oldtimer 66
Platinum Member
A note on curving. If I remember correctly the railroads do rail spreading in the curves. Again from memory, 3mm per degree of curve.
Most of the US railroads now use stick lubrication on the locomotive trucks. Years ago it was a grease in a pressurized tank with lines and nozzles to the sander mountings on the locomotive. Messy as " California " noted. This was done to reduce flange wear on the wheel and wear on the inside of the rail.
There is a class "c" wheel, which has has a higher brinell number, that are some time's used in switching locomotives. The switching loco's generally work yards with numerous curves.
Last note is that there are "steerable 3 axle locomotive trucks". Axles 1 and 3 are connected thru linkages and they " yaw in concert " when going thru a curve. This design minimized the wheel and rail wear and adds to tractive effort in the curve.
Most of the US railroads now use stick lubrication on the locomotive trucks. Years ago it was a grease in a pressurized tank with lines and nozzles to the sander mountings on the locomotive. Messy as " California " noted. This was done to reduce flange wear on the wheel and wear on the inside of the rail.
There is a class "c" wheel, which has has a higher brinell number, that are some time's used in switching locomotives. The switching loco's generally work yards with numerous curves.
Last note is that there are "steerable 3 axle locomotive trucks". Axles 1 and 3 are connected thru linkages and they " yaw in concert " when going thru a curve. This design minimized the wheel and rail wear and adds to tractive effort in the curve.