Sun 04 Jul, 2021 2:22 pm
Thu 29 Jul, 2021 10:00 pm
Fri 30 Jul, 2021 11:08 am
Tue 03 Aug, 2021 11:09 am
Orion wrote:It sounds like crazy question, can a fabric without waterproof coating be waterproof. But it may well be the case that the DWR coating will serve to repel rain, up to a point. And only as long as the DWR lasts.
You don't even need to get too scientific about it. Take a big square of fabric, gather it so that you have a kind of bag, then fill that "bag" with water. Observe.
Tue 03 Aug, 2021 11:48 am
Tue 03 Aug, 2021 6:44 pm
Moondog55 wrote:Not waterproof but unproofed fabric can shed water.
Parachutes are very LW and the old style were relatively porous compared to modern stuff and could be used to make highly water resistant emergency tents in the tipi style.
It was a combination of steep walls and at least 2 layers of fabric well separated that allowed such structures to work.
Ditto early tents
Not sure that helps tho
Tue 03 Aug, 2021 9:14 pm
Thu 30 Sep, 2021 7:07 pm
Orion wrote:For sure there are stupid questions. I'm not saying your idea has no merit, simply that you have little hope of achieving a high degree of waterproofness. You already know the fabric sheds rain to a certain extent. My non-scientific suggestion was simply an easy way to test the limits.
My partner's pack cover wetted through during a recent storm. Back home it appeared to shed water just fine. But the bag test showed that under stress it leaked like a sieve. It was still fine for light rain but worthless in more serious weather. We replaced it.
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