loco-info.com - Wabash classes F-4 and F-5

No. 571 in August 1939 in Decatur, Illinois

Paul W. Prescott / collection Taylor Rush

The Wabash Railroad had a total of 38 Moguls built in 1899, which came from three manufacturers and were initially classed as class I. A total of 18 locomotives were built by the Richmond Locomotive Works and Baldwin and had a large firebox for their time and a relatively small boiler. 15 other locomotives came from the Rhode Island Locomotive Works and had a larger boiler. All of these simple-expansion locomotives were later classified as F-4. Also built by Rhode Island and Richmond were five two-cylinder compound locomotives which later became the class F-5.

Variant	F-4 Richmond, Baldwin	F-4 Rhode Island	F-5

General
Built	1899
Manufacturer	Richmond, Baldwin	Rhode Island	Rhode Island, Richmond
Axle config	2-6-0 (Mogul)
Gauge	4 ft 8 1/2 in (Standard gauge)

Dimensions and Weights
Wheelbase	22 ft 4 in		22 ft 7 in
Rigid wheelbase	14 ft
Total wheelbase	48 ft 6 in		48 ft 8 in
Service weight	123,525 lbs	128,000 lbs	123,525 lbs
Adhesive weight	105,525 lbs
Total weight	219,825 lbs	224,300 lbs	219,825 lbs
Axle load	37,590 lbs
Water capacity	4,500 us gal
Fuel capacity	20,000 lbs (coal)

Boiler
Grate area	32 sq ft	31.2 sq ft	32 sq ft
Firebox area	154 sq ft	153.2 sq ft	164 sq ft
Tube heating area	1,453 sq ft	1,563.8 sq ft	1,443 sq ft
Evaporative heating area	1,607 sq ft	1,717 sq ft	1,607 sq ft
Total heating area	1,607 sq ft	1,717 sq ft	1,607 sq ft

Variant	F-4 Richmond, Baldwin	F-4 Rhode Island	F-5

Power Plant
Driver diameter	63 in
Boiler pressure	185 psi	195 psi
Expansion type	simple	compound
Cylinders	two, 19 x 28 in	two, HP: 20 1/2 x 28 in and LP: 32 1/2 x 28 in

Power
Power source	steam
Estimated power	900 hp (671 kW)	910 hp (679 kW)	940 hp (701 kW)
Starting effort	25,230 lbf		22,147 lbf
with start valve			26,576 lbf

Calculated Values
Factor of adhesion	1 : 4.18		1 : 3.97
Optimal speed	23 mph		27 mph
Power-to-weight ratio	0.0073 hp/lb	0.0071 hp/lb	0.0076 hp/lb
Heating Area Equivalent	2,376.8 sq ft	2,483 sq ft	2,426.8 sq ft
Cylinder volume/HAE	1 : 1178.33	1 : 1127.91	1 : 1154.05
Adhesive weight/Total	1 : 1.17	1 : 1.21	1 : 1.17
Tractive force/Heating area	1 : 3529.52	1 : 3303.39	1 : 3717.87
Grate area/Heating area	1 : 45.45	1 : 50.11	1 : 45.14
Firebox/Tube area	1 : 9.44	1 : 10.21	1 : 8.80
HP/LP cylinders			1 : 2.51

steam locomotive

freight

passenger

last changed: 04/2023

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