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PRR Locomotive Drawings at the Pennsylvania State Archives

OBTAINING COPIES OF PRR (Pennsylvania Railroad Company) MECHANICAL ENGINEERING DRAWINGS FOR A PARTICULAR LOCOMOTIVE OR PIECE OF ROLLING STOCK

1. Determining Which Drawing Numbers You Want:

The Pennsylvania State Archives holds a fairly complete collection of PRR Mechanical Engineering Drawings, (ca. 1875-1960. (596 cu. ft.) {#286m.361}. However, to access these drawings, which are grouped by size and then arranged numerically by drawing number, you first need to know the class of your locomotive or car to figure out what drawings pertain. Several methods exist for determining class, the most effective of which is doing or requesting a search in the Railroad Tracing Index (RTI) Database.

  1. Railroad Tracing Index (RTI) Database
  2. Most of the PRR Mechanical Engineering Drawings that are in our posession are indexed by class in a Microsoft Access database known as RTI (Railroad Tracing Index). Included are all of the A, B and C size drawings (the largest drawing sizes), some of the D and F sizes, but few, if any, of the E's. Also, any drawings on microfilm that we do not have original linens or blueprints for are not currently represented in RTI.

    The most efficient way to access drawings via the database is to send us the appropriate standard search fee (in a check or money order made out to "Commonwealth of Pennsylvania" and mailed to "Railroad Archivist, Pennsylvania State Archives, 350 North St., Harrisburg, PA 17120-0090"). Specify the class or classes you want us to search. The standard search fee applies to one class (GG1, for example) or one contiguous range of classes (K4 through K4SB) only. Additional, non-contiguous classes will require additional search fees. We can mail you the results in the form of a printout, or email them in a Word or rich text format. In the result report you can read detailed descriptions of each drawing, and choose which ones you would like copied.

    The RTI database can also be utilized in person by researchers visiting our search room, or a copy of the entire database can be purchased on CD for the standard file-and-disc fee (plus postage and handling) and mailed to you. It is too large to send as an email attachment.

  3. Index to Mechanical Engineering Drawings, {series #286m.360}
  4. If you do not find the drawings you are looking for in RTI you can try using this original manual card index created by the PRR. The index cards are grouped by class, and contain descriptions of parts and corresponding drawing numbers. Consult the finding aid for the index cards to determine whether your class is represented, and if so, what drawer it is in. Be aware that some of the drawers and cards are missing, and some of the drawings indexed may be ones we never received.

  5. Microfilm of the Index to Mechanical Engineering Drawings, {series #286m.360} (rolls #RRV 1149-1201)

    The card index described above, Index to Mechanical Engineering Drawings, {series #286m.360} , is also partially available on microfilm that the PRR filmed in a class by class fashion. Unfortunately, the film may not be complete. It is available for viewing in the Archives microfilm reading room during regular hours, as well as on Saturdays.

  6. Lists of Tracings, ca. 1909-1959 (a subseries of the Mechanical Engineering Drawings, ca 1875-1960. (596 cu. ft.) {#286m.361}

    For some classes, we hold special booklets called Lists of Tracings. Made of the same starched linen as the Mechanical Engineering Drawings, these booklets conveniently list all the tracings, in chart form and described by part, for particular classes. Below are tables that represent all "F-size" class drawings that have been copied into notebooks in the State Archives search room for research convenience. After these tables are further class listings for larger sized tracings.

