Hi Roger,
Thanks for the detailed comments. It has been a while since the last time I read and printed your article about when things go wrong, so had forgotten about the frayed spectra. I also was not aware that you use a shorter pole at the rear, as all the pictures I saw showed only several elbowed poles about the same size. I did read your tunnel tent article, and was aware of how you pitch the tent without assistance. However, IMO the links you provided are also very beneficial for other readers whether they choose a factory made tent or make their own.
It is not possible to adequately respond to your detailed post without going beyond both the forum and the thread subject, so apologize to all those with concerns about respecting boundaries. However, I did not believe that your last post on this thread could be fairly addressed without considerable detail, and after trying other approaches, feel that this was by far the best place to do it.
I should note that in mountainous areas in the USA, I’ve often seen the wind shift more than 45 degrees, sometimes l80 degrees. But not within the few minutes that it takes to pitch a good tent, so that should not be a pitching problem in all but the most unusual circumstances. The problem arises when the wind shifts after the pitch, and this requires that all four sides of the tent be as resistant to wind as possible.
Since I’m building a ‘side entry’ solo tent, I originally planned to have a one-stake vestibule and entrance, one such vestibule on each side. But after recently exchanging posts with you, I was influenced to make each vestibule have 2 stakes, with each side of the vestibule being a pullout running from one of the two peaks to the ground, as in some of your photos on other recent threads; and the center between the pullouts being for a one-zipper door that will run vertically straight from under the peak vent to just above the ground. Rather than use water resistant zippers that are difficult to operate one-handed, they will be #3 Warmlite zippers that are stronger than the generic #3, weigh only .02 oz more per running foot, and will be protected on the inner and outer by narrow flaps. I’ve found the double flaps keep the water out of vestibules in heavy rain, so long as the front wall of the vestibule is vertical enough to shed water. There is a trade-off between more vertical to keep the rain out, and less vertical to shed winds.
It was suggested on another thread that the tent also have guy loops or D-rings at both peaks to guy out for windy conditions. I agree, and there is nil weight penalty for adding small D-rings at each of the two peaks for additional guying. The elbows at the peaks will be attached to the poles of course, and the rings attached to the elbows to assure firm connections between poles and guy-outs. Since the tent is intended to be protected in all directions, there would be 4 guys, two from each peak, projecting in four directions at 45 degree angles to the floor plan.
Where we part, is on the question of outer pole sleeves supporting all the poles.
This is a bit clumsy for a double cross pole tent, and it intensifies the construction work. More importantly, the original concept of the tent was to bow the double cross poles so they would stretch the walls on the bias to a convex shape and create a partial dome that substantially increases elbow room and combats temp and humidity caused sagging nylon, even with partial PU coating. So the outer tent wall must be of one piece, without sleeves sewn at various angles. This should also improve water resistance if using SUL nylon, like the Rockywoods 7D. Reinforced pole clips can be used on the inner wall to lift it into the partial dome shape.
I did look at using polyester to address the sagging issue. The lightest I’ve seen with ripstop threads, mini or regular, is the 20D fabric on Dan Durston’s tent. The better RBTR offering is 1.4 oz/sq/yd. May eventually end up there, but first want to try a 7D ripstop nylon outer and 20D ripstop nylon inner, both being sub one oz. (The latter is now out of stock, but Xtrem-textil now has a ripstop 10D that is also sub one oz and a ripstop nylon Pertex Quantum that is below 1.1 oz/sq/yd) Bottom line, I don’t think polyester fabric light enough to bring the weight of the tent below 2 lb. has the the desired strength and durability. This issue has been discussed at length on the forums, and there are a range of opinions. I think the sagging issue is a serious flaw with conventional nylon tents, and must be addressed somehow, but not at the expense of strength, durability and light weight.
After my last post, realized the difference of the seasons in the US and AU, so note that winter here in NH is only around 4 months away, although many here do not like to dwell on this much in the middle of summer.