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Originally Posted by Theo Well, you had better results than I did. And I even added greens to the still for more moisture. Personally, I don't think they are worth the energy to make. Not enough return for the effort. Kind of like using a corn chip to light a fire. It can be done but it would do you more good as food than tinder. |
I totally agree. I was lucky enough to have very damp soil when we made our stills, unlike one usually finds in the desert.
I know people all talk about how much water you loose when constructing a solar still but I didn’t seem to have that problem. Of course it may have been different if I had not thought to bring a twangy headed Scottish girlfriend with her favorite shovel. I could not imagine doing this by hand or with a digging stick.
Some time after that I came across a book that I like among that genre of books, David Alloway’s Desert Survival Skills. His area of operation was Big Bend and the Chihuahuan Desert. He takes as dim a view on solar stills as you and I do. He calls them a cult item in survival lore. He used to make all of his students build one just to show the high failure rate in normal conditions, a side that the books don’t deal with sufficiently. The normal yield was one cup over a full day. Some didn’t give any water at all.
He did have a very interesting piece of information on estimated survival time and labor. Physiology of Man in the Desert by E. F. Adolph illustrates temperature, physical exertion and dehydration. A person at complete rest in 100 degree temperatures in the shade has an expected survival of 9.5 days with 10 quarts of water. A person with the same water and in the same temperatures who walks at night until exhausted and rests in the shade in the day cuts their survival time to 5.5 days.
You really don’t want to loose any water to labor if you have a choice.
And how many times have we seen anyone on those survival TV shows making a solar still. I have one time. I think it was Ray Mears in Arizona. He didn’t get a drop out of his. It was a total disaster. I have not seen anyone try it since. Has anyone else seen this done on one of the survival TV shows? I have only seen a few episodes of this kind of thing so I very well could have missed it but even with shows where they can’t find a water source, I have not seen anyone after Ray do this.
So this thread is about real world experience over just taking what the books and TV shows tell us? Some things are learned by experience that you just don't get from a book…
10 Gauge Double Barrel Shotgun (TWO bullets in) vs Me .. 110lbs - YouTube In this decayed hole among the mountains
In the faint moonlight, the grass is singing
Over the tumbled graves
--T. S. Eliot