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- PRR_I1s abstract "The Pennsylvania Railroad's class I1s steam locomotives were the largest class of 2-10-0 "Decapods" in the United States, with 598 built 1916–1923 (Altoona: 123, Baldwin: 475). They were the dominant freight locomotive on the system until World War II, and they remained in service until the end of PRR steam in 1957. Nicknames for the type included Decs and Hippos, the latter due to the large boiler. Unlike smaller 2-10-0s that preceded them, the I1s design was huge, taking advantage of the PRR's heavy trackage and high allowed axle load, with a wide, free-steaming boiler. Large cylinders enabled the I1s to apply that power to the rails. Their power was undeniable, but they were not popular with the crews, for they were hard riding at all but low speeds. One author described them as the holy terror of the PRR. The large boiler limited the size of the driving wheels, which made it impossible to mount counterweights large enough to balance the piston thrusts. Their factor of adhesion is low, so they were prone to slipping.Subclass I1sa increased maximum steam cut-off to admit steam for 78% of the piston stroke (rather than the original 50%), boosting low speed tractive effort from 90,000 to 96,000 pounds-force (400 to 430 kN). There was no obvious external difference except for a revised builders' plate (and of course the revised combination lever). I1s locomotives were converted to I1sa during major overhaul; eventually 489 were converted while 109 remained as built.In 1923 PRR put engine 4358 on the Altoona test plant. The tests below were all stoker fired. In two hours at 7.12 miles per hour (11.46 km/h) it consumed 8,129 pounds (3,687 kg) of coal (13,398 BTU/lb or 5,760 kJ/kg) and averaged 71,993 pounds (32,655 kg) of tractive effort at the driver rims, corresponding to 6.4% thermal efficiency. In one hour at 14.24 miles per hour (22.92 km/h) it consumed 6,809 pounds (3,089 kg) of coal (12,682 BTU/lb or 5,452 kJ/kg) and averaged 63,263 pounds (28,696 kg) tractive effort, or 7.1% efficiency. At 22.02 miles per hour (35.44 km/h) (40% cutoff, so not a maximum effort) it consumed 7,000 lb/h (3,200 kg/h) of 13,039 BTU/lb (5,606 kJ/kg) coal and averaged 43,515 pounds (19,738 kg) TE, for 7.1% efficiency. At 21.36 miles per hour (34.38 km/h) at 50% cutoff it consumed 5,230 pounds (2,370 kg) of 13,372 BTU/lb (5,749 kJ/kg) coal in 30 minutes averaging 51,409 pounds (23,319 kg) TE, for an efficiency of just under 5.4%.".
- PRR_I1s activeYearsEndYear "1923".
- PRR_I1s activeYearsStartYear "1916".
- PRR_I1s builder Baldwin_Locomotive_Works.
- PRR_I1s cylinderCount "2".
- PRR_I1s numberBuilt "598".
- PRR_I1s thumbnail PRR-I1s-OWI.jpg?width=300.
- PRR_I1s wikiPageExternalLink PRRdiagrams.html?diag=I1s-52595.gif.
- PRR_I1s wikiPageExternalLink projectFiles.php?projectStringData=picdir%3DI1articlephotos%26picidx%3D0%26lastpic%3D20%26picstyle%3D0%26.
- PRR_I1s wikiPageExternalLink 4483Frame1Source1.htm.
- PRR_I1s wikiPageExternalLink old4483.htm.
- PRR_I1s wikiPageID "1144350".
- PRR_I1s wikiPageLength "4759".
- PRR_I1s wikiPageOutDegree "30".
- PRR_I1s wikiPageRevisionID "674265015".
- PRR_I1s wikiPageWikiLink 2-10-0.
- PRR_I1s wikiPageWikiLink Altoona_Works.
- PRR_I1s wikiPageWikiLink Axle_load.
- PRR_I1s wikiPageWikiLink Baldwin_Locomotive_Works.
- PRR_I1s wikiPageWikiLink Bore_(engine).
- PRR_I1s wikiPageWikiLink Category:2-10-0_locomotives.
- PRR_I1s wikiPageWikiLink Category:Baldwin_locomotives.
- PRR_I1s wikiPageWikiLink Category:Freight_locomotives.
- PRR_I1s wikiPageWikiLink Category:Pennsylvania_Railroad_locomotives.
- PRR_I1s wikiPageWikiLink Category:Railway_locomotives_introduced_in_1916.
