The 80/90MAC is one of today's most powerful locomotives,
seen throughout North America on Class I mainline railroads.
Weighing in at more than 400,000 pounds and with a length in excess of 80 feet,
the 80/90 is one of the heaviest and longest single diesel locomotive in the world.
The 80/90MAC series was introduced by EMD in late
Conrail was the first railroad to receive
the 80MAC in early 1996. As it would turn out, Conrail would be the only original
buyer of this locomotive, even purchasing both of the demonstrator units. CSX
and Norfolk Southern have since acquired these units.
The behemoth SD80 can generate up to 5,000 horsepower.
The maximum speed of the 80/90 is 75 mph.
there have been three production "versions" of the SD90. The production
version Kato has chosen to recreate is the 4,300 horsepower 9043.
Union Pacific, by far, operates the largest fleet of SD90
units. They have even applied different paint schemes to these units.
The 80/90 is equipped with the revolutionary radial truck,
capable of reducing the angle of wear between wheels and rail. While keeping the
wheels parallel to the direction of the track, this truck literally steers the
locomotive through curves. This new technology improves locomotive adhesion and
performance, eliminates several conventional truck components, extends locomotive
component and track life and improves the ride quality. (Source: "Mechanically
Speaking," Volume 3, Issue 12)