    Coaches
    Tracing No.
    Issue Date
    Class/Description
    F27764 3-18-07 P58
    F423624 3-26-41 P70fcr
    F410382 1-5-37 P70gr; P70gsr (Built before 6-1-41)
    F424604 9-4-41 P70gsr (Built after 6-1-41)
    F412559 10-28-37 P70h; P70hr
    F419521 6-12-40 P70kr
    n/a n/a P70r (A/C System. Car #3756)
    F455268 1-25-55 P85b (Car #4068 thru 4088)

    Passenger Baggage Cars
    Tracing No.
    Issue Date
    Class/Description
    n/a n/a PB70 (1925 Program)
    F79610 1-28-26 PB70
    F410333 1-5-37 PB70dr
    F424607 9-4-41 PB70dr (Built after 6-1-41)
    F422985 12-5-40 PB70er

    Passenger Baggage Mail Cars
    Tracing No.
    Issue Date
    Class/Description
    n/a n/a PBM70a (1925 Program)
    F79611 1-28-26 PBM70a

    Dining Cars
    Tracing No.
    Issue Date
    Class/Description
    F419480 6-4-40 D70asr
    F413176 2-2-38 D70br
    F424680 9-13-41 D70cr (Built after 1-1-41. Car #4690, 4692, 4694, 4696; 4698)
    F424681 9-13-41 D70dr (Built after 1-1-41. Car #4689, 4691; 4693)
    F424682 9-13-41 D70er (Built after 1-1-41. Car #4695 & 4697)
    F99269 5-12-32 D78, D78b; D78c (A/C System)
    F97477 10-30-31 D78r (A/C System. Car #4493 & 7941)
    F97269 10-2-31 D78br (A/C System. Car #7953, 7954, 7957; 7958)
    F79612 1-28-26 D78b
    F89712 9-29-29 D78c
    F445967 9-14-50 D78dr (Clerestory roof)
    F445973 9-18-50 D78dr (Round roof)
    F448808 3-20-52 D78ed
    F455580 4-19-55 D82 (Car #4500 and 4501)
    F449318 1-17-52 D82a
    F449536 6-6-52 DL85d (Car #4625 & 4627)

    Multiple Unit Cars
    Tracing No.
    Issue Date
    Class/Description
    F55663 2-19-17 Truck Class 10 & 10m
    F60054 10-3-18 MP38
    F73129 7-31-23 MP38a
    F34045 10-15-09 MP54
    F410520 2-1-37 MP70
    F440150 5-21-48 MP70b
    n/a n/a MP71
    F98407 3-17-32 T62
    F410521 2-1-37 T70

    Baggage Cars
    Tracing No.
    Issue Date
    Class/Description
    F84650 2-6-28 B74b

    Baggage Mail Cars
    Tracing No.
    Issue Date
    Class/Description
    n/a n/a BM701 (1925 Program)
    F79609 1-28-26 BM701
    F465103 6-3-70 BM70k

    Dormitory Baggage Cars
    Tracing No.
    Issue Date
    Class/Description
    F423626 3-26-41 PDB70r (Built before 6-1-41)
    F424606 9-4-41 PDB70r (Built after 6-1-41)
    F455363 3-4-55 PDB85 (Car #6700)

    Mail Cars
    Tracing No.
    Issue Date
    Class/Description
    F406675 8-8-35 M70b

    Lounge & Café Cars
    Tracing No.
    Issue Date
    Class/Description
    F89713 9-19-29 PC70b
    F455403 3-22-55 PLC70a (Car #3612)
    F423625 3-26-41 PLC70r

    Sleeping Cars
    Tracing No.
    Issue Date
    Class/Description
    F455190 12-31-54 PS131 (Car #8411 to 8418)
    F455191 12-31-54 POS21 (Car #8419 & 8420)
    F455266 1-25-55 PS21a (Car #8291 to 8297)
    F456635 3-22-56 PS21c (Car #8298 & 8299)
    F455262 1-25-55 PS214 (Car #8359 & 8360)

    Observation Cars
    Tracing No.
    Issue Date
    Class/Description
    F419446 5-28-40 POC70r
    F455329 2-17-55 POC85 (Car #1126)

    Business and Special Cars
    Tracing No.
    Issue Date
    Class/Description
    F86314 9-13-28 Z62; Z68
    F464918 12-8-69 Z74b (Car #90)
    F464914 12-8-69 Z74c (Car #180)
    F82978 5-6-27 Z74d (Car #100, 7504, 7505, 7507, 7509; 7510)
    F464911 12-8-69 Z74d (Car #7504)
    F85874 7-25-28 Z74e (Car #7511)
    n/a n/a Lunch counter car, Pay car, Agriculture & Dairy exhibit cars; car #90 - 180 - 4301 - 7508.

