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David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "Squirt Part VI: tip shape"
 

Summary: David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES
"Squirt Part VI: tip shape"
Note: Supporting narrated video (NV) demonstrations, high-speed video (HSV) clips, and
technical proofs (TP), and all of my past articles, 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 sixth 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, techniques for compensating one's aim for squirt, and low-squirt cues. 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