Delaware & Hudson Other Articulated Locomotives

Class H (Locobase 8952)

Data from Clarence Roberts & Russell M Smith, Practical Locomotive Operating (Philadelphia: J B Lippincott Co, 1912), pp 61,67

These were delivered as pushers and a look at the numbers shows just how dedicated they were to that service. All the weight was adhesive, the drivers were small, the boiler big. Six of the locomotives were later superheated to one standard, the rest to another; see Locobases 8953-8954.

Class H - superheated - 1600 (Locobase 8953)

Data from D & H 1 -1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

For some reason, the D & H chose two different combinations of tubes and flues when they came to superheat these big pusher Mallet Compounds. This was the more superheater-heavy result, a locomotive with considerable amounts of dry steam. It kept the small tender that was delivered in 1909.

Other than the tube arrangement, however, the designs remained essentially as they had been delivered and continued to serve into the 1940s and early 1950s.

Class H - superheated - 1606 (Locobase 8954)

Data from D & H 1 -1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Of the two combinations of tubes and flues adopted by the D & H when they superheated these H-class pusher Mallet Compounds (Locobase 8951), this design retained more of the small tubes and introduced fewer flues. On the other hand, the tender trailed by this subclass was much bigger.

Other than the tube arrangement, however, the designs remained essentially as they had been delivered and continued to serve into the 1940s and early 1950s.

Class H-1 (Locobase 5006)

What a difference between sources. An elevation drawing executed in February 1965 and reproduced on the web states that these two Mallets started live as West Side Belt Railway 0-6-6-0s in 1910 When the D&H bought them in 1917, it converted them to 2-6-6-0s, designated them as H class engines and put them to work in Oneonta.

Drury (1993) says that the Hs were 2 ex-Pittsburgh & West Virginia 2-6-6-0s that were converted to 0-6-6-0s and used as pushers. Richard E. Cooper's compilation of D&H steam power presented in Jim Shaughnessy's 1997 reprint of his 1982 Delaware & Hudson asserts the same.

Specifications
Class	H	H - superheated - 1600	H - superheated - 1606	H-1
Locobase ID	8952	8953	8954	5006
Railroad	Delaware & Hudson	Delaware & Hudson	Delaware & Hudson	Delaware & Hudson
Whyte	0-8-8-0	0-8-8-0	0-8-8-0	2-6-6-0
Road Numbers	1600-1612	1600-1605	1606-1613	1501-1502
Gauge	Std	Std	Std	Std
Builder	Alco-Schenectady	D & H	D & H
Year	1910	1910	1910	1917
Valve Gear	Walschaert	Walschaert	Walschaert	Walschaert
	Locomotive Length and Weight
Driver Wheelbase	14.25'	14.25'	14.25'	10'
Engine Wheelbase	40.17'	40.17'	40.17'	39.33'
Ratio of driving wheelbase to overall engine wheebase	0.35	0.35	0.35	0.25
Overall Wheelbase (engine & tender)	89.30'	89.30'	97.92'	72.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	445000 lbs	464100 lbs	465300 lbs	330300 lbs
Engine Weight	445000 lbs	464100 lbs	465300 lbs	350900 lbs
Tender Light Weight	166800 lbs	133200 lbs	178400 lbs	123000 lbs
Total Engine and Tender Weight	611800 lbs	597300 lbs	643700 lbs	473900 lbs
Tender Water Capacity	9000 gals	9000 gals	14000 gals	8000 gals
Tender Fuel Capacity (oil/coal)	14 tons	14 tons	16 tons	14 tons
Minimum weight per yard of rail on which locomotive could run	93 lb rail	97 lb rail	97 lb rail	91.75 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	51"	51"	51"	55"
Boiler Pressure	220 psi	220 psi	220 psi	235 psi
Cylinders (dia x stroke)	26" x 28"	26" x 28"	26" x 28"	20.5" x 32"
Low Pressure Cylinders (dia x stroke)	41" x 28"	41" x 28"	41" x 28"	33" x 32"
Tractive Effort	98995 lbs	98995 lbs	98995 lbs	70482 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.50	4.69	4.70	4.69
	Heating Ability
Firebox Area	353 sq. ft	353 sq. ft	353 sq. ft	206 sq. ft
Grate Area	100 sq. ft	100 sq. ft	99.85 sq. ft	72.20 sq. ft
Evaporative Heating Surface	6629	5243	5598	5241
Superheating Surface		1395	1180
Combined Heating Surface	6629	6638	6778	5241
Evaporative Heating Surface/Cylinder Volume	385.27	304.72	325.35	428.73
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	22000	22000	21967	16967
Same as above plus superheater percentage	22000	26620	25701	16967
Same as above but substitute firebox area for grate area	77660	93969	90862	48410
Power L1	3669	8550	7860	4264.44
Power MT	145.42	324.92	297.93	170.78