Sails of Silver now sported the same line-up that had brought it to the height of its success, "Sails of Silver" has often been seen as embodying a different spirit from their classic albums of the 1970s. Prior to "Sails of Silver", the band had always performed songs written by other people, predominantly traditional songs, but also a few 20th century pieces, such as the two Brecht songs on "Storm Force Ten". But on this album they included several songs they had written themselves, including "Let Her Go Down" and "Senior Service". This was the beginning of a trend that continues down to
Forces on sails balance. Integrated over the sailing craft, the total aerodynamic force (F) is located at the centre of effort ("CE"), which is a function of the design and adjustment of the sails on a sailing craft. Similarly, the total hydrodynamic force (F) is located at the centre of lateral resistance ("CLR"), which is a function of the design of the hull and its underwater appendages (keel, rudder, foils, etc.). These two forces act in opposition to one another with F a reaction to F. Whereas ice boats and land-sailing craft resist lateral forces with their wide stance and high-friction contact with