PRR E6
E6s #1067 in its builders' photograph.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Type and origin | |
|---|---|
| Power type | Steam |
| Designer | Alfred W. Gibbs |
| Builder | PRR Juniata Shops |
| Build date | 1910–1914 |
| Total produced | 83 |
| Specifications | |
|---|---|
| Configuration | 4-4-2 |
| UIC class | 2'B1' |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) standard gauge |
| Leading dia. | 36 in (914 mm) |
| Driver dia. | 80 in (2,032 mm) |
| Trailing dia. | 50 in (1,270 mm) |
| Wheelbase | 29 ft 7 1⁄2 in (9.030 m) |
| Length | 41 ft 3 1⁄2 in (12.586 m) (locomotive only) 72 ft 6 in (22.10 m) (including tender) |
| Width | 10 ft 0 in (3.05 m) |
| Height | 15 ft 0 in (4.57 m) |
| Axle load | 66,000 lb (30,000 kg) |
| Adhesive weight | 136,000 lb (62,000 kg) |
| Loco weight | 243,600 lb (110,500 kg) |
| Total weight | 401,600 lb (182,200 kg) |
| Fuel type | Soft coal |
| Fuel capacity | 25,000 lb (11,000 kg) |
| Water cap | 7,000 US gal (26,000 l; 5,800 imp gal) |
| Firebox: • Firegrate area |
55.13 sq ft (5.122 m2) |
| Boiler pressure | 205 psi (1.41 MPa) |
| Heating surface | 2,896.20 sq ft (269.066 m2) |
| • Tubes | 1,900.66 sq ft (176.577 m2) |
| • Flues | 777.54 sq ft (72.236 m2) |
| • Firebox | 218 sq ft (20.3 m2) |
| Superheater: |
|
| • Heating area | 980 sq ft (91 m2) |
| Cylinders | 2 |
| Cylinder size | 26 in × 23 1⁄2 in (660 mm × 597 mm) |
| Valve gear | Walschaert |
| Valve type | piston valves |
| Performance figures | |
|---|---|
| Tractive effort | 31,275 lbf (139.12 kN) |
| Factor of adh. | 4.35 |
Class E6 on the Pennsylvania Railroad was the final type of 4-4-2 "Atlantic" locomotive built by the railroad, and second only to the Milwaukee Road's streamlined class A in size, speed and power. Although quickly ceding top-flight trains to the larger K4s Pacifics, the E6 remained a popular locomotive on lesser services and some lasted to the end of steam on the PRR. One, #460, called the Lindbergh Engine, is preserved at the Railroad Museum of Pennsylvania. It was moved indoors to begin preparations for restoration on March 17, 2010. On January 10, 2011, PRR #460 was moved to the museum's restoration shop for a two- to three-year project, estimated to cost $350,000. The engine is listed in the National Register of Historic Places.
The E6 was designed by the Pennsy's General Superintendent of Motive Power, Lines East, Alfred W. Gibbs, and his team. They produced an Atlantic of modern design, featuring a large and free-steaming boiler, outside Walschaert valve gear, piston valves on the cylinders, and a cast steel KW pattern trailing truck designed by the PRR's Chief Mechanical Engineer, William F. Kiesel, Jr. Modern features never present on the E6 design, and never retrofitted, included the mechanical stoker, power reverse and feedwater heater.
A single prototype E6 locomotive, #5075, was turned out by the PRR's Juniata Shops in 1910; after the railroad's normal fashion, it would embark on a lengthy process of testing and experimentation before a production order was placed.
...
Wikipedia