    Flat Cars
    Tracing No.
    Issue Date
    Class/Description
    F17306 3-27-02 FM
    F41589 5-24-12 F22
    F51662 10-11-15 F25, F25a; F25b
    F61243 3-7-19 F26
    F60276 11-2-18 F27
    F83055 5-17-27 F29
    F88786 6-10-29 F30
    F89620 9-4-29 F31
    F415537 8-15-38 F33
    F415539 8-19-38 F34
    F419617 7-5-40 F35
    F419871 8-21-40 F36

    Gondolas
    Tracing No.
    Issue Date
    Class/Description
    F26659 10-6-09 GRA
    F66385 12-24-20 GS, GSA, GSC; GSD
    F50305 4-16-15 G22
    F52104 12-15-15 G22a
    F60804 1-14-19 G23
    F92669 7-3-30 G26
    F427913 1-18-43 G30
    G73475 9-24-23 GP
    F71963 3-27-23 GPa

    Hoppers
    Tracing No.
    Issue Date
    Class/Description
    F83627 9-11-27 GLA
    F75435 5-23-24 GLB
    F83585 8-2-27 GLC
    F87159 12-21-28 GLD
    F88250 4-19-29 GLD (Replaced F87159)
    F97768 12-2-31 GLE
    F53326 4-14-16 H24
    F58121 2-5-18 H25
    F85983 8-3-28 H25 (Replaced F58121)
    F60700 1-2-19 H26
    F90611 12-31-29 H27
    F406149 4-23-36 H30
    F426598 6-20-42 H31b
    F457560 2-11-57 H36
    F460842 1-12-60 H39; H39a

    Stock Cars
    Tracing No.
    Issue Date
    Class/Description
    F66488 12-29-20 KF, KFa
    F66845 2-18-21 KY

    Reefers
    Tracing No.
    Issue Date
    Class/Description
    F71186 11-22-22 K8
    F40973 3-13-12 R7
    F59695 8-7-18 R8
    F58843 4-25-18 R8a
    F69752 4-28-22 R9
    F85732 7-2-28 R50b

    Tank Cars
    Tracing No.
    Issue Date
    Class/Description
    F90183 11-11-29 TM8; TM10

    Box Cars
    Tracing No.
    Issue Date
    Class/Description
    F38424 5-22-11 XLc
    F43130 11-11-12 X23
    F45353 8-9-13 X25
    F63843 2-18-20 X26; X26a
    F73586 11-8-23 X29
    F402092 3-6-34 X29 (Replaced F73586)
    F400147 1-12-33 X31; X31f
    F401960 2-1-34 X31a
    F400499 3-21-33 X32
    F400831 6-13-33 X33
    F463776 n/a X61, X61a, X61b, X61c; X61d

    Cabin Cars
    Tracing No.
    Issue Date
    Class/Description
    F429316 9-9-43 ND
    F48590 8-25-14 NDa
    F65152 7-24-20 NE; NEa
    F47140 3-13-14 N5
    F425801 2-20-42 N5 (Replaced F47140)
    F422667 10-24-40 N5b
    F425051 11-4-41 N5c
    F445573 7-25-50 N8
    F65227 8-5-20 N6a; N6b
    F425802 2-20-42 N6a; N6b (Replaced F65227)

    Narrow Gauge
    Tracing No.
    Issue Date
    Class/Description
    F75883 7-25-24 Narrow gauge equipment (W&W; OR&W)

    Dynamometer & Clearance
    Tracing No.
    Issue Date
    Class/Description
    F63602 1-20-20 Dynamometer car #2
    F425218 11-25-41 Dynamometer car #2 (Car #495591)
    F78728 9-10-25 Clearance car #2

    Maint. of Way & Wrecking Equipment
    Tracing No.
    Issue Date
    Class/Description
    F424826 10-2-41 Ballast spreader/snow flanger (former class XL).
    F416476 12-29-38 Rail grinding car (car #499201 to 499215).
    F416477 12-29-38 Rail grinding car trailer (car #499208 to 499215).
    F410013 11-7-36 Power car (car #499200).
    F417360 6-15-39

    Power car (car #499200. Replaced F410013.)

