[TowerTalk] Boom truss guys - Dacron vs. phillystran

[K8RI on TT]

On 7/13/2011 5:12 PM, Pete Smith wrote:
> No stretch maybe compared to cheap dacron rope, but roughly twice that
> of steel.

Twice of "very little" ain't much.

>   See K7NV's excellent engineering analysis
> <http://k7nv.com/notebook/topics/guycable.html>.

I've used both EHS and Phillystran. (I've only used Phillystran on the 
45G) I see more give in the deep catenary of EHS than I do Phillystran.  
I've been on the tower in some pretty strong winds and it was solid.  
OTO it was also solid with EHS.

My very heavily loaded  
http://www.rogerhalstead.com/ham_files/Tower29.htm 45G   was rock solid 
with Phillystran.  OTOH the TB3 and TB4 thrust bearings only lasted 
about 6 years. Hence my move to sleeve bearings.

73

Roger (K8RI)

>
> 73, Pete N4ZR
>
> The World Contest Station Database, updated daily at www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
> spots at telnet.reversebeacon.net, port 7000
>
>
>
> On 7/13/2011 4:43 PM, Clint Talmadge W5CPT wrote:
>> Infinitely so. Properly prepared the Phillystran will be there when you are
>> gone. No stretch, no rot, impervious to bird droppings, and the list goes
>> on.
>> Give the guys at Texas Towers a call and they can fix you up.
>>
>> Clint Talmadge - W5CPT
>>
>>
>> -----Original Message-----
>> From: towertalk-bounces at contesting.com
>> [mailto:towertalk-bounces at contesting.com] On Behalf Of Guy Molinari
>> Sent: Wednesday, July 13, 2011 3:19 PM
>> To: towertalk at contesting.com
>> Subject: [TowerTalk] Boom truss guys - Dacron vs. phillystran
>>
>>
>> I have black sheathed Dacron rope for my yagi boom truss guys.   Would
>> replacing with Phillystran be wise?
>>
>> 73,
>> Guy, N7ZG 		 	   		
>> _______________________________________________
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