Class D7 (formerly Class A (anthracite), pre-1895) on the Pennsylvania Railroad was a class of 4-4-0steam locomotive.[4] Fifty-eight were built by the PRR's Altoona Works (now owned by Norfolk Southern) between 1882–1891 with 68 in (1.73 m) drivers, while sixty-one of class D7a were constructed with 62 in (1.57 m) drivers.[1]
^Staufer, Alvin F. & Pennypacker, Bert (1962). Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900–1957. Staufer. LCCN 62020878.
^Warner, Paul T. (1924). Motive Power Development on the Pennsylvania railroad System. Philadelphia: Baldwin.
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November 23, 2023
pennsylvania, railroad, class, class, formerly, class, anthracite, 1895, pennsylvania, railroad, class, steam, locomotive, fifty, eight, were, built, altoona, works, owned, norfolk, southern, between, 1882, 1891, with, drivers, while, sixty, class, were, const. Class D7 formerly Class A anthracite pre 1895 on the Pennsylvania Railroad was a class of 4 4 0 steam locomotive 4 Fifty eight were built by the PRR s Altoona Works now owned by Norfolk Southern between 1882 1891 with 68 in 1 73 m drivers while sixty one of class D7a were constructed with 62 in 1 57 m drivers 1 Pennsylvania Railroad D7PRR D7a 953 in its builders portraitType and originPower typeSteamBuilderPRR Altoona Works 1 Build date1882 1891 1 Total produced58 D7 61 D7a 1 SpecificationsConfiguration Whyte4 4 0 UIC2 BGauge4 ft 8 1 2 in 1 435 mm Leading dia 30 in 762 mm D7 2 33 in 838 mm D7a 3 Driver dia 68 in 1 727 mm D7 2 62 in 1 575 mm D7a 3 Wheelbase22 ft 7 1 2 in 6 90 m 2 3 Length58 ft 0 6 in 17 69 m 3 Height14 ft 4 in 4 37 m 3 Axle load32 650 lb 14 8 tonnes 3 Adhesive weight56 700 lb 25 7 tonnes D7 2 58 700 lb 26 6 tonnes 3 Loco weight93 500 lb 42 4 tonnes D7 2 96 330 lb 43 7 tonnes D7a 3 Total weight160 880 lb 73 0 tonnes 3 Fuel typeAnthracite coal 1 Fuel capacity12 000 lb 5 4 tonnes 3 Water cap 2 400 US gal 9 100 L 2 000 imp gal 3 Firebox Firegrate area34 75 sq ft 3 23 m2 3 Boiler pressure140 lbf in2 970 kPa 3 Heating surface1 289 sq ft 119 75 m2 3 Tubes1 134 sq ft 105 35 m2 3 Firebox155 sq ft 14 40 m2 3 Cylinders2 3 Cylinder size17 in 24 in 432 mm 610 mm 3 Valve gearStephensonValve typeSlide valvesPerformance figuresTractive effort12 138 lbf 53 99 kN D7 13 313 lbf 59 22 kN D6a Factor of adh 4 7 D7 4 4 D7a The D7 was fundamentally an anthracite burning version of the PRR D6 with a larger fire grate in order to burn the slower burning harder coal 5 References edit a b c d e PRR Steam Roster Northeast Rails Retrieved 2007 12 31 a b c d e Pennsylvania Railroad D7 Diagram PRR Railfan net Retrieved 2008 08 17 a b c d e f g h i j k l m n o p q r Pennsylvania Railroad D7a Diagram PRR Railfan net Retrieved 2008 08 17 Staufer Alvin F amp Pennypacker Bert 1962 Pennsy Power Steam and Electric Locomotives of the Pennsylvania Railroad 1900 1957 Staufer LCCN 62020878 Warner Paul T 1924 Motive Power Development on the Pennsylvania railroad System Philadelphia Baldwin nbsp Wikimedia Commons has media related to Pennsylvania Railroad D7 Retrieved from https en wikipedia org w index php title Pennsylvania Railroad class D7 amp oldid 1126645624, wikipedia, wiki, book, books, library,
