1600 1046) that the juice of the lac tree (Rhus vernicifera), a naturally occurring polymer, could be used for forming hard but lightweight vessels when built up in very thin layers through the repeated dipping of a core of carved wood, bamboo, or cloth.
Hydroelastic phenomena play a critical role on the dynamics of lightweight marine vessels, but a comprehensive understanding of their potential benefits and drawbacks in water impact remains elusive.
But for decades adventurers have employed the lightweight and durable vessels to cross lakes, descend remote rivers or portage for miles to reach wilderness in far corners of the globe.
In early January in the icy waters off Antarctica, the steel hull of the Okinawa-registered ship Shonan Maru II ploughed into a lightweight carbon-fibre pursuit vessel used by the anti-whaling charity Sea Shepherd, shearing off the sleeping quarters.
At the time, the Navy was interested in developing lightweight, cylindrical hulls for unmanned vessels that could dive below 20,000 feet, and Mr. Stachiw had researched different composites, including ceramics, glass, and carbon.
This has the potential to lead to a selective "loading" of the reduction costs on the shipper, for example: sea freight of electronic goods (i.e., - computers and technology equipment) in container vessels are considered lightweight freight, but highly valuable.
As both the boom and the vessel are small and lightweight, the complete system could be installed close to where oil spills are likely, such as ports, and carried on oil rigs and tankers.
There is a need to design a reliable lightweight solid rocket motor case, pressure vessel for a launch vehicle or a missile system.
Hydroelastic effects are mostly important when the vessels are made with composite lightweight structures, due to the higher impact speed that can be reached.
A solution to the production of reduced pressure local vacuum is the installation of short, lightweight segments bolted to each other and the vessel wall.
