Measuring endmass??

[NY9912]

deleted - 7/25/2020

 

[Not Dead Ted]

I think you can estimate endmass if you know the pivot point. That is, if you accept Ron Shepard's work as correct.

http://billiards.colostate.edu/physics/Shepard_squirt.pdf

 

[NY9912]

deleted - 7/25/2020

 

[Tramp Steamer]

I had to stop and look twice at this thread. When you mentioned "measuring end-mass" I thought you were talking about my first wife.

 

[NY9912]

deleted - 7/25/2020

 

[jason]

...since you put it that way, a little extra end-mass isn't always such a bad thing

Thats why it is important to measure end mass, because "a little extra" can mean a lot of different things to different people!

 

[D Rock]

thanks for this very informative question and answer...it does gave me an idea on the right pivot point in applying a stroke to your cue ball.....

 

[Blue Hog ridr]

Here is something from Bob Dzuricky's site regarding ferrule weight and deflection. Don't know if thats what you were looking for but its a short interesting read anyway.

http://www.dzcues.com/ferrules-4.html

 

[dr_dave]

Is there a simple & objective way to determine the end-mass of a given shaft? I searched for this before posting but didn't really find an answer - maybe incorrect syntax.

My first thought would be to rest the tip side on a digital scale while supporting the joint side on a solid object of the same height, but I'm not really sure if or how the displayed weight would translate to the end-mass.

The easiest way is to first determine the cue's natural pivot length using the procedure described and demonstrated here:

http://billiards.colostate.edu/threads/cue.html#pivot​

The effective endmass is directly related to natural pivot length according to:

TP B.1 - Squirt angle, pivot length, and tip size​

Regards,
Dave