Fw: [TowerTalk] Crankup Failure
d.dimitry
d.dimitry@mci2000.com
Sat, 14 Nov 1998 12:55:04 -0600
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You wrote:
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I have used a crank up for 30 years now and have been involved with =
several other installs. The main reasons for crank ups to fail are:
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1. wire rope starts to get snags and lose strength. See a snag =
replace the rope.
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Overkill in winch, clamps, and rope size are just more insurance.
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Dave K4JRB
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My reply:
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This is simply not true. In fact, it would be foolish, expensive =
and even dangerous to follow this advice. It is especially important =
that the size of your wire rope and related components be not too small, =
not too large, but just right. Oversizing is only going to cause more =
problems. The dynamics of cable wear and longevity is involved here. =
Each size cable has specific characteristics under certain conditions =
and parameters. Change those parameters, and you need to change the =
cable, and vice versa. That's all I'm explaining for now. I'll leave =
it up to a very sharp subscriber to pick the clues and take this thread =
up to more definate detail. "Preciseness is a niceness." (How's that =
for a catchy phrase.)=20
=20
DrakeDimitry@HeightsTowers.com
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style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: =
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<DIV><FONT face=3DArial size=3D2><FONT size=3D3>You =
wrote:</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><FONT =
size=3D3></FONT><BR> </DIV></FONT>
<DIV><FONT color=3D#000000 face=3D"Courier New">I have used a crank =
up for 30=20
years now and have been involved with several other installs. =
The main=20
reasons for crank ups to fail are:</FONT></DIV>
<DIV><FONT color=3D#000000 face=3D"Courier New"></FONT> </DIV>
<DIV><FONT color=3D#000000 face=3D"Courier New">1. wire rope =
starts to get=20
snags and lose strength. See a snag replace the =
rope.</FONT></DIV>
<DIV><FONT color=3D#000000 face=3D"Courier New"></FONT> </DIV>
<DIV> </DIV>
<DIV><FONT face=3D"Courier New">Overkill in winch, clamps, and rope =
size are=20
just more insurance.</FONT></DIV>
<DIV><FONT face=3D"Courier New"></FONT> </DIV>
<DIV><FONT face=3D"Courier New">Dave K4JRB</FONT></DIV>
<DIV><FONT face=3D"Courier New"></FONT> </DIV>
<DIV> </DIV>
<DIV>My reply:</DIV>
<DIV> </DIV>
<DIV>This is simply not true. In fact, it would be foolish, =
expensive=20
and even dangerous to follow this advice. It is especially =
important=20
that the size of your wire rope and related components be not too =
small, not=20
too large, but just right. Oversizing is only going to cause =
more=20
problems. The dynamics of cable wear and longevity is involved =
here. Each size cable has specific characteristics under =
certain=20
conditions and parameters. Change those parameters, and you =
need to=20
change the cable, and vice versa. That's all I'm explaining =
for=20
now. I'll leave it up to a very sharp subscriber =
to pick=20
the clues and take this thread up to more definate detail. =20
"Preciseness is a niceness." (How's that for a catchy =
phrase.)=20
</DIV>
<DIV> </DIV>
<DIV><A=20
=
href=3D"mailto:DrakeDimitry@HeightsTowers.com">DrakeDimitry@HeightsTowers=
.com</A></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 face=3D"Courier New"></FONT> </DIV>
<DIV><FONT color=3D#000000 face=3D"Courier New"> =20
</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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