I am thinking of making a tarp, for a 3-man long distance trip in South Australia. There just doesnt seem to be anything commercially available that fits the bill and either doesnt weigh too much or cost a fortune or both.
So, I am thinking:
2 pieces of Thru-hiker spinntex 0.97 spinnaker. I already have one piece at 54inch (4.5 feet) width and 3 yard length. So I get another of the same, and stitch them lengthways together, to form ~ a 9x9 tarp, with a 9 ft ridge-seem. I like the fabric specs, the feel of it, and it could be possible to get the finished tarp down to 11oz or less...? Plus guylines and pegs...guylines might find double duty as pack compression straps for our three packs. We don't use trekking poles. We will find appropriate natural poles if they are needed.
Does anyone have any doubts about whether this is large enough for three guys? We dont mind being cramped to the max. We will have full sleeping bags, but no bivies. Chance of a night in the rain on this trip is about 1/12 for the first 4 days, and after that about 1/60. If we get slightly wet for one night, it wont bother us, though we will have down bags, backed up with a set of polypro thermals, a synthetic-fill jacket (mine will be a Thru-hiker kinsman currently under construction), socks, beanies, gloves. Rainwear will be something like a Montane Featherlite H20 Jacket; terrain will be rough and often scrubby so poncho's are out of the question. We can also use our packs as half bivies if we have to (They are water resistant nylon).
If the weather comes in, I am thinking of pitching it with a modified A-frame, with one end and a whole side on the ground, and the other end and side raised slightly, and a slight ridge. This I am thinking will give just enough room to fit us all under, and only the outer person would really have a chance of copping spray.
Any recommendations for sewing technique for the ridge, tie outs, etc? What about using glues? I think Ive seen this referenced to before on here.
I would also like to put a tie out, or two, on each panel (given its such a large tarp). I like the look of the non-sewn ones on the MLD Grace duo tarps. Any ideas here?
I like the idea now of one large tarp for the three of us (rather than multiple tarps of smaller sizes), as this minimises extraneous weight from guylines, pegs, etc, and also minimises total pitching and "camp-chore" time between the team.
Any input would be greatly appreciated.