Standard drawing method for lead courts (schematics)
Basic overview of the venue:
The lead course ground is one of the field racing facilities. It consists of a throwing circle, a limit line, a stop board, and a landing area. The throwing circle is circled with a 2.135 m diameter circle with a 0.6 cm thick iron plate, steel plate or other material and painted white. The floor of the ring is paved with concrete, asphalt or other hard, non-slip material.
Standard size of the venue:
The limit line is 75cm long and 5cm wide on both sides of the throwing circle. The white trailing edge passes through the extension line of the circle center and is perpendicular to the centerline of the falling area. The toe board is made of wood or other material and painted white. It is installed in the middle position between the two white lines in the landing area and is fixed on the ground. Its inner edge coincides with the inner edge of the throwing ring. The area is paved with cinders, grass or other material that can leave the mark of landing ball and marked with two white angle lines with a width of 5cm. The line width does not include the effective area of ​​the falling area. The inner edge of the angle line extends through the throw. Circle center, angle 34.92 °. The downward slope of the ground in the direction of throwing in the falling area exceeded 1:1000. Place a distance sign every lm on the outside of the two angle lines. The shot angle of the shot putter should be 34.92°.
Lead course drawing:
The effective area for throwing a shot put is a fan-shaped scene of 400. The angle line width of 5 cm is not within 400 angstroms, and the tilt slope of the throwing direction toward the throwing direction must not exceed one thousandth.
(1) Draw the shot throwing circle with a center point of 0 and a radius of 1.0675.
(2) Determine the direction in which the shot put forward and draw the circle AB of the throwing circle, extending 75 cm from the A and B points to the circle.
(3) Make a longitudinal axis OE perpendicular to the diameter, take a point F 10 meters away from the longitudinal axis, and use the point F as the vertical CD of OE so that CF = DF = 30.64 meters.
(4) Connect OC and OD and lengthen, then ∠COD=400, constitute a shot throw fan-shaped effective throwing area.
Related Reading:
"Introduction to Lead Shot Skills and Action Essentials"
"A brief introduction to shot put"
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