[TowerTalk] Need a Knot Expert

[Howard]

Hi,


I'm sorry I don't have any additional knot information than what has 
already been provided, however, I have a question.  After you pull the 
loop for your dipole to the top pulley, how do you intend to hold the 
rope in that position?


Howard, WA9YBW


On 11/27/2019 3:50 PM, Gedas wrote:
> 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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