Central RR of New Jersey / Central Railroad of New Jersey 4-4-0 "American" Type Locomotives

Class 166 (Locobase 9675)

Data from Emory Edwards, Modern American Locomotive Engines, (Philadelphia: Henry Carey Baird & Co, 1883), pp. 111-113.

Edwards says nothing about this locomotive other than it's a standard American passenger locomotive. Connelly's list of Baldwin locomotives shows only the two CNJ engines as having 17" x 22" cylinders and 62" drivers. Locobase isn't positive that the specifications in Edwards relate specifically to this pair, particularly given that they were completed 7 years before Edwards' book, but figures they are representative of the time.

Class 450 (Locobase 6457)

Data from Reder (1974, pl 266) and from Taylor, Kenyon & Mathey, "Comparative Test ....", Stevens Indicator (Stevens Institute of Technology, Volume XII, #3 (July 1895), pp. 266-267.

This Vauclain compound design was put up against a conventional 2-cylinder simple locomotive and showed reductions of 19.7% in coal use and 18.7% in water consumption. The illustration shows a classic high-stepping Eight-wheeler of the era. Compared to her simple-expansion sisters, 450 had a third less direct heating surface than they did. The consumption difference derived more from the much greater reduction in high-pressure cylinder volume.

Locobase wonders too about the higher evaporation rate per pound of coal - how does compounding contribute to that except perhaps by reducing the amount of required steam and allowing for more complete heat transfer from firebox and tubes to the water.

Class 451 (Locobase 8401)

Data from Taylor, Kenyon & Mathey, "Comparative Test ....", Stevens Indicator (Stevens Institute of Technology, Volume XII, #3 (July 1895), pp. 266-267.

This was the conventional class of simple-expansion Eight-wheelers that served as trial horses for the 4-cylinder compound described in Locobase 6457. Compared to the compound variant, this class had much more firebox heating surface. See the compound entry for the results.

Class D-9s (Locobase 5363)

Data from table in June 1906 AERJ. These camelbacks used the wide Wootten fireboxes to burn anthracite. According to Drury (1993), these were the heaviest Americans ever built. (He credits them with 173,600 lb, over 6 tons more than when built.) The last of their line (and the only class built after the turn of the century), the trio was retired in 1934.

Specifications
Class	166	450	451	D-9s
Locobase ID	9675	6457	8401	5363
Railroad	Central Railroad of New Jersey	Central RR of New Jersey	Central RR of New Jersey	Central RR of New Jersey
Whyte	4-4-0	4-4-0	4-4-0	4-4-0
Road Numbers	166-167	450	451-455	852-854 (later 557-559)
Gauge	Std	Std	Std	Std
Builder	Burnham, Parry, Williams & Co	Burnham, Williams & Co	Burnham, Williams & Co	Alco-Brooks
Year	1876	1893	1893	1905
Valve Gear	Stephenson	Stephenson	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	8.50'	7.50'	7.50'	8.25'
Engine Wheelbase	22.42'	22.29'	22.29'	23.12'
Ratio of driving wheelbase to overall engine wheebase	0.38	0.34	0.34	0.36
Overall Wheelbase (engine & tender)	44.21'	49.25'	49.25'	49.17'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	51500 lbs	87750 lbs	88400 lbs	111300 lbs
Engine Weight	75000 lbs	124450 lbs	126250 lbs	161300 lbs
Tender Light Weight		81400 lbs	81400 lbs	122200 lbs
Total Engine and Tender Weight		205850 lbs	207650 lbs	283500 lbs
Tender Water Capacity	2200 gals	3000 gals	3500 gals	5000 gals
Tender Fuel Capacity (oil/coal)				12 tons
Minimum weight per yard of rail on which locomotive could run	43 lb rail	73 lb rail	74 lb rail	93 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	62"	78"	78"	69"
Boiler Pressure	130 psi	180 psi	180 psi	200 psi
Cylinders (dia x stroke)	17" x 22"	13" x 24"	20" x 24"	19" x 26"
Tractive Effort	11332 lbs	11794 lbs	18831 lbs	23125 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.54	7.44	4.69	4.81
	Heating Ability
Firebox Area	112 sq. ft	166 sq. ft	224 sq. ft	167.60 sq. ft
Grate Area	24 sq. ft	38.50 sq. ft	38.50 sq. ft	81.60 sq. ft
Evaporative Heating Surface	1065	1696	1708	2006
Superheating Surface
Combined Heating Surface	1065	1696	1708	2006
Evaporative Heating Surface/Cylinder Volume	184.27	459.99	195.72	235.11
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	3120	6930	6930	16320
Same as above plus superheater percentage	3120	6930	6930	16320
Same as above but substitute firebox area for grate area	14560	29880	40320	33520
Power L1	3777	5598	7583	7667
Power MT	323.37	281.29	378.23	303.73