Petrel Play forms

Submitted byJohn W. onTue, 12/22/2020 - 05:30

I am cutting the forms for a strip built Petrel Play. I've made 7 previous kayaks, always using an external strongback. The bow and stern PP forms have long extensions designed to run along an internal strongback. Is there any purpose for these extensions when using an external strongback?

John

those extensions define the bow and stern lines (from typically the second to last forms on each end) and provide the anchor to whitch you would attach the strips coming from each side to form the bow and stern in the correct shape.  so even with an external strong back, you need these pieces held in the proper position....or you would have no way of knowing how to bring the strips of each side together to form the bow and stern per the designer's lines.

that said, if you are doing an external strong back, you might need to tweak these pieces in a way that allows you to properly anchor them in the correct position becuase the design will assume you are using an internal strong back.   but the general outline of these pieces - top, front, bottom...need to be preserved.

those extensions define the bow and stern lines (from typically the second to last forms on each end) and provide the anchor to whitch you would attach the strips coming from each side to form the bow and stern in the correct shape.  so even with an external strong back, you need these pieces held in the proper position....or you would have no way of knowing how to bring the strips of each side together to form the bow and stern per the designer's lines.

that said, if you are doing an external strong back, you might need to tweak these pieces in a way that allows you to properly anchor them in the correct position becuase the design will assume you are using an internal strong back.   but the general outline of these pieces - top, front, bottom...need to be preserved.

those extensions define the bow and stern lines (from typically the second to last forms on each end) and provide the anchor to whitch you would attach the strips coming from each side to form the bow and stern in the correct shape.  so even with an external strong back, you need these pieces held in the proper position....or you would have no way of knowing how to bring the strips of each side together to form the bow and stern per the designer's lines.

that said, if you are doing an external strong back, you might need to tweak these pieces in a way that allows you to properly anchor them in the correct position becuase the design will assume you are using an internal strong back.   but the general outline of these pieces - top, front, bottom...need to be preserved.

you need these extensions in order to have a proper reference to attach the strips coming from each side to form the bow and stern....otherwise you would kind of be guessing how to get the bow and stern executed per the designer's lines.

you can still build with an external strongback. but you will need to tweak these pieces so that they can be held properly to your external reference point....but the basic shape (top, bottom, front) needs to be preserved in proper reference to your other forms.

h