Some of the first of the MKT's many Moguls. They later served as switchers. See Locobase 7716 for the Baldwins of the same year.
These Baldwins were smaller and had smaller drivers than the Hinkley Moguls that arrived on the Katy in the same year. Like the D2s, these later served as switchers.
This was a relatively big Mogul for its time with a long wheelbase. The low drivers emphasize the type's devotion to freight duties.
This was one of the first of the big classes of Moguls on the Katy. They established the essential power dimensions used for several years, including the relatively short stroke of 22".
Compared to many other Moguls of the time, this design from the Paterson builder was small and had a short wheelbase. It also had an unusually square set of cylinder dimensions in which the stroke was quite short. Perhaps this represented an adjustment to small drivers.
This was one of the most numerous single classes to operate on the Katy. In fact it was one of the biggest batches of Moguls to enter service in that period. Compared to other 2-6-0 designs, the D4 had a relatively large boiler married to an average grate. In many respects, it was a typical Mogul of its day and the Katy must have been satisfied.
Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004.
Works #2530-2534. Rumary-Lambert give 57" as the driver diameter, but the catalogue rules.
Straight-top boiler on this Missouri-Kansas-Texas light Mogul and the large cowcatcher that would soon disappear along with the large oil-fired headlight..
Very similar to the D4s of a slightly earlier vintage, this class was supplied by 3 builders. Baldwin delivered 252-254 & 264-265, Brooks added 255-259, and Richmond completed the order with 260-263.
Pittsburgh continued the line of very similar Moguls with the first five, which featured an increased stroke. Richmond followed a year later with 10 more to the same design. Compared to the earlier locomotives, the D6s had a wider, shallower firebox that had less total heating surface.
Apparently derived from the same builder's D4s supplied to the Katy a decade earlier (Locobase 7719), these locomotives had only slightly longer tubes, a smallish firebox but a larger grate. The heat generator supplied a bigger set of cylinders at a higher pressure, so any concern over having enough steam must have held at a relatively low level.
Perhaps the Katy told Baldwin that the boiler that was big enough for 19" x 24" cylinders (Locobase 7719) was too small when they lengthened the stroke and increased the boiler pressure (Locobase 7720). Regardless of why, a year later Baldwin supplied this class, which was identical except for the greater number of tubes in the boiler barrel.
As Baldwin was delivering a medium-sized Mogul, Schenectady was contributing this quintet of similar locomotives. It was in preparation for the considerably bigger ones that would follow a year later (Locobase 7723).
This could be described as the Katy's definitive Mogul considering how many would be delivered. Baldwin and Schenectady delivered the 125 shown in 5 years. Compared to earlier 2-6-0s, these had a bigger grate (although the firebox wasn't commensurately bigger) and more tubes in a slightly longer boiler. The whole heat engine stood on the taller drivers that would mark the Mogul as a mixed-traffic locomotive.
Many were later superheated; see Locobase 7733.
Locobase is surprised by the amount of evaporative heating surface sacrificed in these rebuilds of the Baldwin D8s of 1902 (Locobase 7722). According to Drury (1993), the project to superheat, substitute piston valves for slide valves, and add weight to the engine eventually included most of the D8s. In 1938, those that still remained on the books (at 35 but probably many more) were converted to oil-firing and had their boiler pressure raised to 210 psi. The result was a potent and relatively new locomotive and many operated into the 1950s.
