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
Black Sails (TV series) the hurdy-gurdy. For the amount of detail that was added to the vessels, it took over 300 workers to build just one ship. In real life, recurring actor Nick Boraine is Louise Barnes's husband; Anna-Louise Plowman and Chris Larkin are, respectively, Toby Stephens's wife and brother; and Guy Paul is Harriet Walter's husband. The first season of "Black Sails" received mixed to positive reviews from critics. On Rotten Tomatoes the season holds a rating of 62%, based on 45 reviews, with an average rating of 6/10. The site's consensus reads, ""Black Sails" boasts visual appeal, but the show's bland characters