Somebody awhile back asked about the pulling power of a N Scale IM F-7. I just did a quick test. 1 F-7 pulled 4 Roundhouse 50ft boxcars, 1 Atlas 50 ft boxcar, 1 Atlas 60 ft boxcar, 2 Atlas 90 Ton hoppers, 2 Boswer H-21a hoppers, 2 Kato Budd coaches and a Kato Budd Baggage car. All cars have metal wheels on level Kato Unitrack with 12 3/8 Radius curves and the F-7 did not strain a bit. I am going to do some more testing tomorrow.
Gary