EMD GP30
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| Type and origin | |
|---|---|
| Power type | Diesel-electric |
| Builder |
GM Electro-Motive Division (EMD) General Motors Diesel (GMD) |
| Model | GP30 |
| Build date | July 1961 – November 1963 |
| Total produced | 948 |
| Specifications | |
|---|---|
| AAR wheel arr. | B-B |
| UIC class | Bo′Bo′ |
| Length | 56 ft 2 in (17.12 m) |
| Loco weight | 253,000 lb (115,000 kg) |
| Fuel capacity |
Standard: 1,700 US gal (6,400 l; 1,400 imp gal), Optional: 2,600 US gallons (9,800 l; 2,200 imp gal) |
| Lubricant cap | 200 US gal (760 l; 170 imp gal) |
| Coolant cap | 240 US gal (910 l; 200 imp gal) |
| Sandbox cap | 18 cu ft (0.51 m3) |
| Prime mover | EMD 567D3 |
| Engine type | Two-stroke V16 diesel |
| Aspiration | Turbocharger |
| Displacement | 9,072 cu in (148.66 l) |
| Generator | EMD D-32 |
| Traction motors | EMD D67B (4) |
| Cylinders | 16 |
| Cylinder size | 8 1⁄2 in × 10 in (216 mm × 254 mm) |
| Transmission | Diesel electric |
| Loco brake | Schedule 26L Straight air, optional: dynamic |
| Performance figures | |
|---|---|
| Maximum speed | 83 mph (134 km/h) (dependent on gearing) |
| Power output | 2,250 hp (1,680 kW) |
| Tractive effort | 63,375 lbf (281.9 kN) |
| Career | |
|---|---|
| Locale | North America |
The EMD GP30 is a 2,250 hp (1,680 kW) four-axle B-B diesel-electric locomotive built by General Motors Electro-Motive Division of La Grange, Illinois between July 1961 and November 1963. A total of 948 units were built for railroads in the United States and Canada (2 only), including 40 cabless B units for the Union Pacific Railroad.
It was the first so-called "second generation" EMD diesel locomotive, and was produced in response to increased competition by a new entrant, General Electric's U25B, which was released roughly at the same time as the GP30. The GP30 is easily recognizable due to its high profile and stepped cab roof, unique among American locomotives. A number are still in service today in original or rebuilt form.
The GP30 was conceived out of the necessity of matching new competitor GE's U25B. The U25B offered 2,500 hp (1,860 kW) while EMD's GP20 and its 567D2 prime mover was only rated at 2,000 hp (1,490 kW). The U25B also featured a sealed, airtight long hood with a single inertial air intake for electrical cooling, with a pressurized cooling system which kept dust out of the engine and equipment area. Finally, the entire GE design was optimized for ease of access and maintenance. The U25B demonstrators were receiving much praise—and orders—from the railroads that tested them. Meanwhile, ALCO had been producing the 2,400 hp (1,800 kW) RS-27 since 1959, though it had not sold well.
EMD's engineering department pushed their DC traction system for an extra 250 hp (186 kW). The 2,250 hp (1,680 kW) wasn't quite equivalent to the GE and ALCO offerings, but EMD hoped the railroads' familiarity with EMD equipment would improve their chances. The locomotive in which the 16 cylinder, 567D3 would be fitted, was improved along the lines of the U25B; sealed long hood, central air intake, and engineered for easier maintenance access. The frame and trucks of the GP20 were carried across; the extra equipment for the centralized air system required more space behind the cab, and since the locomotive was not going to be lengthened, extra space was achieved vertically by raising the height of the locomotive, giving room for the central air system, turbocharger and electrical cabinet all behind the cab. This extra height behind the cab meant that the body style used for previous GP units was not suitable.
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Wikipedia