who makes a parabolic cue

SwissChris

SwissChris

AzB Silver Member
Silver Member
Who still makes a parabolic cue .....I know Black Boar .....who else ?:thumbup:

Thanks Chris
 
Hi,

I do.

My butt and shaft tapers are both parabolic but are different geometries.

Shaft is a shaft specific parabolic curve from the joint to + 14.5" then a modern pro taper style drop to the tip.

Butt is a butt specific parabolic curve from butt to the A Joint and then a straight conical to the nose.

Both compound tapers.

Rick
 
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JoeyInCali said:
Technically, I think nobody does .
Click to expand...

In cue making people refer to different items with terms that may be ambiguous as I would agree. Pro taper, super pro taper, conical, modern pro taper and parabolic are generalities but most people understand that each of these terms only refer to a general understanding of visual description. Not pure math per se to say the least.

The parabolic curve is function of only one half or side of a plotted parabola. This is referred to by many as a parabolic curve. A cue maker can distort this curve to his liking to establish his own bend to the brim for purposes of beta testing his shaft or butt tapers until he finds what he wants.

Anyone who has done this drill soon realizes at some point in the length the taper must become a compound taper to accommodate the bridge and desired tip a ferrule sizes. Once this has been achieved at a standard 13 mm end size, by pivoting the taper bar on a point at the end of the bar closest to the tip side, one can create a shaft end at any size he wishes while maintaining the same joint size utilizing a compound taper with a parabolic curve built into the joint side of the shaft or butt and ending into the compound transition.

The joint and tip size can then be duplicated at any time by logging this this exact micrometer pivot change differential + or -. The same taperbar will slightly change both geometries of the compound and each shaft size will be unique unto itself.

In 29 inches a compound or transition is needed in a design or the tip would be too tiny to play pool with if the joint is around .850. Since the primary directive is let's say, shaft taper design is to "never have parallel lines" then there is a point where the parabolic curve must somehow meld into a proper drop and a climb must be established for the play ability desired. Nothing is in stone. Cue making is an art as well as a science.

Again to utilize the so called Parabolic Taper in cue design one must have a compound.

Here is an interesting show case that illustrates how straight lines may be used to create Parabolic curves in art forms.

http://mathcraft.wonderhowto.com/how-to/create-parabolic-curves-using-straight-lines-0131301/

Rick
 
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Modern cad programs can draw Parabolic curves which can be Gcoded to have the template made at or by your friendly CNC tech.
But Joey is right, little curves or a variety of arc lines ,is still just lines. Does it really matter when it has been sanded etc ?
I will get my popcorn also,
Neil
 
I don't understand the interest in "parabolic" tapers. It seems to me that a hyperbolic cosine taper, a catenary curve, would be much more natural.

Dave
 
DaveK said:
I don't understand the interest in "parabolic" tapers. It seems to me that a hyperbolic cosine taper, a catenary curve, would be much more natural.

Dave
Click to expand...
Dave,
It has to do with the way a parabola reflects or focuses wave forms. A parabolic mirror, for example, is used in solar applications because it reflects all incoming sunlight waves to the focus point. On the other hand, if you place a light bulb at the focus point, the rays are reflected out in a parallel cone (well, more or less), as in a flashlight.
So, the same kind of transmission is supposedly achieved with the reflections in a wood cue when you hit a cue ball.

Now, some others have argued that you can't form a true parabola with G-code, only an approximation, and hence the theory breaks down.

At least, that is my take on it, as this has been discussed more than once in the past.
Any other interpretations guys?

Gary
 
GBCues said:
Dave,
It has to do with the way a parabola reflects or focuses wave forms. A parabolic mirror, for example, is used in solar applications because it reflects all incoming sunlight waves to the focus point. On the other hand, if you place a light bulb at the focus point, the rays are reflected out in a parallel cone (well, more or less), as in a flashlight.
So, the same kind of transmission is supposedly achieved with the reflections in a wood cue when you hit a cue ball.

Now, some others have argued that you can't form a true parabola with G-code, only an approximation, and hence the theory breaks down.

At least, that is my take on it, as this has been discussed more than once in the past.
Any other interpretations guys?

Gary
Click to expand...

I understand conic sections .... way too much math in electrical engineering. But catenary curves are more natural and it would seem to me they are a better choice than a parabola. That is why I made the comment.

A chain hanging between two points creates a catenary. The chain is in pure tension, no shear forces. Again it seems to me that a curve that aligns itself such that it simplifies the stresses would be a good choice for a stick that hits balls.

Dave
 
Paul Dayton said:
If you're making a dish to send and receive microwaves, a parabolic antenna would be great but it is hype and bull#### here.
Click to expand...


Hi,

A parabolic function is only one half or one side of a plotted parabola. This is referred to by many as a parabolic curve. A cue maker can use a portion of this curve to his liking to establish a segmented parabolic profile as part of a total compound taper of a butt or a shaft.

Of coarse this would be plotted points that would be joined to form a quantized contour curve using the straight line segments. There is no "Ta Da" magic or revaluation going on here it is plain geometry which is easily translated from Cad to G Code as no big deal.

This is mathematics not mysticism or BS.



With just a little imagination one can look at half of this geometry and see a shaft contour that has a flange like trumpet shape projecting towards the shaft joint or butt of the cue element.




Antenna dishes and cue making contour design have very little to do with each other.
The real parabolic antenna's construction has a conical form NOT PARABOLIC shape! The use of the word parabolic is just a term in this case and does not reflect the geometry of the dish itself. It refers however to the projected beams from the dish.





Note below that the outside contour of the projected beams resemble one side of the graphing above if one plots the straight lines to graph a curve.

Parabolic radiation pattern:





The cue's feed back to a player concerning the use of these geometries in cue construction is subjective of coarse and is something that each person must evaluate for themselves concerning their personal stroke. There is no one size fits all or a panacea where tapers are concerned.


But of coarse this is JUST MY HUMBLE OPINION!!!!!!


Rick
 
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