    F93738 n/a Tower car (former class GM 68).
    F417204 5-5-39 Wrecking equipment.
    F62830 10-23-19 Wrecking cranes.
    F44400 4-4-13 S5
    F64827 6-15-20 U5
    F53924 6-22-16 Y5
    F57263 10-17-17 Y7

    Misc.
    Tracing No.
    Issue Date
    Class/Description
    n/a n/a 2D-F12
    F44909 6-3-13 Motor truck scale (50,000 lb. capacity).
    F409239 7-14-36 Motor truck scale (50,000 lb. capacity).
    F56342 5-5-17 Motor truck scale (200,000 lb. capacity).
    F98340 3-9-32 Ice cart.
    F58584 n/a 10' overhead watering system.
    F39877 10-30-11 Passenger car axle generator systems.

    Tenders
    Tracing No.
    Issue Date
    Class/Description
    F16163 8-30-01 5500 gal. straight & sloping. 54.5", 58"; 66" deck.
    F15774 6-10-01 6000 gal. 50", 54.5", 58"; 66" deck.
    F16125 8-21-01 7000 gal. 58" & 66" deck.
    F34755 1-29-10 7000 gal. 82 1/4" deck. Built with M1 #4700.
    F34755 1-29-10 7000 gal. 82 1/4" deck. For G5s built in 1923.
    n/a n/a 70P82. For G5s built in 1924.
    F312680 3-15-17 90P84 (Formerly class 7E).
    n/a n/a 110P82
    n/a n/a 110P82a. For L.I.R.R. G5s.

    Steam Locomotives
    Tracing No.
    Issue Date
    Class/Description
    F59262 6-21-18 Safety valves
    F416790 2-23-39 Injectors
    F16742 12-24-01 E1a (#269)
    F212903 4-1-18 E2, E2a, E2b; E2c
    F312942 5-14-18 E7s; E7sa
    F16713 12-18-01 F3a
    F16509 11-8-08 F3b; F3c
    F64049 2-28-20 G5s
    n/a n/a G5s built 1924
    F212907 1-1-18 H6a, H6b; H6sb
    F21538 3-31-04 H7
    F211904 3-29-16 L1s
    F46849 n/a M1 (#4700)

