As the thread title suggests I'm wondering what sort of angle to aim for when sewing in attachment points for an internal pole mode.
I'm going for a dual pole mod on a version of Kitsapcowbow's Badlander tarp so I've got each of the four corners as the bottom end points of the poles and I plan to sew in a couple of tie-in loops into the ridgeline. His pattern has a ridgeline 133" long with the corners 31" in from the ends (there's a diagram he posted on the Badlander thread) so if the poles were to sit at right-angles to the ridgeline I'd fix the loops there but that position isn't stable so I'm thinking of moving them towards the centre of the tarp but by how much?
I'm not constrained by any length of the poles so can go with any realistic value. One "solution" might be to have the loops at the 1/3rd and 2/3rd points, i.e at 44" & 88" which would mean that the poles angle towards the centre of the ridgeline by about 13 degrees and adds about 4" to the pole length (if my Pythagoras is correct!). Too much or about right?
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