Class D6 (formerly Class K, pre-1895) on the Pennsylvania Railroad was a class of 4-4-0steam locomotive.[3] Nineteen were built by the PRR's Altoona Works (now owned by Norfolk Southern) between 1881 and 1883. They were equipped with 78-inch (1,981 mm) drivers.[1] Seven were later converted to 72-inch (1,829 mm) drivers and classified D6a.[1]
The D6 was one of the first American 4-4-0s to place the firebox above, rather than between, the locomotive's frames.[4] This added about 8 inches to the possible width of the firebox, enabling a larger, easier to fire and more powerful locomotive; the maximum fire grate area increased to about 35 sq ft (3.25 m2) from the previous maximum of about 18 sq ft (1.67 m2).[5]
The innovation was not wholly new, having been first seen on the Philadelphia and Reading Railroad's 1859 Vera Cruz, designed by James Milholland of that road and built in their own shops; the Reading used this design until the invention of the Wootten firebox in 1877.[6] It was subsequently adopted by the Baldwin Locomotive Works in 1881 for six locomotives constructed for the Central Railroad of New Jersey; these were followed by the Pennsylvania Railroad locomotives, which garnered more attention for this design feature, in addition to having larger drivers than most previous 4-4-0s.
Referencesedit
^ abcde"PRR Steam Roster". Northeast Rails. Retrieved December 31, 2007.
^ abcdefghijklmnopPennsylvania Railroad. "D6 Diagram". PRR.Railfan.net. Retrieved December 31, 2007.
^ abStaufer, Alvin F. & Pennypacker, Bert (1962). Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900–1957. Staufer. LCCN 62020878.
^Gunsaulus, Frank W. (ed.) (1906). Modern Engineering Practice. American School of Correspondence. {{cite book}}: |author= has generic name (help)
^"Mechanical Stokers for Locomotives". Cassier's Magazine. Vol. XXXII, no. 1. New York: Cassier Magazine. May 1907. p. 75.
^Report of the Proceedings of the Nineteenth Annual Convention of the American Railway Master Mechanics' Association in Convention at Tremont Temple, Boston, Mass., June 15th, 16th and 18th, 1886. Cincinnati, Ohio: Aldine. 1886.
January 01, 1970
pennsylvania, railroad, class, class, formerly, class, 1895, pennsylvania, railroad, class, steam, locomotive, nineteen, were, built, altoona, works, owned, norfolk, southern, between, 1881, 1883, they, were, equipped, with, inch, drivers, seven, were, later, . Class D6 formerly Class K pre 1895 on the Pennsylvania Railroad was a class of 4 4 0 steam locomotive 3 Nineteen were built by the PRR s Altoona Works now owned by Norfolk Southern between 1881 and 1883 They were equipped with 78 inch 1 981 mm drivers 1 Seven were later converted to 72 inch 1 829 mm drivers and classified D6a 1 Pennsylvania Railroad D6PRR D6 317 in its builders portraitType and originPower typeSteamDesignerTheodore N ElyBuilderPRR Altoona Works 1 Build date1881 1883 1 Total produced19 1 SpecificationsConfiguration Whyte4 4 0 UIC2 BGauge4 ft 8 1 2 in 1 435 mm Leading dia 33 in 838 mm 2 Driver dia 78 in 1 981 mm 2 Wheelbase22 ft 8 1 2 in 6 92 m 2 Length58 ft 0 3 in 17 69 m 2 Height15 ft 0 in 4 57 m 2 Axle load32 900 lb 14 9 tonnes 2 Adhesive weight58 800 lb 26 7 tonnes 2 Loco weight96 700 lb 43 9 tonnes 2 Total weight153 000 lb 69 4 tonnes 2 Fuel typeSoft coalFuel capacity12 000 lb 5 4 tonnes 2 Water cap 2 400 US gal 9 100 L 2 000 imp gal 2 Firebox Grate area34 76 sq ft 3 23 m2 2 Boiler pressure140 lbf in2 970 kPa 2 Heating surface Firebox155 sq ft 14 40 m2 2 Tubes1 085 sq ft 100 80 m2 2 Total surface1 240 sq ft 115 20 m2 2 Cylinders2Cylinder size18 in 24 in 460 mm 610 mm 3 Valve gearStephensonPerformance figuresTractive effort11 170 lbf 49 69 kN D6 12 800 lbf 56 94 kN D6a Factor of adh 5 3 D6 4 6 D6a The D6 was one of the first American 4 4 0s to place the firebox above rather than between the locomotive s frames 4 This added about 8 inches to the possible width of the firebox enabling a larger easier to fire and more powerful locomotive the maximum fire grate area increased to about 35 sq ft 3 25 m2 from the previous maximum of about 18 sq ft 1 67 m2 5 The innovation was not wholly new having been first seen on the Philadelphia and Reading Railroad s 1859 Vera Cruz designed by James Milholland of that road and built in their own shops the Reading used this design until the invention of the Wootten firebox in 1877 6 It was subsequently adopted by the Baldwin Locomotive Works in 1881 for six locomotives constructed for the Central Railroad of New Jersey these were followed by the Pennsylvania Railroad locomotives which garnered more attention for this design feature in addition to having larger drivers than most previous 4 4 0s References edit a b c d e PRR Steam Roster Northeast Rails Retrieved December 31 2007 a b c d e f g h i j k l m n o p Pennsylvania Railroad D6 Diagram PRR Railfan net Retrieved December 31 2007 a b Staufer Alvin F amp Pennypacker Bert 1962 Pennsy Power Steam and Electric Locomotives of the Pennsylvania Railroad 1900 1957 Staufer LCCN 62020878 Gunsaulus Frank W ed 1906 Modern Engineering Practice American School of Correspondence a href Template Cite book html title Template Cite book cite book a author has generic name help Mechanical Stokers for Locomotives Cassier s Magazine Vol XXXII no 1 New York Cassier Magazine May 1907 p 75 Report of the Proceedings of the Nineteenth Annual Convention of the American Railway Master Mechanics Association in Convention at Tremont Temple Boston Mass June 15th 16th and 18th 1886 Cincinnati Ohio Aldine 1886 Retrieved from https en wikipedia org w index php title Pennsylvania Railroad class D6 amp oldid 1211382208, wikipedia, wiki, book, books, library,
