Teaching Energy Workshop: Field Trip Photo Gallery Click any
photo to enlarge. Information about this field trip Photos by
Karin Kirk A row of wind turbines at the Seven Mile Hill wind
farm near Medicine Bow, WY. This wind farm has 73, 1.5 MW
turbines, manufactured by GE. Turbine construction is complete,
but some land reclamation work still remains to be done. Group
photo of field trip participants. It was hard to stop taking
pictures of the turbines and the scenery. Group discussions
about wind power. It's most efficient to align the turbines in
rows. If topography and the wind regime allow it, the side-to-
side spacing is 4 rotor diameters between each turbine, with a
front-to-back spacing of 12 rotor diameters. The blades spin up
to 14-20 rpm, and the tips of the blades can travel up to 200
mph. The surrounding geology was noteworthy too. There were many
impromptu discussions about wind energy and the construction of
the wind farm. Machinery used to operate a drag line at a coal
mine near Hanna, WY. The dr