme d
wheel, - - .
Distance from centre to centre of driving w ee s,
Length of grate, -
Width of grate, - - '
Outside diameter of smallest boiler-riNumber of tubes,-Diameter of tubes, -Length of tubes, -Square feet of grate surface,
Square feet of heating surface in fire-boxSquare feet of heating surface in tubes,
4-~1
-ring,
12 ft. 9 in.5 ft.42^4 in.34^ in.- 34 and 40 in.
100 and 128.1 >2 in.
- 78, 79 and 82 in.10.2 and 10.19.44.7 and 42.2.25 r - 8 , 3 2 6-5 and 339- 2 9-296-5, 373-7 and 386.53.
450 galls.
93 represents a larger size of a similar engine, which is one of fiveville p" t ^ e ^k° de Island Locomotive Works for the Indianapolis & Evans-traffi ai wa Y- It was intended to use this kind of engine for the wholeC ^at road, but owing to financial difficulties these engines were0 other companies. The following are their dimensions :
^ a uge of road, .....e tg t of engines, with full supply of fuel and water, -e >ght on driving-wheels, ... -
•arneter of driving-wheels, ....
Total
square feet of heating surface,
Capacity of tank.
Di
ameter of cylinders, -Stroke of pistons, - - ‘ "
Distance from centre of truck to centre of extreme driving-wheel,
distance from centre to centre of driving-wheel,
Length of grate,
Width of grate,
Qutside diameter of smallest boiler-ring,
Number of tubes,
r\*
4 ft. 8)4 in.7 5» 1 9° lbs.45,325 lbs.5° In-iS in.20 in.
Di
ameter of tubes,
19 ft. 6 in.6 ft. 8 in.50 in.4044 in.124.2 in. O. D.10 ft.i4-
020.708.i,5°° galls-
Length of tubes,
Square feet of grate surface,
Square feet of.'heating surface in fire-box,
Square feet of heating surface in tubes,
Total square feet of heating surface,
Capacity of tank, - - ' . ^ Baldw in Locomotive
Fig. 94 represents a locomo iv , It is use d for hauling,
Works for Morgan’s Louisiana & exaS Incline on the levee of the
or rather pushing, freight cars up a very s el T> the road. The
Mississippi Rive,, and to haul the,,; » ' e „ gin e :
following are the dimensions, weig > ’
Gauge of road, - ' ", . . , „ rr . fpr
Weight of engines, with full supply of fuel anWeight on driving-wheels, - _
Diameter of driving-wheels, " " _ .
Diameter of cylinders,
£:«„t,e o< t„ch to centre ext,e»e On**-wheel -
Distance from centre to centre of driving-wheels,
Length of grate, - _
Width of grate, -
Outside diameter of smallest boiler-ring,
Number of tubes, -Diameter of tubes,
Length of tubes, -
Square feet of grate surface,
Square feet of heating surface in fire-box,
Square feet of heating surface in tubes,
Total square feet of heating surface,
Capacity of tank, - ' " . lan use d for suburban
Fig. 95 represents a heavy locomotive o 1 Puilt by the Schen-
traffic on the New York & Harlem Railroad. ^ R wdS
ectaxly Locomotive Works, at Schenectady , N. V. ^ ^j ew York and
Engines of this kind are used for the trains ietweWilliams’ Bridge.
4 ft. 8)4 in.70,000 lbs.56,000 lbs.49 in.
, 17 in.24 ^ in.
18 ft.7 ft. 6 in.
5 8 nr in -34^8 in.48 in.144 .2 in.11 ft. 8 in.I3-75-5 8 -5-8 73-93!-5-700 galls.
he.
„ , a distance of eleven miles. 1 hese trains are ofte ^ >
- av y, owing to excursions, races, etc., ami, as the stopping places a )C ° Se to gether, very powerful engines are required for the service.
