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CMLU - Containers Marine Lines (Division of American Export Lines) CMLX - Craggy Mountain Line, Inc. CMLZ - Containers Marine Lines Isbrandtsen; CMMU - Medcontainers; CMO - Chicago, St. Paul, Minneapolis and Omaha Railway; Chicago and North Western Railway; Union Pacific Railroad; CMPA - Madison Railroad Division of City of Madison Port Authority
A flanged wheel on a locomotive. Both trams and trains have flanged steel wheels with a horizontal section transferring the vehicle weight to the rail and a vertical flange "inboard" to guide the vehicle along the rail using its inside edge.
In steel shipbuilding, the entire frame can be formed in one piece by rivetting or welding sections; in this case the floor remains a separate piece, joining the frame on each side to the keel. Frame numbers are the numerical values given to the frames.
Radial-spoked wheels, where the spokes do not cross each other, saves roughly the weight of two spokes (because the spokes are shorter) compared to a three-cross wheel but run an increased risk of cracking at the hub flange, unless the hub is specifically designed for this pattern.
Some rubber-tyred metros feature special wheelsets with rubber tyres outside of deep-flanged steel wheels, which guide the bogie through standard railroad switches and keep the train from derailing if a tyre deflates. The system was originally conceived by Michelin for the Paris Métro; the first line opened in 1956.
Custom wheel spinners for custom wheels then came about in the late 1990s and got extremely popular in the new millennium. The popularity has even grown further by the introduction of larger wheel and spinner diameters such as 18" / 20" / 22" / 24" / 26" and even up to 30" inch wheels diameters.
The interaction between wheel and rail is a specialized subject covering the design and management of the high stresses in the small contact area between a steel wheel and a steel rail. The focus is on safety improvement, maintenance and replacement costs reduction, downtime reduction, and energy and environmental management.
The Shetland ferry, MV Bigga, in its cradle "Cradle" may refer to the whole rig or sometimes each section of it. The cradle may be fixed to the dock floor, relying on the tides or a dry dock to drain it, or be equipped with wheels, running on an inclined track to allow the ship to be moved out of the water to a dry parking area.