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
In the Wake of the Wind New Age chart and received a Grammy nomination. The track "Morning Sun on the Sails" is dedicated to Aaron Copland. Also, the first track on the album "Papillon (On the Wings of the Butterfly)" plays once every twenty minutes in the loop of songs played at Innoventions Plaza at Walt Disney World's Epcot. The Glassmen Drum and Bugle Corps, from Toledo, Ohio performed arrangements of Overture, Morning Sun on the Sails, The Lion's Breath, and Sailing as part of their 1993 field show for Drum Corps International, entitled, "A Voyage Through Imagination." In the Wake of the Wind In the