| Specifications | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class | D1 | D2 | D3 | D3 | D3 | D4 | D4 | D5 | D6 | D7 | D7 | D7 | D8 | J-5-c (rebuilt D8) |
| Locobase ID | 7715 | 7716 | 7710 | 7718 | 7717 | 7719 | 2622 | 7724 | 7725 | 7720 | 7721 | 7722 | 7723 | 7733 |
| Railroad | Missouri-Kansas-Texas (MKT) | Missouri-Kansas-Texas (MKT) | Denison & Washita (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) | Missouri-Kansas-Texas (MKT) | Missouri-Kansas-Texas (MKT) | Missouri-Kansas-Texas (MKT) | Missouri-Kansas-Texas (MKT) | Missouri-Kansas-Texas (MKT) |
| Whyte | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 |
| Road Numbers | 199-201 | 89-90, 93-94 | 1 | 150-169 | 127-146 | 170-99,201-229, 232,235 | 225-229 / 176-180 | 252-265 | 266-270, 400-409 | 410-30,448-53,455-56 | 457-471 | 443-447 | 476-600 | various |
| Gauge | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std |
| Builder | Hinkley | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Rogers | Burnham, Parry, Williams & Co | Brooks | several | several | Burnham, Williams & Co | Burnham, Williams & Co | Schenectady | several | MKT |
| Year | 1875 | 1875 | 1889 | 1880 | 1883 | 1889 | 1895 | 1895 | 1898 | 1900 | 1901 | 1901 | 1902 | 1923 |
| Valve Gear | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson |
| Locomotive Length and Weight | ||||||||||||||
| Driver Wheelbase | 15.50' | 14.67' | 15.17' | 12.67' | 12.67' | 12.67' | 12.67' | 12.67' | 13.33' | 13.33' | 13.33' | 14' | 15' | 15' |
| Engine Wheelbase | 22.92' | 22.50' | 23.17' | 20.25' | 20.08' | 20.12' | 20.12' | 20.12' | 21.25' | 21.25' | 21.25' | 21.83' | 23.58' | 25.42' |
| Ratio of driving wheelbase to overall engine wheebase | 0.68 | 0.65 | 0.65 | 0.63 | 0.63 | 0.63 | 0.63 | 0.63 | 0.63 | 0.63 | 0.63 | 0.64 | 0.64 | 0.59 |
| Overall Wheelbase (engine & tender) | 44.87' | 42.87' | 43.58' | 44.96' | 43.87' | 45.54' | 44.98' | 45.33' | 46.57' | 49.54' | 49.54' | 49.58' | 51.27' | 59.02' |
| Axle Loading (Maximum Weight per Axle) | ||||||||||||||
| Weight on Drivers | 79000 lbs | 74500 lbs | 84500 lbs | 79300 lbs | 76000 lbs | 91750 lbs | 105000 lbs | 106800 lbs | 108200 lbs | 112490 lbs | 112490 lbs | 113000 lbs | 133100 lbs | 146000 lbs |
| Engine Weight | 93800 lbs | 88000 lbs | 102500 lbs | 90900 lbs | 86000 lbs | 104850 lbs | 121000 lbs | 124000 lbs | 122400 lbs | 131200 lbs | 131200 lbs | 130500 lbs | 155000 lbs | 170000 lbs |
| Tender Light Weight | 66200 lbs | 67800 lbs | 85100 lbs | 70800 lbs | 70800 lbs | 76300 lbs | 85000 lbs | 88800 lbs | 95600 lbs | 95600 lbs | 95600 lbs | 106100 lbs | 106100 lbs | 160400 lbs |
| Total Engine and Tender Weight | 160000 lbs | 155800 lbs | 187600 lbs | 161700 lbs | 156800 lbs | 181150 lbs | 206000 lbs | 212800 lbs | 218000 lbs | 226800 lbs | 226800 lbs | 236600 lbs | 261100 lbs | 330400 lbs |
| Tender Water Capacity | 2900 gals | 3000 gals | 3000 gals | 3000 gals | 3000 gals | 3400 gals | 4000 gals | 4000 gals | 4300 gals | 4300 gals | 4300 gals | 5100 gals | 5100 gals | 8000 gals |
