Missouri-Kansas-Texas 4-6-0 "Ten-Wheeler" Type Locomotives

Class F (13 1/2) (Locobase 7726)

Data from MKT 1903 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The Katy dabbled with Ten-wheeler compounds for a few years. This class had two sizes of cylinders, both supplied by Baldwin in 1893; see Locobase 7727 for the other that had slightly larger cylinder volume.

Class F (14) (Locobase 7727)

Data from MKT 1903 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

As noted in Locobase 7726, this class was delivered with two sizes of cylinders. The current record has the larger volume. In both cases, the LP cylinders were a little too big for the HP cylinders.

Class F1 (Locobase 7728)

Data from MKT 1903 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

As noted in Locobase 7726, this class was delivered with two sizes of cylinders. The current record has the larger volume. In both cases, the LP cylinders were a little too big for the HP cylinders.

Class F2 (Locobase 7712)

Data from MKT 1904 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

This pair was built by the Katy at the same time as the B2s shown in Locobase 7709, but these had taller drivers and hence a longer wheelbase.

Class G-5-b (Locobase 7734)

Data from MKT 1946 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

These light Ten-wheelers were the middle set of three G-5 subclasses. Unlike many Katy locomotives, these were never superheated and retained their slide valves to the end of their service. Drury (1993) explains that as Pacific types took over the runs they had handled, they "found themselves unemployed ...by 1940 all were gone."

Class G-8-a (Locobase 7735)

Data from MKT 1946 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

These Ten-wheelers were part of a series of relatively high-drivered 4-6-0s that constituted passenger power on the Katy until the Pacifics came along. As shown in this entry, the MKT later superheated the boilers and fitted piston valves, but retained the inside Stephenson link motion. All Ten-wheelers had been retired by 1940.

Class G-8-b (Locobase 7736)

Data from MKT 1946 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Although the Baldwins of 1906 (Locobase 7735) were the first of the fast passenger Ten-wheelers on the Katy, these Schenectady locomotives were larger and outnumbered the earlier engines. The present entry shows this set in its superheated update with piston valves actuated by inside Stephenson link motion.

Specifications
Class	F (13 1/2)	F (14)	F1	F2	G-5-b	G-8-a	G-8-b
Locobase ID	7726	7727	7728	7712	7734	7735	7736
Railroad	Missouri-Kansas-Texas (MKT)	Missouri-Kansas-Texas (MKT)	Missouri-Kansas-Texas (MKT)	Missouri-Kansas-Texas (MKT)	Missouri-Kansas-Texas (MKT)	Missouri-Kansas-Texas (MKT)	Missouri-Kansas-Texas (MKT)
Whyte	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0
Road Numbers	288-293	287, 294-295	303-307	308-317	231-238	258-267	268-288
Gauge	Std	Std	Std	Std	Std	Std	Std
Builder	Burnham, Williams & Co	Burnham, Williams & Co	Burnham, Williams & Co	Burnham, Williams & Co	Burnham, Williams & Co	Burnham, Williams & Co	Alco-Schenectady
Year	1893	1893	1899	1902	1905	1906	1909
Valve Gear	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	12.33'	12.33'	13.33'	8.50'	13.33'	13.83'	13.83'
Engine Wheelbase	24.17'	24.17'	24.42'	23.25'	24.58'	25.17'	25.17'
Ratio of driving wheelbase to overall engine wheebase	0.51	0.51	0.55	0.37	0.54	0.55	0.55
Overall Wheelbase (engine & tender)	42.60'	42.60'	51.92'	44.71'	56.46'	57.06'	60.62'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	104400 lbs	104400 lbs	98230 lbs	128360 lbs	104000 lbs	132450 lbs	143000 lbs
Engine Weight	139400 lbs	139400 lbs	136000 lbs	163350 lbs	147400 lbs	179950 lbs	184500 lbs
Tender Light Weight	86600 lbs	86600 lbs	95600 lbs	126650 lbs	132000 lbs	136600 lbs	158000 lbs
Total Engine and Tender Weight	226000 lbs	226000 lbs	231600 lbs	290000 lbs	279400 lbs	316550 lbs	342500 lbs
Tender Water Capacity	4000 gals	4000 gals	4300 gals	6000 gals	6500 gals	6500 gals	8000 gals
Tender Fuel Capacity (oil/coal)	8 tons	8 tons	9 tons	12 tons	2720 gals	2720 gals	2720 gals
Minimum weight per yard of rail on which locomotive could run	58 lb rail	58 lb rail	54.57 lb rail	71.31 lb rail	57.78 lb rail	73.58 lb rail	79.44 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	69"	69"	62"	72"	68"	73"	73"
Boiler Pressure	180 psi	180 psi	180 psi	200 psi	200 psi	200 psi	200 psi
Cylinders (dia x stroke)	13.5" x 26"	14" x 28"	19.5" x 26"	20" x 26"	19" x 26"	20" x 28"	21" x 28"
Low Pressure Cylinders (dia x stroke)	23" x 26"	24" x 28"	" x "	" x "	" x "	" x "	" x "
Tractive Effort	15630 lbs	18159 lbs	24397 lbs	24556 lbs	23465 lbs	26082 lbs	28756 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	6.68	5.75	4.03	5.23	4.43	5.08	4.97
	Heating Ability
Firebox Area	132 sq. ft	132 sq. ft	137 sq. ft	171 sq. ft	141 sq. ft	162 sq. ft	163 sq. ft
Grate Area	23 sq. ft	23 sq. ft	29.10 sq. ft	30.97 sq. ft	28.70 sq. ft	30.60 sq. ft	31.50 sq. ft
Evaporative Heating Surface	1803	1803	2144	2742	2329	1722	1986
Superheating Surface						372	500
Combined Heating Surface	1803	1803	2144	2742	2329	2094	2486
Evaporative Heating Surface/Cylinder Volume	418.58	361.41	238.56	290.04	272.97	169.14	176.93
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	4140	4140	5238	6194	5740	6120	6300
Same as above plus superheater percentage	4140	4140	5238	6194	5740	7207.22	7567.10
Same as above but substitute firebox area for grate area	23760	23760	24660	34200	28200	38155.87	39156.72
Power L1	4077.83	3477.59	5855.00	9131.50	8060.21	14053.51	15827.46
Power MT	258.34	220.31	394.22	470.51	512.59	701.76	732.03