Typically wind is very cheaper than any fuel. Import/Export is the basic
need of every country which is usually done through sea where there is a
large wind potential. Sky Sail is a new emerging technology by virtue of
which the ship is towed by a sail. The Sky Sail System is used parallel
to and for relief of the main engine, if wind conditions allow. The main
engine's propulsion power remains fully available if required. This dual
propulsion solution offers the flexibility required to minimize
operating costs. In this book aerodynamic calculations are done using a
sky sail whose dimensions are found from historical trend to calculate
the fuel savings. Also break even points at different angle of attacks
and different wind speeds for the same sky sail are also found. By using
a Sky Sail System foresighted shipping companies now have the
opportunity to increase their competitiveness and yields.