- PRR_I1s wikiPageWikiLink Category:Standard_gauge_railway_locomotives.
- PRR_I1s wikiPageWikiLink Category:Steam_locomotives_of_the_United_States.
- PRR_I1s wikiPageWikiLink Cleveland.
- PRR_I1s wikiPageWikiLink Cleveland,_Ohio.
- PRR_I1s wikiPageWikiLink Coal.
- PRR_I1s wikiPageWikiLink Counterweight.
- PRR_I1s wikiPageWikiLink Dock_(maritime).
- PRR_I1s wikiPageWikiLink Hamburg_(village),_New_York.
- PRR_I1s wikiPageWikiLink Iron_ore.
- PRR_I1s wikiPageWikiLink Mechanical_stoker.
- PRR_I1s wikiPageWikiLink Pennsylvania_Railroad.
- PRR_I1s wikiPageWikiLink Steam_locomotive.
- PRR_I1s wikiPageWikiLink Stroke_(engine).
- PRR_I1s wikiPageWikiLink Thermal_efficiency.
- PRR_I1s wikiPageWikiLink Tractive_effort.
- PRR_I1s wikiPageWikiLink United_States.
- PRR_I1s wikiPageWikiLink Worthington_Corporation.
- PRR_I1s wikiPageWikiLinkText "I1s".
- PRR_I1s wikiPageWikiLinkText "I1s/I1sa".
- PRR_I1s wikiPageWikiLinkText "PRR I1s".
- PRR_I1s builddate "1916".
- PRR_I1s builder "Pennsylvania Railroad's Altoona Shops ; Baldwin Locomotive Works".
- PRR_I1s caption "1.0".
- PRR_I1s cylindercount "2".
- PRR_I1s cylindersize "bore × stroke".
- PRR_I1s feedwaterheater "Worthington BL".
- PRR_I1s hasPhotoCollection PRR_I1s.
- PRR_I1s name "1.0".
- PRR_I1s operator Pennsylvania_Railroad.
- PRR_I1s powertype "steam".
- PRR_I1s preservedunits "One - #4483".
- PRR_I1s totalproduction "598".
- PRR_I1s tractiveeffort "I1sa—".
- PRR_I1s tractiveeffort "I1s—".
- PRR_I1s whytetype "2".
- PRR_I1s wikiPageUsesTemplate Template:Commons_category.
- PRR_I1s wikiPageUsesTemplate Template:Convert.
- PRR_I1s wikiPageUsesTemplate Template:Gallery.
- PRR_I1s wikiPageUsesTemplate Template:Infobox_locomotive.
- PRR_I1s wikiPageUsesTemplate Template:PRR_locomotives.
- PRR_I1s subject Category:2-10-0_locomotives.
- PRR_I1s subject Category:Baldwin_locomotives.
- PRR_I1s subject Category:Freight_locomotives.
- PRR_I1s subject Category:Pennsylvania_Railroad_locomotives.
- PRR_I1s subject Category:Railway_locomotives_introduced_in_1916.
- PRR_I1s subject Category:Standard_gauge_railway_locomotives.
- PRR_I1s subject Category:Steam_locomotives_of_the_United_States.
- PRR_I1s hypernym Class.
- PRR_I1s type Locomotive.
- PRR_I1s type MeanOfTransportation.
- PRR_I1s type Locomotive.
- PRR_I1s type Product.
- PRR_I1s type DesignedArtifact.
- PRR_I1s type Thing.
- PRR_I1s type Q93301.
- PRR_I1s comment "The Pennsylvania Railroad's class I1s steam locomotives were the largest class of 2-10-0 "Decapods" in the United States, with 598 built 1916–1923 (Altoona: 123, Baldwin: 475). They were the dominant freight locomotive on the system until World War II, and they remained in service until the end of PRR steam in 1957. Nicknames for the type included Decs and Hippos, the latter due to the large boiler.".
- PRR_I1s label "PRR I1s".
- PRR_I1s sameAs m.04b33l.
- PRR_I1s sameAs Q7120491.
- PRR_I1s sameAs Q7120491.
- PRR_I1s wasDerivedFrom PRR_I1s?oldid=674265015.
- PRR_I1s depiction PRR-I1s-OWI.jpg.
- PRR_I1s isPrimaryTopicOf PRR_I1s.
- PRR_I1s name "Pennsylvania Railroad I1s".