Brief History of Freight Car Trucks by alicejenny

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									A Brief History of Freight Car Trucks
Kadee (http://www.kadee.com)




                                         The Arch Bar Truck is a typical truck from around
the turn of the century (1900s). Despite the age of these trucks, they saw more than
seventy years of service in some applications. The arch bar was allowed in interchange
service until about 1941. On railroads that were not common carriers such as logging or
other industrial lines, this restriction of the trucks did not apply since the trucks did not
operate on rails other than the owner's. The Northern Pacific, for example, used truss rod
frame maintenance of way cars fitted with arch bar trucks well into the early 1970's.
Many logging railroads also used them at least until then. (Kadee #501 & #551 Arch Bar
33" ribbed back wheels)




                                      The Andrews truck (1898) is also a turn of the
century design that was long lived. It represents one of the first steps in the development
of the modern freight truck with its cast frame. The journal boxes are bolted to the main
frame. This truck was used through the end of the 1950's although by that time was only
used in lighter applications such as refrigerator cars. Andrews trucks are probably still
used were logging railroads remain in operation. (Kadee #509 & #553 Andrews (1898)
Truck 33" ribbed back wheels)




                                    The Bettendorf T-Section truck was introduced in the
1920's with a one-piece cast sideframe. It had a life similar to the Andrews truck. (Kadee
#511 & #554 Bettendorf T-Section Truck 33" ribbed back wheels)




                                   The Vulcan truck was introduced in the 1920's as
another replacement for the archbar truck. The Vulcan design incorporated a pin which
held the journal box in place. Removal of the pin allowed the journal box to be quickly
replaced. This truck lasted to the end of the steam era on mainline railroads and
somewhat longer on logging railroads. (Kadee #515 Vulcan Double Truss Truck 33"
ribbed back wheels)




                                       The Pennsylvania Railroad Class 2D-F8 50-ton
freight truck was originally manufactured in the 1920's with a riveted bolster but a cast
steel bolster version was introduced in the 1930's. This type of truck was in faithful
service for more than fifty years. (Kadee#517 Pennsylvania 2D-F8 50-Ton Truck 33"
ribbed back wheels)




                                    The Bettendorf Double Truss Truck was introduced
in the 1930's by U.S. railroads and was allowed to be used in interchange service through
1993. (Kadee #500 & #550 Bettendorf Truck 33" smooth back wheels)




                                          The A S Foundries® A-3 Ride Control® 50-ton
freight truck was introduced in the 1940's and is one of the forerunners of modern freight
trucks. Features embodied into this design include a longer spring travel, no spring planks
and constant friction control using friction castings in the bolster to dampen excessive
lateral roll of the car. These design features allowed for a higher train speed with less
danger of derailment than previous designs. ASF® sold over 140,000 sets by 1949. This
truck is excellent for modeling the transition era up to 1994 when friction bearings were
no longer allowed in interchange service. (Kadee #504 & #552 ASF® Ride Control® 50-
Ton Truck 33"smooth back wheels)
                                         The Barber S-2 70-ton Roller Bearing truck is a
logical development from the original friction bearing truck first introduced in the 1940's.
The sturdiness of the Barber® S-2 truck is evidenced by the forty plus years it has rode
the rails to date. A careful observer will spot these trucks in interchange use today. This
truck can be used under almost any pre-1970 built 70-ton rolling stock. (Kadee #518
Barber® S-2 70-Ton Roller Bearing Truck 33" smooth back wheels)




                                          The 100-ton Roller Bearing Truck is from the
modern diesel era. It has standard 36 inch wheels and a longer wheel base than the 50 or
70 ton roller bearing trucks. Our model is a faithful reproduction of the American Steel
Foundries® Ride Control® truck. This truck is currently in use under a variety of rolling
stock in North America. (Kadee #513 Roller Bearing Truck 36" smooth back wheels)

								
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