Forces on sails to stay within the limitations of a craft's stability and power requirements, which are functions of hull (for boats) or chassis (for land craft) design. Sails derive power from wind that varies in time and with height above the surface. In order to do so, they are designed to adjust to the wind force for various points of sail. Both their design and method for control include means to match their lift and drag capabilities to the available apparent wind, by changing surface area, angle of attack, and curvature. Wind speed increases with height above the surface; at the same
Red Sails in the Sunset (album) not only the "Australian" band of the '80s, it may very well be "the" band of the '80s. Period." Album is credited to: Red Sails in the Sunset (album) Red Sails in the Sunset is the fifth studio album by Australian group Midnight Oil which was released in October 1984 under the Columbia Records label. It was recorded and produced in Tokyo, Japan and is significant for becoming their first No. 1 album in Australia – it also entered the United States "Billboard" 200. The cover image, by Japanese artist Tsunehisa Kimura, depicts Sydney Harbour after a hypothetical nuclear strike.