    1. Locomotives :
      1. shelf GF-9000-3:  #74621-D of 10/10/1923 (2 binders, 1 loose pile)
        Consists of 2 binders of linen tracings labeled #2473 and #2474. Despite the “D” portion of the tracing number, the linens are actually “E” size  Locomotive classes represented are: A5s,  B6SB,  B8,  B8A,  C1,  E6S,  G5S,  H6SB,  H9S,  H10S,  I1S, I1SA,  K2SA,  K3S,  K4S,  K5,  L1S,  M1,  M1A,  and N1S (The loose blueprints in the pile are duplicates of the linens in the binders.)                       
      2. shelf GF-9000-3:  #79090-D of 11/9/1925   (1 cover sheet only)
        Apparently, this used to be a set of tracings similar to those of #73262-D. However, we currently have only the cover sheet  There are no lists of tracings inside  (Listed on the cover sheet are the following locomotive classes, for which we currrently have NO lists of tracings: A4,  B6,  B6S,  B6SA,  B28S,  CC2S,  D16D,  D16B,  D16SB,  E2,  E2A, E2B,  E2C,  E2D,  E2SD,  E3,  E3A,  E3SA,  E3SD,  E5S,  E7S,  E7SA, H6A,  H6SA,  H6B,  H8,  H8A,  H8S,  H8SA,  H8B,  H8SB,  H8C, H8SC,  K2S,  K2SB,  L2S,  N2S,  and N2SA.)
    2. Tenders :
      1. GF-9000-11:   #79091 of 11/9/1925   (1 loose pile of blueprints with a linen coversheet)
    3. Passenger Cars
      1. GF-9000-10:   #74322-E of 1/3/1924   (1 booklet of linens)
        This list of tracings represents the more common Passenger Car classes.  
      2. GF-9000-10:   #55688-E of July, 1922   (1 booklet of linens)
        This list of tracings was superceded by #74322-E, above.          
      3. GF-9000-10:   #27764-A of 3/19/1907   (1 reader-printer-copied booklet)
        List of Tracings for class P58, Lines East & West of Pittsburgh, copied off of  roll #24 of the PRR Microfilm Series entitled “Supervisor of Motive Power Expenditures, VARIOUS SERIES.”   
      4. GF-9000-10:   #437742-B of 5/13/1947   (1 rolled copy of a tracing)
        Passenger Cars - Trucks - Classification Chart  
      5. GF-9000-10:  Also on the “Passenger Car” shelf, although not Lists of Tracings
        per se, are the following photocopies of documentation relating to passenger cars:
        1. Specifications for Passenger Cars built by the PRR by the Edward G. Budd Manufacturing Co., [ca. 1940]       
        2. Letter, 4/2/1926, from M.E. McDonnell, Chief Chemist, to J.T. Wallis, Chief of Motive Power, describing the paint colors used on Passenger Equipment.
        3. List of Acceptable Manufacturers or Brands of Paint Material for Passenger Equipment, 1925 Program.
    4. Cabooses
      1. GF-9000-9:  (Caboose Directory for the Penn Central Transportation Company, 5/3/1974,  1 booklet of photocopies - mentioned here as a courtesy. Not technically part of the PRR series “Lists of Tracings.”)
    5. Various Experimentals
      1. GF-9000-9: No number,  E size, [ca. 1913-1959 (bulk: 1940-1959)]  (1 linen booklet)

