44: A typical truck of ASF A-3 Ride Control design,
which was first introduced in the mid-1940s and rapidly
become the most popular freight car truck on North
American railroads. Distinctive features were tong travel
springs (note that the inner springs are clearly visible)
and the bulge at the bottom of the side frame which
enclosed the lower part of the spring package.
44
45: A 70-ton version of the ASF A-3 design with 5'8"
wheelbase. The triangular pockets for the friction
wedges between the side frame and bolster are
apparent inside the bolster. What was different from the
Barber Stabilized design was that, instead of separate
friction wedge springs, the small springs inside the
outer main springs applied pressure to the wedges.
45
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