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 Post subject: *How to draw a Dual Angle Layout, in 9 steps*
PostPosted: Thu May 12, 2011 10:28 am 

Joined: Thu Aug 27, 2009 10:43 pm
Posts: 1698
Location: Rochester NY
I have fielded several questions about dual angle layouts and how to apply them. This is intended to be a guide to show you how to draw a dual angle layout on a ball.

In this example, we draw a 40x40@4" based on a PAP of 3.75" over, .75" up.

Step 1:
Draw a line from pin to PSA on an asymmetrical, on symmetrical balls draw a line from pin to CG. Remember that the drilling angle/CG placement on a symmetrical is of little consequence to final reaction. The ball in this example is an asymmetrical.

Image

Step 2:
Place the pro sect on the ball with 0" on the measuring scale on the pin, and 0* on the protractor on the line to the PSA drawn in step 1. Be careful to use 0* and not 3*, the rib on the ProSect is offset slightly. Inspection of the protractor will show this. Make a mark to indicate the drilling angle, in this example it is 40*.

Image

Step 3:
Draw a line connecting the new mark and the pin.

Image

Step 4:
Measure along the new line the desired distance from pin to PAP, placing 0" on the pin. In this instance it is 4", make a mark. This is the PAP.

Image

Step 5
Flip the quarter scale around and place 0" on the PAP, and 0* on the line from pin to PAP. This is the most confusing, and often messed up step because you have to flip the quarter scale. Make a mark at your desired VAL angle, in this instance 40*.

Image

Step 6:
Draw a line from PAP to the mark you just made, this is the VAL.

Image


The dual angle layout is now completely drawn on the ball. We now have to work backwards to figure out where to place the holes. The PAP coordinate in this example is 3.75" over and .75" up. Therefore we need to measure .75" down from the PAP, and 3.75" over from that point to place the grip. If your axis has a down vertical measurement, then you would measure up from the PAP.


Step 7:
Draw your vertical axis measurement. In this instance it is .75" up, so we measure .75" down the VAL from the PAP and make a mark.

Image

Step 8:
Draw a line perpendicular the the VAL by placing 0" on your mark made in step 7, and 0* on the VAL. Draw a line, and make a mark at your horizontal axis measurement. In this example it is 3.75"

Image

Step 9:
Almost there. Place 0" on the mark, and 0* on the line made in step 8. Draw a line, this is the grip centerline. The intersection of these lines is the center of grip, somewhat legibly noted in the picture.
Image


This is where techniques will diverge. Some shops will draw finger cut lines, some will draw thumb cut lines, some will draw centerlines. The important part is that you now have a proper layout on the ball, 40x40@4" based on a PAP of 3.75" over and .75" up!


Any questions?


Last edited by JustinWi on Thu May 12, 2011 1:14 pm, edited 2 times in total.

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 Post subject: Re: *How to draw a Dual Angle Layout, in 9 steps*
PostPosted: Thu May 12, 2011 11:16 am 

Joined: Thu Nov 19, 2009 1:50 pm
Posts: 487
Thanks Justin.Great job.Keep up the good work.

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 Post subject: Re: *How to draw a Dual Angle Layout, in 9 steps*
PostPosted: Thu May 12, 2011 3:36 pm 

Joined: Mon Oct 11, 2010 3:58 pm
Posts: 405
Location: Countdown County FLA
You couldnt have used a PAP of 6 1/8 over x 1/4 up? jeesh!? LOL

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 Post subject: Re: *How to draw a Dual Angle Layout, in 9 steps*
PostPosted: Thu May 12, 2011 7:30 pm 

Joined: Fri Oct 30, 2009 8:23 pm
Posts: 120
Well illustrated. Thank you.


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 Post subject: Re: *How to draw a Dual Angle Layout, in 9 steps*
PostPosted: Thu May 12, 2011 9:07 pm 

Joined: Wed Sep 22, 2010 12:14 am
Posts: 804
Location: Iowa Falls, IA
This post, like the video listing archive, should be it's own category, not to be lost in the shuffle after no one posts to it.

Maybe the solution should be to start another category called "resources" that is available at the top level, and seriously scrutinized and edited by the admin, or someone appointed by the admin.

Just my 2 cents.
And no, I haven't found the cent sign on my iPad yet.

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 Post subject: Re: *How to draw a Dual Angle Layout, in 9 steps*
PostPosted: Fri May 13, 2011 6:43 am 

Joined: Thu Jul 02, 2009 4:01 pm
Posts: 526
Excellent information! Me thinks this will help those that are not familiar w/DAL understand the process better. Even if someone does not drill balls they should have a 'working' knowledge of the process to understand how it effects their ball reaction. Good Job Dr. J. !!

I also agree. Maybe a "Resourse" tab would be good for this type of info . . and it's $.035 worth ($.02 adjusted for inflation) :D

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