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General Category => Drilling & Layouts => Topic started by: killpins on July 14, 2010, 03:35:58 PM

Title: PAP question
Post by: killpins on July 14, 2010, 03:35:58 PM

Hi at all
i see this video http://www.youtube.com/watch?v=o4MqKPSYl6Q&feature=related
and it's a easy way to find the pap without a armadillo but i have a question:
on the step 4 of the video the person draw two lines perpendicular to the track and the intersection of these lines is the pap.
My question is:is there a measure (an exact point on the track) where to start to draw  the first line ?
The second line is drawn from the track through the midline of the span.
Any help is appreciated.
Thanks in advance

Title: Re: PAP question
Post by: JohnP on July 15, 2010, 10:14:48 AM

If you have the track marked correctly lines perpendicular to any spot on the track will cross at the PAP.  To get a distinct location I'd suggest using two lines about 90* apart.  --  JohnP