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David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "Squirt Part V: low-squirt cues"
 

Summary: David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES
"Squirt Part V: low-squirt cues"
Note: Supporting narrated video (NV) demonstrations, high-speed video (HSV) clips, and
technical proofs (TP) can be accessed and viewed online at billiards.colostate.edu. The
reference numbers used in the article help you locate the resources on the website. If you
have a slow or inconvenient Internet connection, you might want to view the resources
from a CD-ROM or DVD. See the website for details.
This is the fifth article in my series dealing with "squirt." So far, we have looked at basic
terminology, the physics behind squirt, some experimental results, the effects of follow and draw
on squirt and swerve, and techniques for compensating one's aim for squirt. To refresh your
memory, squirt, also called deflection, refers to the angular change in the initial cue ball (CB)
direction due to an off-center hit. In other words, when you use English, the CB doesn't go where
you are aiming because of squirt. For more background information, see my August '07 article
and refer to NV 4.13 and NV A.17. When using English, it is also important to be aware of the
effects of swerve (see NV 4.14 and NV 7.12) and throw (see NV 4.15, NV 4.16, NV A.21, and
my August '06 through July '07 articles). Sometimes, the phrase "effective squirt" or the term
"squerve" is used to refer to the net effect of both squirt and swerve on the shift in the CB
position at object ball (OB) impact (see my August '07 article for more information). If you want to
refer back to any of my past articles, they are all available on my website
(billiards.colostate.edu).

  

Source: Alciatore, David G. - Department of Mechanical Engineering, Colorado State University

 

Collections: Engineering