MAY, 1913. AMERICAN ENGINEER. 233
will evaporate about 5 per cent. less per square foot of evaporative cator valve, Franklin poeumatic fire doors, feed water connec
licating surface.
In the following table an opportunity is given for comparing
this design with other large Mikado locomotives of recent design.
Road.
Total weight, lbs.
Weight on drivers, lbs.
C. R. I. C. R.
& Q.
318,850 303,990
231,000
76.4
60,000
3.85
1.. 8. &
M. S.
322,000
C&O.
315,000
.245.109
243.000
243.200
76.2
56.050
72.1
60.5011
4.37
Average weight pes deiving axle, lbs.. 61,250
4.00
60.750
76.3
57.100
4.20
60.500
53,750
Per cent. weight on drivers..
Tractive effort. lbs.
Factor of adhesion
tions, cold water sprinklers, and radial buffers, a special design
of pipe clamp, a new water glass shield, and very long main
driving boxes.
An interesting feature of the design is the extensive use of
vanadium steel and iron for various parts. This material is used
for the main frame, driving springs, piston rods, main and side
rods, driving axles, trailer springs and main rod straps, as well
as for the links, link blocks, pins and bushings in the notion
185
15417
-00708-
87%
-2/6
295, 2" Tubes
43. 5 Fluss
-423-
Tote Flan toe Stay Bolly
Nacked &
Flush Slagbolts
Marked
25 Inside Shorte
Straight Top Boller Without Combustion Chamber; Lake Shore 2-8-2 Type Locomotive.
62
Cylinders, diameter and stroke, in...27 x 30
Diameter of drivers, in......
Steam pressure, s.....
29 x 28
56
36
23 x 30
63
28 x 32
190
120
260
Ileating surface, evaporating, st. it...
Heating surface, superheater, sq. ft.
Ratio exap. 1a super. heat. surface...
Equivalent caring surface, sq. ft.....
Maximean theoretical horsepower.
Evaporation per sq: ft. heoting
suriacci
4.730
4,053
4,264
180
4,627
1,005
845
4.4
4.8
849
5.03
6.328
5,319
5.536
2.610
2,500
2,470
11.60
12.95
961
4.82
6,069
2,470
12.15 11.20
"Taken at 100 . piston speed and 62 per cent, maximum tractive effort.
Evaporating surface only. 23 lbs. of witer per ansepower fums assumed.
work of ten of the locomotives. The cylinders are also made of
cast iron with a vanadium content,
Reference to the illustration and table of dimensions will show
the features of the very large boiler which has been applied. It
will be noticed that this design differs from customary practice
in but few particulars. The firebox is of a normal radial stay
arrangement, with two fire doors and does not include a com-
bustion chamber. Two inch tubes, 21 ft. in length, are employed
435 lubos
Holes Dritted
4 Diam
235.2" Flues
21 Pitch
Holes Dritted
Diam,
21-
12711
F
5*5*4 GA a
492 12 43,5ives Holes Drilled Diam. 295, 2 Tubes, Pitch Hales Brilled Diam. Tubes Marked Thus Beaded Over 75x114 Inside Sheets Sections of the Firebox and Boiler; Lake Shore Mikados. In general features of construction the design is normal and is thoroughly modern in every particular. A number of new features of a minor, but important, nature have been included, some of them being used on this locomotive for the first time. Among these might be mentioned the MacBain auxiliary lubri- and are distributed in the normal manner. The superlicater cle- ments are included in forty-three 58 in, superheater flues. An improvement, which is now being applied to a number of the more recent locomotive hoilers, is an inspection maniole. 16% in. in diameter. located just back of the dome and about 2 ft. ahead of
