Central of Georgia 4-4-0 "American" Type Locomotives

Class 1233 (Locobase 7923)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase's date and boiler pressure are estimates, but clearly these were small, light Eight-wheelers with a profile typical of the first two decades after the Civil War. Given the other Central of Georgia Eight-wheelers for which the date and BP are know, the numbers given in the specs are close if not exact.

Class 1234 (Locobase 7924)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Riding on 63" drivers, this set of mixed-traffic Eight-wheelers from the railroad's shops were joined by 3 similar Baldwin engines using 56" drivers. By 1925, the C of Georgia diagram was showing 14.7 sq ft of arch tubes in the firebox, which increased direct heating surface to 116.7 sq ft.

Class 1529 (Locobase 7925)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Early Eighties Eight-wheelers from Baldwin that enjoyed a long enough life to appear in the 1925 & 1927 Locomotive diagrams. By then the diagrams showed 14.7 sq ft of arch tubes as part of the firebox heating surface. A few had 56" drivers.

Class 1551 (Locobase 7926)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

As the Eighties went on, the C of Ga Eight-wheelers gradually grew. The boiler had a few more tubes and the grate was a smidge larger.

Class 1558 (Locobase 7927)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

These Dickson engines (works# 667-672) fell into the middle of the range of American Eight-wheelers (Americans?) of the period in most dimensions. One noticeable difference was the relatively low boiler pressure (at least as shown in 1925).

Class 1564 (Locobase 7928)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Relatively small, short boiler on these Rhode Island locomotives (works# 2072-2073).

Class 1567 (Locobase 7929)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

As the Eighties faded into the Nineties, Baldwin supplied this pair of Eight-wheelers (works# 10859 and 10848), which were a bit bigger than earlier C of Ga engines. Even so, they sat squarely in the third quartile of 4-4-0s delivered to US railroads during the period.

Class 1571 (Locobase 7933)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Four of the Eight-wheelers delivered by Baldwin in 1890 (works #11078-11080, 11083) differed from those described in Locobase 7929 in having 1" greater diameter cylinders .

Class 1575 (Locobase 7934)

Data from CofGa 1905 and CofGa 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Three of the Rhode Island locomotives to serve the C of Ga arrived in 1889; two (works #2075-2076) had 63" drivers, the other (works #2074 shown in the specs) stood on 69" drivers. All had 18 sq ft of arch tubes that contributed to the engines' firebox heating surface.

Class 1578 (Locobase 7935)

Data from CofGa 12 - 1925 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. The original class may have included at least 16 locomotives; the works numbers ran 11998, 12009, 11994, 11995, 12001.

This class of Baldwin Eight-wheelers had slender, high-pitched boilers that nevertheless had the firebox dropped between the driving axles. The steam dome sat ahead of the firebox and over the front driving axle and the sand dome halfway between the steam dome and the inversely tapered stack. The first two had 69" drivers, but only the first had its boiler pressure set at 155 psi. 1586's 168 psi setting and 63" drivers yielded 17,590 lb tractive effort.

1585, which had the same specifications but 170 psi in the boiler and 69" drivers (16,524 lb TE) and 1586 (63" drivers) arrived in 1892 and had the later pair of works numbers 13086 and 13086.

Class 1584 (Locobase 7936)

Data from CofGa 12 - 1925 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase 7935 shows the Baldwin Eight-wheeler class with the 71 1/2" length grate. This one (works #12864) had a slightly longer grate (74") and consequently larger grate area, but the firebox was slightly smaller.

Class 1587 (Locobase 7937)

Data from CofGa 12 - 1925 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase doesn't understand why this Eight-wheeler has such a high boiler number (works #28233) when its specs so resembled an early 1890s locomotive. He suspects that this was in fact a later replacement on an earlier frame and running gear.

