by Peter W. Meek
» Sat Feb 06, 2010 5:04 pm
They are proposing cork as a replacement for things like plastic foam, honey-comb metals and plastics, light woods like balsa.
All these things are used to preserve the shape of a very thin film of composite material (Carbon-fiber/resin, Kevlar(TM)*/resin, even fiberglass/resin). The core material merely needs to be somewhat crushproof, and preferably very light. There is always a problem that water can get into the core material, so it is preferable that it not be subject to rot, and not subject to absorbing much water. Most traditional non-organic cores are either very expensive, or are very resource-hungry. Most organic cores are subject to rot. Cork seems to me like a good material to investigate for cores. Renewable, rot-resistant, but maybe a bit too springy.
--Pete
(Sesquipedalian Man)