Luv the informative, retro references, Thx Aggie and Grey.
And to add to that, Amazon Prime has the Kon Tiki documentary which I recently watched. Of note, they had cardboard boxes of rations rolled in asphalt and covered in sand stored under the raft, submerged in sea water. Stayed dry and intact during their 120 day sea voyage. Unbelievable.
[quote][/quote]
GPW, appreciate looking for alternatives. Brainstorming and seeking new ways is the history of the evolution of man.
And foamies.
Some thoughts from past experience and lives.
Kraft paper and cardboard would give much stronger results.
Repulped and formed to shape readily done with water.
Key would be finding an impregnation solution and technique that is cost effective and durable.
Tar paper technique?
Simply painting or surface coating of paper would not seem to be durable over a large, exposed surface with seams and corners. Potential for cracks and seepage over time, weather and temperature cycles of expansion, contraction, water exposure.
And as Tony says, can it be accomplished cost effectively over present methods such as fiberglass?
And while we're at it, any other surface coating materials and methods possible which could be cost effective?
Problem is most (all?) chemical solution coatings tend to be expensive. Simply reducing the cost of a bulk filler material might not be enough if you still need an expensive binder coating for good impermeability and UV resistance.
Collecting pine tar in the forest?
Homemade binder?
PMF over wood as a protective layer works. Necessary over xps foam? Thinking a surface coating for UV resistance would be sufficient. Cheaper rhinoliner type coating?
But if one looks at the cost of the skinning materials vs the overall build time and cost, how much of a gain would it be?
Food for thought.
Aggies article shows it can be done in war time as replacement. How cost effective today and the materials + method are the questions of the challenge initiated by GPW?