General Motors SD70MAC Unknown AC Power Quiet Cab Radial Trucks CSX 700- CSX 700- Active First GM order since SD60's

General Motors SD18 Unknown CSX 1075-1087 C&O 1075-1087 Retired Used as road engines Either end considered front B&O ran long hood forward Chessie Cat applied to front Ended as hump engines

General Motors SD20-2 2000 HP Gear Ratio 62:15 Weight 386,500 Tractive Effort 82,200 CSX 2400-2404 B&O 2400-2404 Active Rebuilt from SD35's Work as hump engines Paired with yard slugs

General Motors SD38-2 2000 HP Gear Ratio 62:15 Weight 380,000 Tractive Effort 80,000 CSX 2450-2454 SBD 2450-2454 Active Active

General Motors SD35 2500 HP Gear Ratio 62:15 Weight 354,000 to 392,000 Tractive Effort 77,200 CSX 4505-4599 SBD 4505-4548,4584-4599 B&O 4549-4563 C&O 4564-4572 WM 4574-4576 Retired Worked as pushers Ended as yard engines

General Motors SDP35 2500 HP Gear Ratio 62:15 Weight 354,000 to 392,000 Tractive Effort 77,200 Optional Steam Generator CSX 4505-4599 (Same as SD35s) SBD Mixed in Range Retired None Came with Steam Generators Worked as Road Engines Ended as Yard Engines

General Motors SD40-2 3000 HP Gear Ratio 62:15 Weight 378,000 to 415,000 Tractive Effort 81,000 to 83,160 Dash 2 Electricals CSX 8200-8261 SBD 8200-8241 B&O 8242-8261 Active Used as Road Engines

General Motors SD40 3000 HP Gear Ratio 62:15 Weight 378,000 to 420,000 Tractive Effort 82,100 Regular Electricals CSX 8300-8438 SBD 8300-8338 C&O 8360-8395, 8401-8420, 8426-8432 WM 8396-8400, 8421-8425, 8437-8438 B&O 8433-8436 Active Used as Road Engines Renumbered in 4600's

General Motors SD50 3500 HP Gear Ratio 70:17 Weight 389,000 Tractive Effort 96,300 CSX 8500-8643 SBD 8500-8552, 8596-8623 C&O 8553-8575, 8624-8643 B&O 8576-8595 Active Used as pushers

General Motors SD60 3800 HP Gear Ratio 70:17 Weight 390,000 Tractive Effort 96,300 CSX 8700-8709 CSX 8700-8709 Active Used as pushers Last GM order until SD70MAC's

General Motors SD45 3600 HP Gear Ratio 62:15 Weight 368,000 to 388,000 Tractive Effort 82,100 Flared Radiator Regular Electricals CSX 8900-8944 SBD 8900-8944 Retired Retired

General Motors SD45-2 3600 HP Gear Ratio 62:15 Weight 384,000 to 387,000 Tractive Effort 82,100 to 83,100 Non-flared Radiator Dash 2 Electricals CSX 8959-8982 SBD 8959-8982 Active Used as road engines

General Motors SD7 Unknown CSX 9701-9704 B&O 1827-1830 Retired Used as road engines

General Motors SD9 Unknown CSX 1831-1839 B&O 9706-9715 Retired Used as road engines

Ranges from 1987 to 1993 do not include engines retired, sold, or wrecked.

General Motors F7A 1500 HP Gear Ratio 57:20 Weight 239,900 to 243,000 Tractive Effort 27,500 Built 1948 to 1950 CSX 116,118 SBD 116,118 On Loan to Potomac Eagle All began as Clinchfield units 116 upgraded from F5A to F7A 118 FP7A with steam generator Transfered to SBD 1-1-83 Used for CSX excursions Wide cabs now used instead Leased to MARC by CSXT On Loan to Potomac Eagle

General Motors F7B 1500 HP Gear Ratio 57:20 Weight 239,900 to 243,000 Tractive Effort 27,500 Built 1950 CSX 117,119 SBD 117,119 On Loan to Potomac Eagle 117 former NC&SL unit 119 former L&N unit 117 Steam line and water tank 119 Steam generator Pullman green for excursions Run with CRR #1 Transfered to SBD 1-1-83 Used for CSX excursions Wide cabs now used instead Leased to MARC by CSXT On Loan to Potomac Eagle

General Motors GP9 1600 HP Gear Ratio 62:15 Weight 240,000 to 243,000 Tractive Effort 44,800 Built 1950's SBD converted to GP16's WM chop nosed CSX 200-672 B&O     213, 251, 276, 294, 305, 331     339, 353, 393, 427, 432, 440     453, 457, 459, 469, 471, 473     477, 481, 486, 487, 490, 491     501, 502, 512, 513, 515, 516     519, 521, 530, 532, 533, 537     538, 541, 544, 550, 554, 555     567, 569, 573, 574, 576, 583     584, 585, 586, 589, 590, 593     598, 601, 606, 614, 617, 618     660, 672 C&O     209, 210, 215, 216, 223, 224     225, 239, 243, 244, 249, 250     255, 257, 258, 259, 260, 265     314, 320, 323, 332, 335, 343     346, 352, 354, 362, 367, 369     375, 386, 395, 396, 398, 399     414, 420, 423, 424, 436, 437     439, 474, 483, 488, 502, 549     560, 570, 572, 588, 620 WM     721, 275, 282, 286, 287, 315     400 SBD     624 Retired Used as Road Engines Either end considered front B&O ran long hood forward Chessie Cat applied to front WM converted some to slugs SBD converted to GP16's

