(c) On NG tracks, 0.02% per degree of curve or 35/R, whichever is minimum where R is the radius of the curve in metres.
What is the reason of compensation of gradient on curves?
8. What is the reason of compensation of Gradient on curves? Explanation: On curves the locomotive experiences extra resistance to its movement. Thus gradients on a curve should be flatter because more resistance can cause uncomfortable journey.
What is maximum value of grade compensation?
According to IRC, a grade compensation of, (30+R/R), maximum 75/R has to be provided for the grades more than 4%. No grade compensation is required for the lower values of the the grade.
What is grade compensation and why is it necessary?
Answer: Grade compensation in curvature is provided to off-load the extra resistance due to to curvature. Compensation in BG is 0.04% per degree of curvature. So while providing/fixing the gradient in a curvature care is to be taken for compensation.
What is the allowable limit of grade compensation on curve for BG track?
The compensation to be allowed should ordinarily be 70/R percent. (0.04 percent per degree of curvature) for Broad Gauge, 52.5/R per cent (0.03 percent per degree of curvature) for Metre Gauge and 35/R per cent (0.02 per cent per degree of curvature) for Narrow Gauge(762 mm.)
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.
How do you find the compensated gradient?
If ruling gradient is 1 in 20 and there is also a horizontal curve of radius 76 m then the compensate grade should be
- Grade Compensation is (30+R)/R %
- Hence 75/76=0.986%.
- Hence Compensated gradient on the curve is 4% = 1 in 25.