  7. What to Do if You Don't Know the Class of your Locomotive or Car
  • Consult this chart (PDF, 62 K) giving "nicknames" and wheel configurations for many PRR Locomotive classes.
  • Consult published books and articles, or rail-related websites relating to PRR locomotives and rolling stock.
  • Consult one or more of the following series, most of which are arranged by some value OTHER than class (equipment type, railroad line, serial number, etc.), and then GIVE the class as part of a normal entry. Other series in the list offer other types of data (serial number, railroad line, etc.) which could then be used to find the class in another record series:
    • Arranged by equipment type, then year - Classification and Ownership Books, 1941-1971. (2 cu. ft.)  {#286m.271}
    • Arranged by car descriptions, then date - Cost of New Cars Record, ca 1890-1900. (.09 cu. ft.)  {#286m.282}
    • Arranged by car classes - Equipment Record: Lines West of Pittsburgh, ca 1900-1906. (.71 cu. ft.)  {#286m.289}
    • Arranged by railroad, then equipment type, then class - Equipment Valuation Books (MP 374), ca 1916-1968. (11 cu. ft.) {#286m.294}
    • Arranged randomly by equipment type and account number - Equipment Valuation Forms: Order No. 8, 1899-1920 (1915-1919). (5 cu. ft.)  {#286m.297}
    • Arranged by railroad line, then car types and serial numbers - Freight Equip. Construction and Repair Rec.: Terra Ht and Indiana RWY, 1890-1898. (.9 cu. ft.)  {#286m.302}
    • Arranged numerically, then assigned car number - Historical Record Cards for Retired Freight Cars (MP 12A), 1950-1967. (21.33 cu. ft.) {#286m.304}
    • Arranged numerically, then assigned car number - Historical Record Cards for Retired Passenger Cars (MP 12A), 1927-1955. (2 cu. ft.) {#286m.305}
    • Arranged numerically by assigned locomotive number - Historical Record Cards for Retired Steam Locos. (MP 12A), 1925-1937. (2.8 cu. ft.)  {#286m.306}
    • Arranged numerically by assigned locomotive number - Historical Record Cards for Retired Steam Locos. (MP 12A), 1938-1959. (4 cu. ft.)  {#286m.307}
    • Arranged numerically by assigned tender number - Historical Record Cards for Retired Steam Loco. Tenders (MP 12A),1937-1959. (3 cu. ft.) {#286m.308}
    • Arranged by car class and railroad name - Historical Record Forms for New Freight Cars (IT 210), 1919-1920. (3 cu. ft.)  {#286m.309}
    • Arranged numerically by car number, then company name and equipment type - Lines East Age Books (MP 308), ca 1900-1917. (11.9 cu. ft.)  {#286m.313}
    • Arranged numerically by card number, then company name and equipment type - Lines West Historical Books: Freight Car Equipment, 1900-1920. (5.16 cu. ft.)  {#286m.314}
    • Arranged numerically by locomotive unit number - Monthly Locomotive Inspection and Repair Reports, 1959-1963. (3 cu. ft.)  {#286m.317}
    • Arranged by car serial number - Original Desc. Book Rec. of Western NY and PA. RWY Freight Cars, 1900-1901. (1.25 cu. ft.)  {#286m.322}
    • Arranged by car numbers, then company/equipment type - Passenger Car Record Books: Lines East, ca 1895-1915. (5.28 cu. ft.) {#286m.323}
    • Arranged by car numbers, then company/equipment type - Passenger Car Record Books: Lines West, ca 1895-1915. (2.88 cu. ft.)  {#286m.324}
    • Arranged by railroad line, then serial number and car classes - Record of Car Equipment: South West System, ca 1885-1893. (.9 cu. ft.)  {#286m.327}
    • Arranged by railroad lines, then car classes and serial numbers - Record of Cars (MP 204), [ca 1890-1900]. (.23 cu. ft.)  {#286m.328}
    • Arranged by railroad company, then equipment number - Record of Class and Date Built: Lines West Freight Cars, [ca. 1900]. (.13 cu. ft.)  {#286m.331}
    • Arranged by railroad lines, then equipment serial number - Record of Classification of Passenger Cars [Steel Cars], undated. (.37 cu. ft.)  {#286m.332}
    • Arranged by railroad line, then car classes and serial numbers - Record of Freight Equipment: Terre Haute and Indianapolis RR, ca 1900-1907. (1.36 cu. ft.) {#286m.336}
    • Arranged by serial number of car - Record of Light Weight Freight Cars: Pennsylvania Company, ca 1900-1908. (.26 cu. ft.)  {#286m.337}
    • Arranged by equipment number - Record of Rolling Stock of the Terre Haute and Peoria RR, 1890-1896. (.04 cu. ft.)  {#286m.342}
    • Arranged by tank car number - Record of Tanks [Book 100], ca 1900-1905. (.1 cu. ft.)  {#286m.343}
    • Arranged by car class, then date - Register of New Cars, 1883-1914. (.1 cu. ft.)  {#286m.344}
    • Arranged by car number - Renumbered Freight Record Cards, 1917-1926. (8.3 cu. ft.)  {#286m.345}
    • Arranged by name of company, then old equipment numbers - Renumbering Plans for Car Equipment, 1884-1900. (.02 cu. ft.)  {#286m.346}
    • Arranged by month and year - Report of Condition and Assignment of Locomotives (MP 11A), 1920-1955. (.75 cu. ft.)  {#286m.347}
    • Arranged by equipment classes, then locomotive or car number - Statement showing Disposition of Equip. of the United N.J. RR and Canal Co., 1884. (.02 cu. ft.)  {#286m.351}
    • Arranged by old equipment numbers - Statements regarding Coke Gondolas Purchased from Pa. and North Western RR, 1895. (.01 cu. ft.)  {#286m.352}
    • Arranged by rail line and equipment type, then car serial numbers - Statements showing Empire and Green Lines Freight Cars, 1865-1877. (.01 cu. ft.)  {#286m.353} Coke Gondolas
    • Miscellaneous Motive Power Blueprints and Related Materials, ca 1900-1968. (2.25 cu. ft.)  {#286m.316}

