Perhaps
others have developed the concept of using a sail on land to generate
electrical power, I don't know. Yet because the thought occurred to
me I write a note about it here in order to let others research or
develop that concept.
Fundamentally
one can catch a lot more wind with a large square sail than with the
much smaller surfaces of propeller-like blades. People have let wind
provide the mechanical moving energy directly for centuries instead
of using an indirect means to directly convert a large area of
a sail to mechanical and eventually via an alternator- electric
power.
The
larger the the more force would be exerted upon it in a wind. There
would be two masts on a turntable connected at the corners to a
tensioned line and various reduction gears that would turn an
alternator via the extreme force on the tensioned connector cables.
The
tensioned cables could be spring-loaded, or they might compress
in-line elements connected to reduction gears, or they could be
fashioned in numerous configurations such as around pulleys and with
compressible springs etc.
A
strong point about land sails for generating electric power would be
the low cost of sails as well as low maintenance and installation
costs. probably someone thought of tying sails into mechanical
systems before, yet I don't want to fail to note the concept anyway.