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
Lead Sails Paper Anchor Lead Sails Paper Anchor Lead Sails Paper Anchor is the fourth studio album by Atreyu. It is the band's first release with Hollywood Records, and the album had a significantly different sound to it than their previous albums, moving away from a metalcore-type sound, for the most part. The album was released on August 28, 2007. The first single was "Becoming the Bull." A single for "Becoming the Bull" was released exclusively in Hot Topic on July 24 and it included a demo of the song "Can't Happen Here". The album debuted at #8 on the "Billboard" 200. "Doomsday" was