| Tender Fuel Capacity (oil/coal) | 6 tons | 6 tons | 9 tons | 7.5 tons | 7.5 tons | 8 tons | 8 tons | 9 tons | 9 tons | 9 tons | 9 tons | 10 tons | 10 tons | 2661 gals |
| Minimum weight per yard of rail on which locomotive could run | 43.89 lb rail | 41.39 lb rail | 46.94 lb rail | 44.06 lb rail | 42.22 lb rail | 50.97 lb rail | 58.33 lb rail | 59.33 lb rail | 60.11 lb rail | 62.49 lb rail | 62.49 lb rail | 62.78 lb rail | 73.94 lb rail | 81.11 lb rail |
| Geometry Relating to Tractive Effort | ||||||||||||||
| Driver Diameter | 57" | 50" | 50" | 50" | 50" | 57" | 56" | 57" | 57" | 57" | 57" | 56" | 63" | 63" |
| Boiler Pressure | 140 psi | 140 psi | 150 psi | 145 psi | 140 psi | 160 psi | 174 psi | 174 psi | 180 psi | 190 psi | 190 psi | 190 psi | 200 psi | 210 psi |
| Cylinders (dia x stroke) | 18" x 24" | 18" x 24" | 19" x 24" | 19" x 22" | 19" x 22" | 19" x 24" | 19" x 24" | 19" x 24" | 19" x 26" | 19" x 26" | 19" x 26" | 19" x 26" | 20" x 28" | 20" x 28" |
| Tractive Effort | 16234 lbs | 18507 lbs | 22093 lbs | 19577 lbs | 18902 lbs | 20672 lbs | 22882 lbs | 22481 lbs | 25194 lbs | 26594 lbs | 26594 lbs | 27069 lbs | 30222 lbs | 31733 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.87 | 4.03 | 3.82 | 4.05 | 4.02 | 4.44 | 4.59 | 4.75 | 4.29 | 4.23 | 4.23 | 4.17 | 4.40 | 4.60 |
| Heating Ability | ||||||||||||||
| Firebox Area | 120 sq. ft | 110 sq. ft | 182 sq. ft | 110 sq. ft | 119 sq. ft | 135 sq. ft | 134.50 sq. ft | 132 sq. ft | 123 sq. ft | 128 sq. ft | 128 sq. ft | 142 sq. ft | 143 sq. ft | 143 sq. ft |
| Grate Area | 16 sq. ft | 14.90 sq. ft | 16.90 sq. ft | 22.60 sq. ft | 22 sq. ft | 22.90 sq. ft | 22.60 sq. ft | 23 sq. ft | 28.10 sq. ft | 28.10 sq. ft | 28.10 sq. ft | 28 sq. ft | 47 sq. ft | 46.20 sq. ft |
| Evaporative Heating Surface | 1104 | 1013 | 1622 | 1181 | 1070 | 1551 | 1492 | 1506 | 1511 | 1559 | 1785 | 1829 | 2268 | 1533 |
| Superheating Surface | 330 | |||||||||||||
| Combined Heating Surface | 1104 | 1013 | 1622 | 1181 | 1070 | 1551 | 1492 | 1506 | 1511 | 1559 | 1785 | 1829 | 2268 | 1863 |
| Evaporative Heating Surface/Cylinder Volume | 156.18 | 143.31 | 205.95 | 163.59 | 148.21 | 196.93 | 189.44 | 191.22 | 177.10 | 182.72 | 209.21 | 214.37 | 222.77 | 150.57 |
| Computations Relating to Power Output (More Information) | ||||||||||||||
| Robert LeMassena's Power Computation | 2240 | 2086 | 2535 | 3277 | 3080 | 3664 | 3932.40 | 4002 | 5058 | 5339 | 5339 | 5320 | 9400 | 9702 |
| Same as above plus superheater percentage | 2240 | 2086 | 2535 | 3277 | 3080 | 3664 | 3932.40 | 4002 | 5058 | 5339 | 5339 | 5320 | 9400 | 11420.55 |
| Same as above but substitute firebox area for grate area | 16800 | 15400 | 27300 | 15950 | 16660 | 21600 | 23403 | 22968 | 22140 | 24320 | 24320 | 26980 | 28600 | 35349.32 |
| Power L1 | 3206.19 | 2579.72 | 4018.64 | 2897.20 | 2690.64 | 4296.10 | 4463.23 | 4546.08 | 4260.91 | 4652.06 | 5130.18 | 5277.11 | 6152.88 | 11301.04 |
| Power MT | 268.42 | 229.02 | 314.54 | 241.63 | 234.15 | 309.69 | 281.13 | 281.53 | 260.45 | 273.52 | 301.63 | 308.87 | 305.74 | 511.94 |
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