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Double-Rail Position — Setup and controlled practice

White and yellow start close together on the left, while red is far to the right. The nearby first contact makes this a useful layout for studying how thickness changes the departure before a longer route.

Author: Setviva Engineering 253 words 2 min read

White and yellow start close together on the left, while red is far to the right. The nearby first contact makes this a useful layout for studying how thickness changes the departure before a longer route.

Actual starting layout

Ball centres on the 2.84 × 1.42 m reference table. The link loads this layout with white as the cue ball; it does not play a scoring shot. Coordinates start at the lower-left corner.

Actual starting layoutWhiteYellowRed
Ball coordinates · cm
Ball coordinates · cmxy
White5571
Yellow6581
Red25071

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What to compare

Choose a first contact and follow each cushion in order. If a route revisits a cushion, count actual contacts before the second object ball; the name does not itself supply three contacts. Compare contact thickness at fixed spin and pace.

Record a baseline, restore the same layout and change one control. Record the first contact, cushion order, any unintended ball collision and final arrival. Keep the speed fixed when comparing side spin; keep the spin fixed when comparing speed.

How to interpret the result

Two contacts with one cushion are not a complete three-cushion score by themselves. If the nearby object ball returns into the cue-ball path, record the collision timing separately from a short final arrival.

A three-cushion point requires both object balls and at least three cushion contacts before the second object ball. A preset name is not a certified scoring route. Compare model results with your own table; no universal hit rate or player endorsement is claimed.

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