Kadee #552 HO Scale A.S.F. A-3 Ride Control 50 Ton Self Centering Trucks with 33" Smooth Back Wheels - Metal Fully Sprung
#552 A.S.F.® A-3 Ride Control® 50 Ton Self Centering Trucks with 33" Smooth Back Wheels - HO Scale
Metal Fully Sprung Equalized Trucks
Mounts with Kadee Self Centering bushing on a flat surface with a #2 or 2-56 screw or without the Kadee Self Centering bushing on a 0.140" or smaller molded on truck post secured with the original screw.
Introduced in the 1940’s - Used in interchange service through 1994.
The A.S.F.® 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.
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. The Kadee® #500, #502 & #550 represent 50- ton trucks for 100,000 pound cars.
