, “. ~ .- ,_ . * -I ' REFERENCE- .? -BBRARY p ;A ~~~ect;~~~vol ...

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Wind Power Systems
of thought in the wind industry. In the first,
yo.u assemble the~towe~ron the. gro.und.and
+ilt it up. In the second, you assemb,Je
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the
towe~r from the ground up:Both ways work,
and the method you choose will ‘@‘robably
depend on the site. If you have lo,& of room
for the machinery necessary to tilt up a
tower, that’s the easier way to go. If not, you
can erect the tower strai’ght /hp; but it’ll be
more ____ ____. ..- difficult -.. ..- ._- because of -.-.-, having i _____ _ _,_,_ .-. to ._...,-. handle -.-.-....-.*.-
‘” .unsupported’-towerparts,/atop a partially
&Gm&a.d tower. zitherway, the tower must
be absolutely%tical. dtherwise, the wind-
‘.
mill, which rotates about a lo//y, or yaw, axis
(the vertical shaft that allows the windmill to
change its direction), will not aim properly
-==he=-w&@ -;I- ,
A
There are’se%%&ways
I
to hoist a wind
machine aloft/You can do it by using-ablock-and-tackle
at the top of the tower. You
-2aTT~~ piecebyppiece-&~~k
---fun, bbt a tot of exercise. Or you can lift it up
witha%& crane or hoist.
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Next you’h‘needto-itntstall the sucker rod,
which ‘drives the -$ell pump-in-its up-down
mot@. Tradi$onally &cker rods have been
m,a$e of steel or wood. Wind blows against
t$E.&‘fOhg, slender rods and causes them to
/bend. When the cyclic, tension-compression
/” loa@s of the pump and wind rotor are added,
the9 can buckle or break.
: Pumps are pistons that slide along inside
metal or plastic pipe, pulling water in through
a one-way “foot valve” and pushing it through
a pipe to the surface. Usually pumps are
installed deep in the ground. Mine is 60 feet
The reconditioned,water-pumper at the Park i-h
was carried aloft piece by piece and r&assembled
at the top of the tower.
$+a
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