PRR Q1
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| Type and origin | |
|---|---|
| Power type | Steam |
| Builder | Pennsylvania Railroad |
| Serial number | Altoona 4383 |
| Build date | 1942 |
| Total produced | 1 |
| Specifications | |
|---|---|
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) standard gauge |
| Driver dia. | 77 in (1.956 m) |
| Length | 122 ft 9 3⁄4 in (37.433 m) |
| Adhesive weight | 354,700 lb (160,890 kg) |
| Total weight | 1,027,870 lb (466,230 kg) |
| Fuel type | Soft coal |
| Fuel capacity | 82,640 lb (37,485 kg) |
| Water cap | 19,167 US gal (72,550 l; 15,960 imp gal) |
| Boiler pressure | 300 psi (2.1 MPa) |
| Cylinders | 4 |
| Front cylinder | 23 in × 28 in (584 mm × 711 mm) |
| Rear cylinder | 19 1⁄2 in × 26 in (495 mm × 660 mm) |
| Valve gear | Walschaerts |
| Performance figures | |
|---|---|
| Tractive effort | Locomotive: 85,000 lbf (378.10 kN) Booster: 11,250 lbf (50.04 kN) Total: 96,250 lbf (428.14 kN) |
| Career | |
|---|---|
| Operators | Pennsylvania Railroad |
| Numbers | 6130 |
| Disposition | withdrawn 1946, scrapped 1949 |
The Pennsylvania Railroad's class Q1 comprised a single experimental steam locomotive for freight service, #6130, built in March 1942. A duplex locomotive, it had a wheel arrangement of 4-6-4-4, comprising a four-wheel leading truck, two sets of driving wheels (six followed by four) in a rigid locomotive frame, and a four-wheel trailing truck. The first group of six driving wheels was driven by a pair of cylinders mounted conventionally in front of them, while the rear four driving wheels were driven by cylinders mounted behind them on either side of the firebox.
Unusual for a locomotive designed for pure freight service, it was given passenger-locomotive sized driving wheels at 77 in (1.956 m) and streamlining in the form of a bluntly pointed nosecone on the smokebox front as well as long side skirts covering up the locomotive's pipework. The cab front was set at a rakish angle. The tender, although given a freight locomotive's "doghouse" on the rear deck for the head-end brakeman, was otherwise a streamlined affair very similar to that used on the S1, S2, and T1 passenger locomotives.
During its short service life it spent more time in shops or the enginehouse than being run, accumulating only about 65,000 service miles in its career. It was assigned to the St. Clair Avenue Enginehouse in Columbus, Ohio and ran mostly in the Ohio area and to Chicago, Illinois.
In December 1944 it appeared at a PRR exhibition in Chicago's Union Station entitled "Presenting a Line of Modern Coal-Burning Steam Locomotives". At some time during the next year it lost much of its streamlining, the nosecone being removed in favor of a conventional PRR smokebox front including the keystone numberplate placed centrally on the small smokebox door. A headlamp bracket mounted above that door also hung the locomotive's bell. The side skirting was cut back to expose pipework and fittings for easier maintenance. The skyline casing atop the boiler remained in place.
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Wikipedia