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What is cant deficiency in railway track?
(3) Cant deficiency- Cant deficiency occurs when a train travels around a curve at a speed higher than the equilibrium speed. It is the difference between the theoretical cant required for such higher speed and actual cant provided.
What is meant by cant deficiency?
The term “cant deficiency” is defined in the context of travel of a rail vehicle at constant speed on a constant radius curve. Cant itself is a British synonym for the superelevation of the curve, that is, the elevation of the outside rail minus the elevation of the inside rail.
What is cant deficiency in civil engineering?
Cant deficiency is the difference between the actual cant provided and equilibrium cant necessary for the maximum permissible speed on a curve. Cant deficiency should be as low as possible and is limited due to following reasons: Side wear and creep of outer rails of the track are more due to higher cant deficiency.
What are the limitations of cant deficiency?
cant deficiency limit of 3 inches is overly conservative. Conventional passenger trains could operate at 5% to 10% higher curve speeds without affecting passenger comfort or safety. Extreme cant deficiency results in curving behavior that is uncharacteristic, or outside the generally accepted scheme of curving forces.
What is the value of cant deficiency for broad gauge?
It is clear from above that maximum cant deficiency permitted for BG track is 10 cm or 100 mm.
What is cant on the railway?
The cant of a railway track or camber of a road (also referred to as superelevation, cross slope or cross fall) is the rate of change in elevation (height) between the two rails or edges.
What is the creep of rail?
Creep in rail is defined as the longitudinal movement of the rails in the track in the direction of motion of locomotives. Creep is common to all railways and its value varies from almost nothing to about 6 inches or 16cm.
What is cant and why do we need it on the railway?
On railways, cant helps a train steer around a curve, keeping the wheel flanges from touching the rails, minimizing friction, wear and rail squeal.
What is creep in railway?
What is turnouts in railway?
Railway turnout is a mechanical device that used to guide the trains from one rail track to another. As an important part in rail construction, turnout helps to enable the trafficability of the rail.
Which wood is best for railway sleepers?
wood can be divided into hardwood and softwood according to the hardness of wood texture. Hardwood railway sleepers are made chiefly from oak, beech, and hornbeam. softwood railway sleepers from Scots pine, maritime pine (Pines pinaster), and larch.