GG1 – Specifications – Technical information

General

Railroads: Pennsylvania, Pen Central, Conrail, Amtrak, New Jersey Department of Transportation, later New Jersey Transit
Builder: GE/PRR, with Baldwin and Westinghouse collaboration; serial: Altoona Works
Price: $250’000 each for first production order
Numbers: PRR and successors: #4800 - #4938, Amtrak: #901 - #939 (later #4901 - #4939), NJT: #4872 - #4884
Production Run: 1934-1943; 139 units
Locomotives Displaced: P5a (to freight service)
Locomotives Displaced by: E44, E60
Service Lifetime: 48 years (full class)

Line Voltage: 11,000 Volts, 25 Cycles (HZ) AC
Operation: Bidirectional

Diagram of engine #4800

Dimensions

Length: 79' 6" = 24232 mm
Width: 10' 6" = 3200 mm
Height: 15' 0" = 4572 mm (with pantograph locked down)
Wheelbase: 69' 0" = 21030 mm
Driver Wheelbase: 37' 4" = 11382 mm
Rigid Wheelbase: 13' 8" (2) = 4165 mm (2)

Weights

Locomotive #4800

• Total: 475’000 lbs = 215,5 t (M) = 237,5 t (US)
• Per Axle: 50’500 lbs = 22,9 t (M) = 25,25 t (US)
• Adhesive Weight: 303’000 lb = 137,4 t (M) = 151,5 t (US)
• Per End Truck: 86’000 lbs (per bogie) = 39 t (M) = 43 t (US)

Locomotives #4801 - #4857

• Total: 460’000 lbs = 208,7 t (M) = 230 t (US)
• Per Axle: 50’000 lbs = 22,7 t (M) = 25 t (US)
• Adhesive Weight: 300’000 lb = 136,1 t (M) = 150 t (US)
• Per End Truck: 80’000 lbs (per bogie) = 36,3 t (M) = 40 t (US)

Locomotives #4858 - #4868 & #4889 - #4938

• Total: 477’000 lbs = 216,4 t (M) = 238,5 t (US)
• Per Axle: 50’500 lbs = 22,9 t (M) = 25,25 t (US)
• Adhesive Weight: 303’000 lb = 137,4 t (M) = 151,5 t (US)
• Per End Truck: 87,000 lbs (per bogie) = 39,5 t (M) = 43,5 t (US)

Locomotives #4869 - #4888

• Total: 468’400 lbs = 212,5 t (M) = 234,2 t (US)
• Per Axle: 50’000 lbs = 22,7 t (M) = 25 t (US)
• Adhesive Weight: 300’000 lb = 136,1 t (M) = 25 t (US)
• Per End Truck: 84,200 lbs (per bogie) = 38,2 t (M) = 42,1 t (US)
  

Diagram of engines #4801 - #4857 (GG1b)

Mechanicals

Wheel Arrangement: 2-Co’+Co’-2 (4-6-6-4)
Driver diameter: 57" = 1448 mm
Truck Wheel diameter: 36" = 914 mm
Traction transmission: quill-drive, 2 motors per quill

Gearing

• Passenger: 24:77
• Freight: 24:79
  

Diagram of engines #4858 - 4868, 4889 - 4938

Ratings
Total HP: 4’620 HP (continuous)
Drawbar HP: 8’600 HP (short term)

• at 49 mph: 9’500 HP
• at 100 mph: 8’000 HP

Tractive Effort: 72’800 lbs (average) = 324 kN

• Passenger gear: 70’700 lbs = 315 kN
• Freight gear: 75’000 lbs = 334 kN

Maximum Speed: 110 mph (in testing) = 177 km/h

• Passenger gear: 100 mph (enabled in service) = 161 km/h
• Freight gear: 90 mph (enabled in service) = 144 km/h

Acceleration 0 to 100 mph: 65 seconds with passenger gearing

Diagram of engines #4869 - 4888

Electricals

Transformer: 4800 KVA

• Weighed: 30’300 lbs = 13,7 t (M) = 15,15 t (US)

Control (electro-pneumatic): Tap Changer (tap switcher)

• Control Notches: 22

Traction Motors: GEA-627-A1 (6 poles)

• Ratings: 400 Volts (AC); 385 HP
• Arrangement: 12 in 6 pairs

Batteries: 32V, 300 amp/hour

Auxiliaries
Blowers: 2 x 55 HP
Compressor: 150 cf/min (displacement at 100 rpm) = 4’250 l/min
Boiler: 4’500 lbs (2040 kg) of steam per hour at 200 psi (13,8 bar)
Weighed: 14’200 lbs = 6,44 t (M) = 7,1 t (US)
Boiler Water: 2’761 gallons (10’450 l); (except #4800 had a boiler capacity of 2’245 gallons (8’500 l))
Boiler Oil: 424 gallons = 1’605 l


Sources:
http://www.spikesys.com/GG1/
http://www.steamlocomotive.com/
http://www.rr-fallenflags.org/