[TowerTalk] Need a Knot Expert

[Gedas]

Hi Wes and TU. I am not sure I am positive what you mean by only a load 
on the upper side of the knot.

I am going to have two pulleys, one at the top of the tower and one at 
the bottom. I am going to have a single long rope threaded around both 
pulleys and I am going to use a fisherman's knot or similar to tie the 
two together nice and tight. Not going to be much tension in the rope at 
this point, maybe 10 pounds just to keep both sides of the line nice and 
tight with no slop.

Now, I was hoping for a single knot that not only joined the two ends of 
the rope together but that also left me with an open loop so I could 
easily slip in something like a temporary chain link etc and then attach 
one end of a dipole etc to that link.

This way from the ground I would be able to hoist up or down that end of 
the dipole as I pleased. Now, when the end of the dipole gets attached 
to the other end of that temporary chain link etc and the dipole is up 
in the air stretched tight there may be 30-40 pounds of tension pulling 
on that line. Since the two pulleys are fixed that tension from the 
dipole will get translated to my ropes going up and down the tower 
between the pulleys.

I have been doing this type of arrangement for 20 years but only with a 
pulley at the top of the tower. Up until now I just had the long single 
rope looped around a round aluminum cross member of my free standing tower.

There was some friction with the rope looping around the 3/8" dia round 
& smooth diagonal but I never had a failure. This season I installed a 
meaty pipe across the tower at about the 5' level and attached a pulley 
at each end (I am going to have several ropes going up and down so I can 
support and mess with more then 1 antenna).

I hope that paints a more clear picture. So far I have had a lot of 
great ideas and the only issue is me understanding their words and 
making my fingers tie the knots the way I'm supposed to hi-hi.

Gedas, W8BYA

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

On 11/27/2019 4:25 PM, Wes wrote:
> I'm with the other Wes on this one. If I understand correctly you only 
> have a load on the upper side of the knot. I would join the ends with 
> any old knot and tie a alpine butterfly loop on the upper side of the 
> knot: https://www.animatedknots.com/alpine-butterfly-loop-knot or one 
> I find easier to tie, a bowline on a bight: 
> https://www.animatedknots.com/bowline-on-a-bight-knot
>
> Wes  N7WS
>
>
> On 11/27/2019 2:06 PM, Wes Attaway (N5WA) wrote:
>> Gedas:
>>
>> You have received a lot of good suggestions.  Here is one more, and 
>> it is
>> pretty simple.  You are apparently not going to be risking anyone's 
>> life.
>> You are going to hold up one end of a dipole and there may be 
>> 30-40-pounds
>> of tension..
>>
>> I would just join the two ends of the Dacron rope with a simple 
>> square knot
>> and with 6-inches or so of each rope sticking out from the knot.  
>> Then tie
>> the two ends into a square knot.  Tape the ends to the rope if you 
>> want to.
>> With constant tension this arrangement will never come loose.  I have 
>> done
>> this many times over many years with ropes into trees and on towers, 
>> etc.
>>
>> Constant tension on the rope will keep the knots nice and tight.
>>
>>     -------------------
>> Wes Attaway (N5WA)
>> (318) 393-3289 - Shreveport, LA
>> Computer/Cellphone Forensics
>> AttawayForensics.com
>
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