On Mon, 2 Sep 2002 "Julio Peralta" <firstname.lastname@example.org> writes:
> Why do you say to put up to 10' of mast inside the tower. It seems to
> me to be a waste of mast.
A long mast above the top of a tower creates a BENDING MOMENT
in the upper section of the tower that is transmitted throughout the
I have seen installations with 18 feet of mast above the tower and
only 2 ft inside the tower, creating a 9:1 lever arm working against
the top of the tower. This worries me. I 'feel' a lot more comfortable
with at least 1/3 of the mast inside the tower.
On Rohn 25, it is difficult (but not impossible) to put a rotor in the
middle of a section. It is easier to place the rotor on a plate at
the top of the next section down (and cut one of the horizontal
braces at the bottom of the Top Section if necessary). I agree,
this does 'waste' some of your heavy and expensive mast.
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