2. Viewing and Ordering Particular Drawings:

  1. If you wish to view PRR drawings in the archives search room, they may already be out there. There are 13 notebooks on the railroad reference shelves containing 8.5x11" photostatic reductions of most of the general arrangement and cross section tracings, grouped by class. You can request a magnifying glass or an eye "lupe" from the search room desk attendant if the details are too small to read. The notebooks are arranged by general category and class. The professionally produced photostatic reductions reproduce well and surprisingly clearly as 11x17 copies. There is a separate notebook for each of the following 13 categories:

    Steam Locomotives
    Electric Locomotives
    Lines West Locomotive Diagrams (1899-1920)
    Tenders
    Box Cars
    Cabin Cars, Specialty Cars, Lettering Stencils & Miscellaneous
    Flat Cars
    Gondolas
    Hoppers
    Passenger Cars
    Vandalia RR Tenders & Various Car Types
    Vandalia RR Passenger & Baggage Cars
    Advisory Mechanical Committee Drawings

  2. If your drawing is not in the reduction notebooks, then you can request the original to be brought out for inspection, or copied/scanned and mailed to you. Due to preservation concerns, drawings reduced in the notebooks will NOT be pulled or recopied. The most frequently used by the PRR, most of these drawings are damaged and in fragile condition.

  3. If we don't have (or are unable to locate) a particular drawing number that you're interested in, you may want to consult the 500-some rolls of microfilm of the Mechanical Engineering Drawings located in large gray boxes on the right side of the Railroad Vault in the Microfilm Reading Room (rolls #RRV 0378 through 0948). This film was made by the PRR while the drawings were still in possession of the company. If a drawing is now missing from our collection, it may well have been intact and filmed by the company. Unfortunately, however, the film is incomplete and not always in numerical order. There is a finding aid of sorts to the film (PRR microfilm project #PC-12) available in the MG-286 microfilm finding aid box on the shelves of the Archives manuscript reading room. This listing gives the number and size of the first and last drawing number on each roll, offering a browser at least some idea of which rolls to consult. The finding aid also notes that rolls #2 - #75 DO have frame by frame contents listings that, while too voluminous to be placed in the search room, are available from the Archives' collection of master finding aids upon request.

  4. To order a full size photocopy or scan of particular drawings once you know their numbers, you can contact the Railroad Archivist, who will see to it that the drawings are pulled, measured and copied for you. (Please Note: For preservation reasons, if your drawing IS in the aforementioned reproduction notebooks, we will NOT pull or copy the original. You will have to purchase a photoprint or electronic scan of the reduced negative or print, and if you want an enlargement, you will have to make your own arrangements with a private engineering/photo shop of your choice. The elevation drawings tend to be long, brittle and fragile. The purpose of having photostatic reductions made of them was to protect the originals by preventing further damage from use.)

  5. Following is an explanation of the measurements for each size of PRR drawing:

    F size drawing: 11" x 8.5"
    E size drawing: 1.25 ft. x 1.5 ft.
    D size drawing: 1.5 ft. x 2.5 ft.
    C size drawing: 2.5 ft. x 3 ft.
    B size drawing: rolled, 1.5' x (varies)
    A size drawing: rolled, 3' x (varies, up to 20 ft.)

Locomotive drawing

If you need further assistance, you may contact an archivist at ra-statearchives@pa.gov