AAR Clearance Plate Diagrams
ALCO Locomotive Lengths Drill Bit Chart
eGroups EMD Locomotive Lengths
GE Locomotive Lengths Helper Engine Shed
Helper Spins Map Tunnel Motor Closeups
Rio Grande Entries in the Model Train Magazine Index Database
National Model Railroad Association Standards and Recomendations
Converting degrees of curvature to radius:
radius in feet = 5729 / degree of curvature
degree of curvature = 5729 / radius in feet
5729 / x = y Where x is the known factor.
1" in 100" = 1%
#4 = 14º 15'
#5 = 11º 25'
#6 = 9º 32'
#7 = 8º 10'
#8 = 7º 09'
#9 = 6º 22'
#10 = 5º 43'
Arch bar trucks banned from interchange after 7/01/40.
Wood walkways banned on new cars.
Running boards were eliminated from all boxcars (without roof hatches)with cars placed in service after October 1, 1966.
On cars built earlier, all running boards and high hand barke wheels to be removed by April 1, 1974.
Footboards on switcher locomotives were eliminated from locomotives built after March 31, 1975.
Footboards to be removed from all locomotives by September 30, 1978.
Last Update 09/14/05
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