IMG_2543.jpgOver the years, I have had the opportunity to operate on many fine model railroads, including...

  • Dave Abeles' Conrail Onondaga Cutoff
  • Chris Adams' New York, New Haven & Hartford
  • Bill Blackburn's Pennsylvania Railroad, Great Valley Division
  • Jim Clay's Pennsylvania Railroad, Cumberland Valley Branch (fallen flag)
  • Jim Dalberg's New Jersey Northern
  • Tony Koester's Nickel Plate Road
  • Steven Mallery's Pennsylvania Railroad, Buffalo Line
  • Bob Martin's Central Pennsylvania Railroad (fallen flag)
  • Larry Reynolds' Pennsylvania Railroad, Altoona Area
  • Dave Rohrbaugh's South Penn Railroad
  • Dave Trone's West Penn Railroad
  • Jeff Warner's PRR/RDG/WM South Central Region (fallen flag)
  • Bob Zeolla's Conrail Conemaugh Line



This table cross references Pennsy electric locomotives by class, type, sub class, sub class designator, year of introduction, and availability of HO scale models.

Eventually, clicking on minor class number will link to a class-specific page which will include prototype builder data, specifications, unit rosters, and unit photos.

Corrections and additions to this page are welcome. However, please refrain from submitting roster and subclass information for classes whose class detail pages have not yet been created. Thank you.

 30 ribbed single trlr proto1

Trailer Numbering

Early Trailer Numbering

The trailer number was broken into three parts. The first two digits indicated the trailer length. These two digits were followed by an alphabet letter (C, E, or W). The significance of the letter is unknown. The letter was followed by numbers indicating the trailer number. Thus trailer 32E250 is a 32’ trailer numbered 250.

f30d w trailer

The F30 were 50' flat cars and the predominant flat car class on the Pennsy roster during the 1950s.


The Pennsylvania Railroad was a pioneer in the development of trailer on flat car (TOFC) service and was the principal partner in the formation of Trailer Train Corporation.

prr alco s1

Alco S-1 and S-3, Class AS6

The ALCO S-1 and S-3 were 660 horsepower switcher diesel-electric locomotives produced by ALCO and their Canadian subsidiary Montreal Locomotive Works (MLW). The two locomotives differed only in trucks, with the S-1 using ALCO's own Blunt trucks, and the S-3 using AAR type A switcher trucks. The S-1 was built between April 1940 and June 1950, with a total of 543 completed, while the S-3 was constructed between February 1950 and November 1953 (MLW until 1957) with total sales of 300. 

PRR 6000 HP EP20 leaves UD with the Penn Texas

The Penn Texas was a named passenger train of the Pennsylvania Railroad that ran from New York City's Pennsylvania Station to St. Louis' Union Station from 1948 to 1970. The train also interchanged cars at Harrisburg, Pennsylvania with Washington, D.C., via York, Pennsylvania and Baltimore, Maryland.

X31a E9736 Side BillLaneBowser X31A

In the middle of the depression in 1934, the Pennsylvania began a massive car building program in it’s Altoona, PA shops. The round roof design was adopted to achieve the maximum cubic foot capacity loading and still clear tunnel restrictions, and the X31 series became their new and distinctive standard box car. Two basic roofs were adopted - one flush to the sides and the other with a 2” setback at the top of the roof. Cars were both 40‘ in length and came with either single or double doors with 6' and 12’-1-1/2” or 14‘-6” openings respectivly. During one period between March and April 1936, many of these cars were contracted out between builders AC&F, BSC, GATC, GSC and PSC. In 1939 and through 1940, the PRR modied the roofs of 690, 40’ double-door cars with a distinctive extended roof to accommodate jeep shipments. These were designated as X31F and classifed XAR.

7001LargeFunaro & Camerlengo X28A - Available with multiple brake and door configurations.

The PRR’s X28 boxcar was developed from a combination of the evolution of lessons learned with the X25 fleet and the ARA mandate for standardized single-sheathed 50 ton boxcars. The X28 was an automobile version of the ARA boxcar, although based on a PRR design. The first 1,000 cars of the 5,000 car fleet were equipped with corrugated Youngstown doors, with the remaining 4,000 equipped with three-panel car builder doors. The X28 fleet was built during 1924 and 1926. Following development of the X31 “wagontop” boxcar in 1933 by the PRR, the X28 Automobile version was deemed obsolete and a rebuild program from 7/1933 to 7/1935 removed the double door configuration to only a single door creating the X28a. Nearly the entire X28 fleet was converted to the X28a class. By 1955, 3,500 X28a remained and by 1968, only 8 were still on the roster. (Source:

8260LargeFunaro & Camerlengo X42

The X42 was created following WW2 when head-end mail and express traffic took off across the nation. For the PRR it was cheaper to build a boxcar with door spacing and dimensions similar to a B60 baggage car for bulk mail shipments. This unique boxcar was classed as an X42, and 10 of the 60' cars were built between August and September of 1950, series 2540-2549. Equipped with steam and signal lines like an express car, it was initially painted in the Circle Keystone Scheme used for freight. However, in a May 1951 paint & lettering diagram, the scheme was made obsolete when all X42 were repainted into a unique Tuscan Red Passenger scheme. The car sides and ends were painted Tuscan Red. The roof, underbody, and trucks were painted black. The side lettering was Gold Leaf and the end lettering was white. All 10 X42’s were later painted into the Shadow Keystone Scheme with some later receiving the Plain Keystone monogram as well. The entire fleet of 10 cars lasted into Penn Central. (Source: Mount Vernon Shops)

 55462Bowser X33

In 1932 the PRR designed boxcars that would be specifically used for the automobile industry. To maximize capacity they used a new unique roof design, where it curved at the edge, termed a “round roof” or “wagontop”. The X32 and X33 classes were both 50 '6" cars with staggered doors. The X33 differed from the X32 in that it also had end doors. Both X32 and X33 cars were built in 1933. Then, in 1936 after some design improvements, the X32a and X33a classes were constructed. The X33 class was specifically designed for carrying finished automobiles.

Although considered large capacity when first built in 1933, line side clearance improvements made the cars obsolete, so in 1959 the PRR stripped the superstructure of 1,000 X32 and X33 subclasses cars to build their X51 class of boxcars. By April of 1968, the PRR only had less than a dozen X32/X33 cars in revenue service. (Source:


The Track Segment series documents track segments as indicated in the CT1000 of 1945 in conjunction with the Employee Timetables of 1954. Where available, locations indicated may link to a corresponding On Location series article for more detailed information.

The On Location series takes a deep dive into a Pennsylvania Railroad location as indicated within the CT1000 - List of Stations and Sidings.

The Interchange series contains articles about railroads that interchanged with the Pennsy, including fleet statistics and paint schemes with era-appropriateness guidance.