General Motors GP7 1600 HP Gear Ratio 62:15 Weight 240,000 to 243,000 Tractive Effort 44,800 Built 1950's SBD converted to GP16's Some converted to GP11's CSX 861,867,883,884 SBD 861,867,883,884 Retired Used as Road Engines SBD converted to GP16's Some converted to GP11's

General Motors GP18 1800 HP Gear Ratio 62:15 Weight 246,000 Tractive Effort 44,800 CSX 1056,1066 SBD 1056,1066 Retired

General Motors Yard Slug Gear Ratio 62:15 Weight 247,000 to 268,000 Converted from GP9's No Fuel Tank Lights on One Side CSX 1010-1050 WM 138T-150T Transfered to B&O/C&O Active Converted from GP9's Paired to GP39's, GP40's, GP38-2's Used as Switchers

General Motors GP15T 1500 HP Gear Ratio 62:15 Weight 244,000 Tractive Effort 47,000 Dynamic Brakes Modern Air Intake Grills CSX 1500-1524 C&O 1500-1524 Active Low Production Model GP15-1 Family C&O One of Two Purchasers Dynamic Brakes Only on GP15T

General Motors GP16 1800 HP Gear Ratio 62:15 Weight 246,000 Tractive Effort 44,800 Began as GP7's or GP9's Rebuilt 1980's CSX 1700-1860 SBD 1700-1860 Retired Used as Switchers Used on Locals Began as GP7's and GP9's

General Motors GP38 2000 HP Gear Ratio 62:15 Weight 256,000 to 277,000 Tractive Effort 55,000 Regular Electricals Built late 60's CSX 2000-2189 B&O 2000-2049, 2100-2119 C&O 2050-2099, 2120-2129 SBD 2131-2189 Active

General Motors GP38-2 2000 HP Gear Ratio 61:16, 62:15 Weight 246,000 to 266,000 Tractive Effort 51,600 to 55,500 Dash 2 Electricals Built Late 70's CSX 2500-2716 SBD 2500-2716 Active

General Motors GP30 2250 HP Gear Ratio 62:15 Weight 248,000 to 262,000 Tractive Effort 52,400 Built in 1960's CSX 4039-4140 SBD 4039-4093 C&O 4097-4104 B&O 4105-4140 Road Slugs 2200-2330

General Motors GP30M 2000 HP Gear Ratio 62:15 Weight 262,000 Tractive Effort 54,700 Built as GP30's in 60's Rebuilt as GP30M's in 80's CSX 4200-4266 C&O 4200-4233 B&O 4234-4266 Retired Built as GP30's in 60's Rebuilt as GP30M's in 80's 4253 Sunburst Restored 4253 Donated to B&O Museum All Units Retired

General Motors GP39 2300 HP Gear Ratio 62:15 Weight 277,000 Tractive Effort 55,000 Regular Electricals Turbo Charged Built 1969 CSX 4280-4299 C&O 4280-4299 Active Low Production Model Only 23 built C&O One of Three Purchasers

General Motors GP39-2 2300 HP? Gear Ratio 62:15? Weight 277,000? Tractive Effort 55,000? Dash 2 Electricals Turbo Charged CSX 4300-4319 Purchased After CSXT D&H, Guilford, Reading Active No Units from Predecessors Units from D&H, Guilford, Reading

General Motors GP35 2500 HP Gear Ratio 62:15 Weight 256,000 to 260,000 Tractive Effort 51,000 CSX 4301-4424 SBD 4301-4323 B&O 4341-4359, 4380-4399, 4421 C&O 4360-4379, 4400-4415, 4422-4424 WM 4416-4420 Retired Retired or converted to road slugs Last units from RF&P

General Motors Road Slug Gear Ratio 62:15 Weight 262,000 Tractive Effort 52,400 Cab Controls and Fuel Tank CSX 2200-2330 CSX 2200-2330 Active Converted from GP30's and GP35's Used as Road Engines Paired to GP38, GP38-2, GP40-2

General Motors GP40 3000 HP Gear Ratio 62:15 Weight 259,000 to 277,000 Tractive Effort 52,600 to 55,000 Last 4-axle B&O 4447 B&O 4447 Repainted & Renumbered 6341 Last 4-axle Unit Purchased for B&O Not Supposed to be Repainted Not Supposed to be Renumber Black Number Boards Dedicated to Arch McElvany Repainted & Renumbered 6341

General Motors GP40 3000 HP Gear Ratio 62:15 Weight 259,000 to 277,000 Tractive Effort 52,600 to 55,000 CSX 6500-6861 B&O 6500-6554, 6575-6639 C&O 6555-6569, 6640-6645, 6826-6854 WM 6570-6574 SBD 6646-6825 RFP 6855-6861 Active

General Motors GP40-2 3000 HP Gear Ratio 61:16, 62:15 Weight 261,000 to 277,500 Tractive Effort 50,490 to 55,400 CSX 6001-6399 B&O     6001-6063, 6084-6155, 6186-6210     6221-6250, 6320-6345, 6392 C&O     6064-6083, 6161-6185, 6270-6319 WM     6156-6160, 6211-6220, 6251-6269 SBD     6346-6391 Active

Ranges from 1987 to 1993 do not include engines retired, sold, or wrecked.