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Click on a photo to retrieve it. Click on the name below the photo to contact the OWNER of the photo.

In 1940, EMC built 3 drawbar-connected cab-and-booster NW2 sets for moving trains short distances from one railroad to another. These transfer units were nicknamed "Cow-Calf". Unlike Slugs, the "B" units had prime mover diesel engines, with exhaust stacks and radiators.

Although they look similar, Slugs/Power Mates are two locomotive units operating in tandem, both of which are equipped with traction motors. Only the locomotive is equipped with diesel engine and main generator, which provides the electric power for traction motors in both units.


IC TR-1AB #1350A
, E St Louis IL
©Dennis Schmidt

Southern Ontario RaiLink TRB [pre-war NW2 calf] #1200
, Hamilton, ON 1999, ex-PAL 1300B; rblt to SW13B by ICG 1300B; ex-IC 1026B; nee IC 9203B, blt 1940 cn1032B
Doug Kroll

Chicago Great Western TR2A-B[NW2] cow-calf #66
, S. Saint Paul MN 1971 blt 1949 cn6893, 6894
Pat Huemmer

CNW TR2 #62A&B
, St Paul MN 1970, nee CGW, blt 1949 cn6882,9
©Dennis Schmidt

CNW TR2A [NW-2] #1015
, N Fond du Lac WI 1975, nee CGW 63A, blt1949 cn6885
Keith Meacham-DR

CNW TR2B[NW-2] #1104
, N Fond du Lac WI 1975, nee CGW 63A, blt1949 cn6885
Keith Meacham-DR

Chicago and North Western TR-2A #2000
, Chicago, IL 1971, blt 1949 cn10021, to CNW1009

Belt Ry. of Chicago TR2A[NW-2] #501
, Chicago IL 1997 - EMD 75th, blt 1949 cn 10513
David L. Miller

Belt Ry. of Chicago TR2AB[NW-2] #501-511
, Chicago IL 1985 , blt 1949 cn 10513, 10515
© Lou Marre-GS

Belt Railway of Chicago TR2B[NW2 calf] #510
, Bedford Park IL 1986 blt 1979 cn 10514
Doug Kroll

Belt Railway of Chicago TR2B[NW2 calf] #511
, Pullman Jct., Chicago IL 1979 cn10515
Brian Nicholson

CBQ EMD TR2AB #9409
, Centralia IL 1974
Joseph Testagrose

CO TRA2AB #6000
, 1961

BO TR3A[NW2] #9556
, Newark NJ 1986, blt 1949 cn10255, nee CO 6500B
Kermit Geary Jr

BO TR3A[NW2] #9557
, Newark NJ 1986, blt 1949 cn10258, nee CO 6501B
Kermit Geary Jr

Belt Ry. of Chicago TR4AB[SW7] #502-514
, Chicago IL 1998, blt 1950, cn10516, 10523
©K Rottman

Belt Railway of Chicago TR2B[NW2 calf] #510 & TR4A[SW7] #503
, Bedford Park IL 1986 cn10514, 10517
Doug Kroll

Belt Ry. of Chicago TR4A [SW7] #504
, Chicago IL 1977, blt 1950 cn10518
©Dennis Schmidt

Belt Ry. of Chicago TR4AB [SW7] #505-513
, Chicago IL 1999, blt 1950, cn 10519, 10522
©Dennis Schmidt

Belt Ry of Chicago TR4AB #506
, Bedford Park, IL 1964, blt 1950 cn10520
Jerry Appleman

Belt Ry. of Chicago TR4AB [SW7] #506-516,
, Chicago IL 1999, blt 1950 cn10520, 10525
©K Rottman

Belt Ry. of Chicago TR4A [SW7] #506
, Chicago IL 2002, blt 1950 cn10520
©K Rottman

Belt Ry. of Chicago TR4B [SW7] #512
, Chicago IL 2002, blt 1950 cn10521
©K Rottman

Belt Ry. of Chicago TR4B[SW7] #512
, Chicago IL 1979, blt 1950 cn10521
©Dennis Schmidt

Belt Ry. of Chicago TR4B [SW7] #513
, Chicago IL 1975, blt 1950 cn10522, to MNNR 911
©Dennis Schmidt

Belt Ry. of Chicago TR4B [SW7] #514
, Chicago IL 1974, blt 1950 cn10523
©Dennis Schmidt

Belt Ry. Co. of Chicago TR4 #515
, Chicago IL 1992
©Dennis Schmidt

Belt Ry. of Chicago TR4B [SW7] #516
, Chicago IL 1986, blt 1950 cn10524
Kermit Geary Jr

Milwaukee Road TR4AB #695
, Chicago, IL 1965, blt cn 12451, nee CMSTP 2006A
Jerry Appleman

MILW TR4B #690
, Bensenville, IL 1978, blt cn 11403, nee CMSTP 2001B
Ken Houghton

MILW TR4A #693
, LaCrosse, WI 1972, blt cn 12449, nee CMSTP 2004A

MILW TR4B #694
, Bensenville, IL 1977, blt cn 12450, nee CMSTP 2005A

Santa Fe TR4A-B[SW7] #1418-1418A
, Kansas City MO 1977, rblt 1979 to SSB1200 #1242-1243, blt 1950 cn 12360-1?, nee ATSF 2418
Doug Kroll

UP TR5B (SW9) #1871
, North Platte NE. 1969, blt 1951 cn 15069
© Gary Stuebben

UP TR5A (SW9) #1873
, Provo UT 1968, blt 1951 cn 15071

UP TR5AB #1875
, Provo, UT 1980, blt 1951 cn 15073
Ken Houghton

UP TR5AB cow-calf [SW9] #1874
, Portland OR 1979, blt 1951 cn 15072
Steve L. Dixon

SP TR6AB [SW8] #1113-1153
, blt 1953 & 1951, cn17335 & 15119, nee SP 4608 & 4703
Dave Wheeler

SP TR6B [SW8] #1153
, Roseville CA 1971, blt 1951 cn 15119, nee SP 4703
RL Dengler

SP TR6B [SW8] #1152
, Roseville CA 1970, blt 1951 cn15118, nee SP 4702
RL Dengler

SP TR6B [SW8] #1150
, 1999
DV Jewel

SP TR6A [SW8] #1102
, Roseville CA 1975, blt 1951 cn15085, nee SP 4602
RL Dengler

SP TR6A [SW8] #1102
, Roseville CA 1975, blt 1951 cn15085, nee SP 4602
RL Dengler

Oliver Mining TR6A & B #1221
, Frazer MN 1974, blt 1951 cn15130
©Tom Strauss-DS

Oliver Iron Mining Co EMD TR6A&B #1216
, Cleveland, OH, blt 1953
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North East Rails  © Clint Chamberlin.
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