The general plan of these engines is that which was patented by Mr.M. N. Forney. The frames which extend back of the fire-box are continu-ous, although they do not appear to be so in the engraving. The West-inghouse brake has been applied to the truck and also to the driving-wheels. Owing to the great weight on the latter and the power which thebrake exerts on them and also on the truck, the engine can be stoppedvery quickly, and as there is plenty of adhesion, trains can be started with-out much danger of slipping. The following are the principal dimensionsof these engines :
Gauge of road, - - - - -
Total wheel-base, ------
Distance between centres of front and back driving-wheels,
Total weight of locomotive in working order,
Total weight on driving-wheels,
Diameter of driving-wheels, -Diameter of t truck-wheels, -
Diameter of cylinders, -----Stroke of cylinders, - - - -
Outside diameter of smallest boiler-ring,
Size of grate, -
Number of tubes,
Diameter of tubes, -Length of tubes, -Square feet of grate surface,
Square feet of heating surface in fire-box,Square feet of heating surface in tubes,Total feet of heating surface,
Exhaust nozzles—single or double, -Diameter of nozzle,
Size of steam-ports, - - -
Size of exhaust-ports,
Throw of eccentrics, -
Outside lap of valve, -
Inside lap of valve, -
Size of main-driving-axle journal,
Size of other driving-axle journal,
Size of truck-axle journal,
Diameter of pump plunger, -Stroke of pump plunger, -Capacity of tank,
in.
in.
in.
in.
4 ft. 8)4 in.20 ft. 11 in.6 ft. 8 in.72,000 lbs.49,5°° lbs.48 in.26i52044/^
35 X53 m.J 44-
*2 in. O. D.9 ft. 6)4 in.18.5.81.
7 IO -4-804.28.Double.2)4 in.1 ft. 13 in.ft. 13 in.4/4 in.Ik in.
tV in.
6)4 x 8 in.6)4 x 8 in.
3^x6 in.
4 X in-3/4 in.
1,200 galls.
NARROW-GAUGE DOUBLE-TRUCK LOCOMOTIVE.By Ups Masoi) Machine Works, Tauntot], Mass,
Pig. 96.
So much has been written in favor of locomotives with two trucks—to which Mr. Fairlie has given his name—in the Fluropean engineeringpapers, and so little is known experimentally about them on this side ofthe Atlantic, that the accompanying engraving will have especial interestas being the first “ double-bogie ” engine with a single boiler builtin this country.
The construction of the engine will be apparent from a very casualinspection of the engraving, and, as will be observed, is similar to that ofthe engines designed by Mr. McDonnell, Engineer of the Great Southern& Western Railroad of Ireland . The details of the one are, however,English , while those of the other have been thoroughly Americanized, andshow marks of Mr. Mason’s good taste all over the engine. There are,however, several features in the design of the “ Onward ” which arepeculiar. As in the engines referred to, the driving-wheels and cylindersare on a truck or “ bogie ” frame, and are consequently free to turn arounda centre-pin and thus adjust themselves to the curvature of the track. Onthe engines of Mr. McDonnell this centre-pin is attached to the mainframe of the engine. On Mr. Mason’s engine it is held by a cast-ironsaddle fastened to the boiler. The latter must, therefore, serve as themain frame. While this may be quite practicable for so small an engineas the one illustrated, it is obvious that the shocks and strains of a largerlocomotive would be very destructive to the boiler, and, therefore, onlarger machines, Mr. Mason intends to attach the centre-pins of the trucksto a main frame extending from the one to the other, and nearly the wholelength of the engine.
Of the merits of this plan of engine we have taken occasion to speakheretofore. There are some advantages which are peculiarly adapted tonarrow-gauge roads. One difficulty about the construction of engines forsuch lines is, that the space between the wheels and frames is too con-tracted for the fire-box. In the above plan its width is entirely independ-ent of the wheels and frames, and therefore can be made as wide as it isdesirable. This will be an advantage on any gauge less than five feet.
The “ double bogie ” will also enable the engine to run equally welleither way on a straight or curved track, an advantage which is quite im-