[TowerTalk] Quickly releasable knot
Pete Smith
n4zr at contesting.com
Mon Feb 23 15:54:24 EST 2004
This past weekend I was on a ground crew putting up two large 40m
yagis. Because the tag lines needed to be reachable from the tower, they
were attached only maybe 18 inches from the center of the boom, which made
it very hard to apply enough force on the tag lines to control the antenna
(lever arm too short).
I seem to recall reading, at one time, about a special type of knot
designed for remote untying. In a nutshell, it holds tight as long as the
"untying" force is applied through the loop formed by the knot, but a good
tug on a "pigtail" sticking out of the knot itself will cause the knot to
untie. It occurred to me that such a knot could have been used to attach
the tag lines some distance from the center of the boom, with the pigtail
taped to the boom and long enough to reach to the center, so that the tag
lines could be released when no longer needed.
Am I making this up, or does someone know the details or, perhaps, a web
site source?
73, Pete N4ZR
Check out the World HF Contest Station Database
Updated 9 Jan 04
www.pvrc.org/wcsd/wcsdsearch.htm
More information about the TowerTalk
mailing list