Pennsylvania Railroad class R1

American electric locomotive prototype

PRR R1

R1 #4800 in its builders' portrait

| Type and origin

Power type| Electric
Builder| Baldwin-Westinghouse
Serial number| BLW: 61817
Build date| 1934
Total produced| 1
| Specifications

Configuration:
| ​
• Whyte| 4-8-4
• AAR| 2-D-2
• UIC| 2'Do2'
Gauge| 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.| 36 in (0.914 m)[1]
Driver dia.| 62 in (1.575 m)[1]
Wheelbase| 54 ft 0 in (16.46 m)[1]
Length| 64 ft 8 in (19.71 m)[1]
Width| 10 ft 6.19 in (3.21 m)[1]
Height| 15 ft 0 in (4.57 m) over locked-down pantographs[1]
Axle load| 57,500 lb (26,080 kg; 26.08 t)[1]
Adhesive weight| 230,000 lb (104,300 kg; 104.3 t)[1]
Loco weight| 402,000 lb (182,300 kg; 182.3 t)[2]
Fuel capacity| 487 US gal (1,840 L; 406 imp gal) (for train heat boiler)[1]
Water cap.| 2,041 US gal (7,730 L; 1,699 imp gal) (for train heat boiler)[1]
Electric system/s| 11 kV AC @ 25 Hz
Current pickup(s)| Pantograph
Traction motors| Westinghouse, 625 hp (466 kW), eight off
| Performance figures

Maximum speed| 100 mph (160 km/h)[2]
Power output| 5,000 hp (3,700 kW)[2]
Tractive effort| 18,750 lbf (83.4 kN) at 100 mph (160 km/h)
| Career

Numbers| 4800, later 4899, later 4999
Retired| 1959
Scrapped| 1959

The Pennsylvania Railroad's class R1 comprised a single prototype electric locomotive constructed in 1934 by the Baldwin Locomotive Works of Philadelphia, Pennsylvania, US, with the electrical equipment by Westinghouse.[2]

It was built as a competitor to the GG1 design, but after trials the GG1 was selected for volume production on the basis of its superior tracking and riding qualities; the R1 prototype, however, remained in service. It was numbered 4800 originally, swapped numbers with the victorious GG1 prototype to #4899, but was moved in May 1940 to #4999 to make room for the expanding GG1 fleet.[3]

For many years, the R1's regular duties involved hauling the westbound Broadway Limited and returning eastward with a mail and express train. The long rigid wheelbase of the locomotive caused occasional derailments in Sunnyside Yard and elsewhere.

The R1 design had four driven axles in a rigid locomotive frame, like a steam locomotive. Each was driven by two 625-horsepower (466 kW) traction motors driving the wheels through a quill drive and sprung cups. Each end of the double-ended locomotive has a four-wheel truck to guide the locomotive at speed, giving the R1 a 4-8-4 wheel arrangement in the Whyte notation (AAR: 2-D-2; UIC: 2'Do2'). Besides the R1, the PRR did not build or order any other 4-8-4 locomotives, however the T1 duplex was essentially a 4-8-4 with two sets of driving wheels as a 4-4-4-4. In many respects the design resembled the earlier, lighter P5, but with an extra driving axle and lower axle loads.

## References

[edit]

1. ^ a b c d e f g h i j Pennsylvania Railroad. "PRR R1 Diagram". PRR.Railfan.net. Retrieved 2008-08-27.
2. ^ a b c d Staufer, Alvin F.; Pennypacker, Bert (1962). Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900-1957. Research by Martin Flattley. Carollton, Ohio: Alvin F. Staufer. OCLC 8029613.
3. ^ Barris, Wes. "The Pennsylvania Railroad GG1: The R1". SteamLocomotive.com. Archived from the original on 2008-09-18. Retrieved 2008-08-27.

* v
* t
* e

Electric locomotives built by the Westinghouse Electric Company

DC Electrics|

* PRR AA1
* MILW EP-3

AC Electrics|

* NH EP-1
* CN Z-2
* NH EY-2
* NH EF-1
* NH EP-2
* PRR P5a
* PRR R1
* NH EF-3b

AC Electrics (side rod)|

* N&W LC-1
* N&W LC-2
* VGN EL-3A

AC Electrics (motor generator)|

* GN Z-1

AC Electrics (Ignitron rectifier)|

* PRR E3b
* PRR E2c

(see also: List of Westinghouse locomotives)

* v
* t
* e

Pennsylvania Railroad locomotives

|    |

| A (0-4-0):|

* A1
* A2
* A3
* A4
* A5s

|

B (0-6-0):|

* B1 (s)
* B2
* B3
* B4
* B5
* B6
* B7
* B8
* B1 (e)

C (0-8-0):|

* C1
* C29
* C30
* C31

D (4-4-0):|

* D1
* D2
* D3
* D4
* D5
* D6
* D7
* D8
* D9
* D10
* D11
* D12
* D13
* D14
* D15
* D16
* D21
* D22
* D23
* D24
* D25
* D26
* D30
* D31
* D32
* D33
* D34
* D35
* D36
* D37
* D38
* D39
* D61
* "Odd D" #10003

E (4-4-2):|

* E1
* E2
* E3
* E4
* E5
* E6
* E7
* E21
* E22
* E23
* E28
* de Glehn

F (2-6-0):|

* F1
* F2
* F3
* F21
* F22
* F23
* F24
* F25
* F26
* F27
* F30
* F31
* F61

G (4-6-0):|

* G1
* G2
* G3
* G4
* G5
* G6
* G53

| H (2-8-0):|

* H1
* H2
* H3
* H4
* H5
* H6
* H8
* H9
* H10

|

I (2-10-0):|

* I1

J (2-6-2 and 2-10-4):|

* J1
* J28

K (4-6-2):|

* K1
* K2
* K3s
* K4s
* K5
* K21s
* K28
* K29s

L (2-8-2):|

* L1s
* L2s
* L5
* L6

M (4-8-2):|

* M1

N (2-10-2):|

* N1s
* N2s

O (4-4-4):|

* O1

| P (4-6-4):|

* P5

|

Q (4-6-4-4 and 4-4-6-4):|

* Q1
* Q2

R (4-8-4):|

* R1

S (6-4-4-6 and 6-8-6):|

* S1
* S2

T (4-4-4-4):|

* T1

Articulated steam locomotives:|

* CC1s
* CC2s
* HC1s
* HH1
* HH1s
* HH2s

Articulated electric locomotives:|

* AA1
* BB1
* BB2
* BB3
* DD1
* DD2
* FF1
* FF2
* GG1

Non-standard:|

* E2b
* E2c
* E3b
* E44

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