New Haven 2-6-0 "Mogul" Type Locomotives

Class K-1 superheated (Locobase 8117)

Data from NH 1962 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase 813 shows the large class of Moguls delivered to the New Haven as main-line freight engines. Obviously this arrangement, while of decreasing value as a fast freight engine running ahead of the passenger trains, proved highly useful in all kinds of local freight, passenger, even commuter work. So the New Haven removed 137 small tubes in favor of 21 large flues holding a modest amount of superheater area and the cylinders increased 2" in diameter. Walschaert, Baker, and Southern valve gear was fitted depending on sub-class. So compact was the 2-6-0 arrangement that the Southern gear (a variant of the Walschaerts) looks oddly placed outside of the second driving axle.

As so refitted, the Moguls kept on until the end of steam in 1951.

Class K-1-a (Locobase 5870)

Preceding the large K-1 class described in Locobase 813 were these 10, written up in American Engineer & Railroad Journal in 1896. Clearly, John Henney, the NY,NH & H's Superintendent of Motive Power was satisfied with the design delivered by Schenectady. The K-1s that followed 4 years later (Locobase 813) were almost identical except for having tubes 2 inches longer.

Class K-1-b (Locobase 813)

After 40 were split between by Baldwin and Cooke, a follow-up order of 155 was divided among Baldwin, Alco-Schenectady, and Rhode Island. These Moguls lasted a long time, some running as late as 1951, because they could run freights fast enough on passenger lines to avoid clogging up the road.

They were delivered with Stephenson gear, but were superheated in 1913; see Locobase 8117.

Specifications
Class	K-1 superheated	K-1-a	K-1-b
Locobase ID	8117	5870	813
Railroad	New Haven	New Haven	New Haven
Whyte	2-6-0	2-6-0	2-6-0
Road Numbers			260-299, 325-479
Gauge	Std	Std	Std
Builder	Schenectady	Schenectady	several
Year	1913	1896	1900
Valve Gear	various	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	15.17'	15.17'	15.17'
Engine Wheelbase	23.25'	23.25'	23.25'
Ratio of driving wheelbase to overall engine wheebase	0.65	0.65	0.65
Overall Wheelbase (engine & tender)	52.83'		52.66'
Axle Loading (Maximum Weight per Axle)		41500 lbs
Weight on Drivers	142000 lbs	124400 lbs	132700 lbs
Engine Weight	167800 lbs	144200 lbs	153000 lbs
Tender Light Weight			134000 lbs
Total Engine and Tender Weight	0	0	287000 lbs
Tender Water Capacity	4500 gals	4500 gals	7000 gals
Tender Fuel Capacity (oil/coal)	8.5 tons	8.5 tons	tons
Minimum weight per yard of rail on which locomotive could run	78.89 lb rail	69.11 lb rail	73.72 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	63"	63"	63"
Boiler Pressure	190 psi	190 psi	200 psi
Cylinders (dia x stroke)	22" x 28"	20" x 28"	20" x 28"
Tractive Effort	34740 lbs	28711 lbs	30222 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.09	4.33	4.39
	Heating Ability
Firebox Area	181 sq. ft	164.38 sq. ft
Grate Area	30.22 sq. ft	30.22 sq. ft	30.30 sq. ft
Evaporative Heating Surface	1645	2111	2076
Superheating Surface	290
Combined Heating Surface	1935	2111	2076
Evaporative Heating Surface/Cylinder Volume	133.53	207.35	203.91
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	5741.80	5741.80	6060
Same as above plus superheater percentage	6602.33	5741.80	6060
Same as above but substitute firebox area for grate area	39544.06	31232.20	0
Power L1	8356.28	5747.06	0
Power MT	389.21	305.55	0