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Semi-trailer aerodynamic devices are devices affixed to semi-trailers, for the purpose of reducing aerodynamic drag caused by air turbulence. The two major types of device in use are trailer skirts (or side skirts ), affixed to the underside of trailers, and trailer tails (or boat tails , or rear fairings ), affixed to the rear.
Oceanbird is a concept for wind-powered cargo vessels under development by Wallenius Marine.The concept aims to lower emissions by up to 90 percent [1] [2] and the design was developed in collaboration with KTH Royal Institute of Technology and Swedish maritime technology company SSPA.
The insulation in the windward and leeward walls is behaving dynamically in the contra-flux mode with U-values of 0.0008 W/(m 2 K) and 0.1 W/(m 2 K) respectively. Since the building has a square footprint the average U-value for the walls is 0.1252 W/m 2 K. For other wind speeds and directions, the U-values will be different.
A Cargill-chartered cargo ship fitted with giant, steel sails has set out on its maiden voyage. Wind-powered cargo ship sets sail in a move to make shipping greener Skip to main content
FEMA trailers are manufactured from plastic, aluminum, and particle board, and are therefore somewhat flimsy and require more maintenance than a permanent structure. They are also poorly insulated, offer little sound insulation, and are known to sway in high winds. [20]
Ben Hur trailer was the nickname of the World War II U.S. Army Trailer, 1-ton payload, 2-wheel, cargo, and the Trailer, 1-ton payload, 2-wheel, water tank, 250 gallon ( U.S. Army Ordnance Corps Supply catalogue designations G-518 and G-527 respectively).