Rolling-Cue-Ball CAROM ANGLE Systems

Dr. Dave demonstrates several useful systems to accurately predict carom direction for rolling-CB shots. The carom angle is the amount the CB deflects off the OB. Being able to predict this is useful to detect a possible scratch, to plan break-out and carom shots, and to visualize position-play paths through “traffic.”

CORRECTIONS:
– At the 3m07s point, the line showing the predicted CB direction should have gone from the finger to the 1 ball.
– In the diagram at the 3m46s point, ​the 0.281 and 2/7 (0.286) lines were mislabeled. They should be switched. 1/4 (0.250) is less than 0.281, which is less than 2/7 (0.286).

Table of Contents:
0:00 – Intro
0:22 – 1 – 30˚ Rule Peace Sign
1:01 – 2 – Full and Thin Hits
1:39 – 3 – Rolling Carom Angle (RCA) System
3:18 – 4 – CB Line RCA
4:20 – 5 – Marked-Cue RCA
5:45 – 6 – Perpendicular RCA
6:29 – 7 – Speed Effects
7:31 – 8 – Easy Example
9:15 – 9 – Tough Example
10:37 – Wrap Up
11:32 – —- system montage

Supporting Resources:
– peace-sign angle calibration template:
– CB control video:
– Coriolis carom angle theoretical analysis:
– how to visualize the tangent line:
– where the CB goes with different shots:

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