Baseline Standard.
Trucks
Trucks shall be snugly mounted, but able to swing freely. Truck located at the A end of the car will only swivel back and forth horizontally. Truck located at the B end of the car will move on 3 point axis.
Trucks must roll freely under weight. Journal boxes will be reamed and dry lubed as appropriate.
Sprung trucks, if used (optional), must equalize under weight.
Bolster
Bolster may be weighted if possible. Brake shoe rigging may be hung, but must not drag agains the wheels.
Wheels
Wheels must meet standards for gauge, tread width, and flange depth as established by the NMRA standards gauge.
No cracked or chipped treads or flanges on wheels.
Wheels must be "in track", that is, not dog-tracking in the truck sideframes.
Wheels must spin freely in the truck.
Wheel treads will not be painted.
Wrought Iron wheels may be used if prototypically correct.
Cast Iron wheels may be used if prototypically correct.
Green Standard. Tread width for wheels will be Code 88 whenever practical.[1]
Tan Standard. Tread width for wheels will be Code 110 whenever practical. [1]
Any additional information will be referenced back to the NMRA standards.
Reference
[1] The term Code 110 and Code 88 relates to the
width of the wheels and has no relationship to track code. Code 110 wheels are
.110" wide and Code 88 are .088" wide. Code 110 wheels are the common
(or "Standard") hobby width wheels and Code 88 are what is called
"Semi-Scale" and are used when the modeler wants a more prototypical
looking wheel width.
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