Radial steering truck
Radial Steering Trucks, also known as Radial Bogie Trucks, are a somewhat experimental version of wheel assemblies found under almost all modern railway rollingstock; this generally excludes historic 2Axle wagons and steam locomotives (e.g. a 0-6-0). Bogie trucks under coaches|wagons are typically unpowered 2Axle or less common 3Axle designs; bogie trucks under diesel and electric locomotives are typically 2Axle "B" or 3Axle "A1A or C" and rarely 4Axle "D" designs, powered with trac motors which drive the wheels through toothed AxleBull~MotorPinion gears. For non-radial standard bogie trucks, the more axles in the assembly, the more difficulty it has negotiating curves, due to wheel flange to rail friction. For radial bogie trucks, the wheel sets actively "steer" through curves, thus reducing wear at the wheel flange to rail interface and improving adhesion; various radial designs are depicted and described below.
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EMD#HTCR
Radial Bogie Trucks On
EMD#SD70MAC CP#9112 -
GE#SelfSteering
Radial Bogie Trucks On
GE#AC44 FSRR#4427
EMD#HTCR[edit]
EMD#HTCR 3Axle "C" radial bogie trucks were developed and tested 1987~1992 under experimental locomotive EMD#SD60 EMD#3, later numbered GMTX#9000. The HTCR was then made standard equipment for the EMD#SD70 6Axle "C-C" locomotive series, first sold in 1993. However, the HTCR in actual operation had mixed results and relatively high purchase and maintenance costs. Thus the EMD#HTSC was introduced in 2003, which basically is the HTCR stripped of radial components.
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EMD#HTCR
Radial Bogie Trucks On
EMD#SD70M2 CN#8903 -
EMD#HTSC
Bogie Trucks On
EMD#SD70ACe UP#1983 -
EMD#HTSC
Bogie Trucks On
EMD#SD70ACe UP#1988 -
EMD#HTSC
Bogie Trucks On
EMD#SD70ACe BHPB#4352
_(8098478098).jpg)
_(cropped).jpg)
GE#SelfSteering[edit]
The GE#SelfSteering 3Axle "C" radial bogie truck was introduced in 1995 as a buyer option under GE#AC44 and later GE#ES44 6Axle "C-C" locomotives. However it also met with limited acceptance due to relatively high purchase and maintenance costs, and customers have generally chosen GE#HiAd standard bogie trucks for newer and rebuilt locomotives.
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GE#SelfSteering
Radial Bogie Trucks On
GE#ES44 CSX#948 -
GE#SelfSteering
Radial Bogie Trucks On
GE#ES44 CSX#307 -
GE#SelfSteering
Radial Bogie Trucks On
GE#AC44 KCS#4567 -
GE#SelfSteering
Radial Bogie Trucks On
GE#AC44 KCS#4575
_(38782636872).jpg)
External links[edit]
- Locomotive Bogie Truck EMD#HTCR Sales, Archived
- Locomotive Bogie Truck EMD#HTCR Patent Filed 1987 Then Granted 1988
- Locomotive Bogie Truck GE#Radial Patent Filed 1995 Then Granted 1997
See also[edit]
- Locomotive Bogie Truck EMD#FlexiCoilC+D
- Locomotive Bogie Truck EMD#BlombergB+M+X
- Locomotive Bogie Truck EMD#BlombergA1A
- Locomotive Bogie Truck EMD#AARA
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