Specifications
Class	1233	1234	1529	1551	1558	1564	1567	1571	1575	1578	1584	1587
Locobase ID	7923	7924	7925	7926	7927	7928	7929	7933	7934	7935	7936	7937
Railroad	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia	Central of Georgia
Whyte	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0
Road Numbers	1233+ , 1513+	1522, 1542-45, 48	1529-1537, 1553	1551-1552	1558-1563	1564-1565	1567-1568	1571-1574	1575-1577	1578, 1580-1583, 1585-86	1584	1587
Gauge	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std
Builder	Burnham, Parry, Williams & Co	Central of Georgia	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Dickson	Rhode Island	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Rhode Island	Burnham, Williams & Co	Burnham, Williams & Co	Burnham, Williams & Co
Year	1882	1887	1882	1889	1888	1889	1890	1890	1889	1891	1892	1903
Valve Gear	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	8'	8'	8'	8.25'	8.75'	8.58'	8.75'	8.75'	9.08'	8.50'	8.83'	9.08'
Engine Wheelbase	21.67'	21.67'	21.75'	23.25'	23.04'	22.65'	22.65'	22.92'	23.16'	23.12'	22.85'	23.92'
Ratio of driving wheelbase to overall engine wheebase	0.37	0.37	0.37	0.35	0.38	0.38	0.39	0.38	0.39	0.37	0.39	0.38
Overall Wheelbase (engine & tender)	45.17'	45.17'	45'	46.42'	46.42'	46.10'	46.50'	46.42'	46.65'	46.65'	46.45'	46.45'
Axle Loading (Maximum Weight per Axle)	22500 lbs	24750 lbs	24750 lbs
Weight on Drivers	51000 lbs	49500 lbs	49500 lbs	54000 lbs	59000 lbs	57300 lbs	63050 lbs	64400 lbs	60900 lbs	63050 lbs	62600 lbs	72000 lbs
Engine Weight	79500 lbs	77000 lbs	77000 lbs	83000 lbs	92000 lbs	89400 lbs	101550 lbs	98400 lbs	96100 lbs	101530 lbs	101000 lbs	112000 lbs
Tender Light Weight	70300 lbs	63000 lbs	58000 lbs	55800 lbs	56200 lbs	69200 lbs	76900 lbs	72200 lbs	72200 lbs	76700 lbs	93500 lbs	62000 lbs
Total Engine and Tender Weight	149800 lbs	140000 lbs	135000 lbs	138800 lbs	148200 lbs	158600 lbs	178450 lbs	170600 lbs	168300 lbs	178230 lbs	194500 lbs	174000 lbs
Tender Water Capacity	2500 gals	3000 gals	2100 gals	2500 gals	3000 gals	3000 gals	3000 gals	3000 gals	3000 gals	3500 gals	5000 gals	3000 gals
Tender Fuel Capacity (oil/coal)	6 tons	6 tons	7 tons	6 tons	7 tons	7 tons	7 tons	7 tons	7 tons	7 tons	7 tons	7 tons
Minimum weight per yard of rail on which locomotive could run	43 lb rail	41 lb rail	41 lb rail	45 lb rail	49 lb rail	48 lb rail	53 lb rail	54 lb rail	51 lb rail	53 lb rail	52 lb rail	60 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	56"	63"	63"	56"	63"	63"	63"	63"	69"	63"	63"	62"
Boiler Pressure	130 psi	133 psi	145 psi	145 psi	125 psi	147 psi	150 psi	153 psi	144 psi	160 psi	165 psi	160 psi
Cylinders (dia x stroke)	16" x 24"	16" x 24"	16" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	18" x 24"	18" x 24"	18" x 24"	18" x 24"	18" x 24"
Tractive Effort	12123 lbs	11025 lbs	12020 lbs	15265 lbs	11698 lbs	13756 lbs	14037 lbs	16052 lbs	13794 lbs	16786 lbs	17311 lbs	17057 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.21	4.49	4.12	3.54	5.04	4.17	4.49	4.01	4.41	3.76	3.62	4.22
	Heating Ability
Firebox Area	102.30 sq. ft	103 sq. ft	111.60 sq. ft	129.10 sq. ft	144.60 sq. ft	142.60 sq. ft	146 sq. ft	146 sq. ft	157 sq. ft	152.70 sq. ft	149 sq. ft	148 sq. ft
Grate Area	15 sq. ft	15 sq. ft	15 sq. ft	15.80 sq. ft	17.30 sq. ft	17.50 sq. ft	17 sq. ft	17 sq. ft	19 sq. ft	17 sq. ft	17.60 sq. ft	18.60 sq. ft
Evaporative Heating Surface	925	1133	1038	1226	1320	1227	1478	1478	1361	1574	1575	1650
Superheating Surface
Combined Heating Surface	925	1133	1038	1226	1320	1227	1478	1478	1361	1574	1575	1650
Evaporative Heating Surface/Cylinder Volume	165.62	202.86	185.85	194.45	209.36	194.61	234.42	209.09	192.54	222.68	222.82	233.43
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	1950	1995	2175	2291	2163	2573	2550	2601	2736	2720	2904	2976
Same as above plus superheater percentage	1950	1995	2175	2291	2163	2573	2550	2601	2736	2720	2904	2976
Same as above but substitute firebox area for grate area	13299	13699	16182	18720	18075	20962	21900	22338	22608	24432	24585	23680
Power L1	3121	4121	4351	4017	4253	4749	5516	5018	5028	5556	5686	5590
Power MT	269.83	367.08	387.57	328.00	317.84	365.44	385.75	343.56	364.03	388.54	400.49	342.33