7x19 wire rope will probably win by sawing off the limb. 1/8" is plenty
strong enough and you might consider stainless. 400# SWL 5x safety
factor. Note the recommend sheave diameter is about 3.5" so there is a
potential fatigue factor bent around a small branch. If you shoot the
line into the limb crotch and keep the line close to the trunk it's not
clear to me what the source is for the abrasion.
I've used a pulley on the end of the rope thru the branch and never had
it abraded since the tree grows around the rope before that happens and
the pulley is permanently up there. I use marine pulleys SS plus ball
bearings (plastic), about $13. The die cast closeline junk ones fail
quickly.
btw re wire rope: Never saddle a dead horse with wire rope clips, and
Nicopress crimped sleeves are better.
Grant KZ1W
On 2/15/2017 16:22 PM, NC3Z Gary wrote:
I have been using what I thought was high quality UV resistant Dacron to
support my inverted L's. But the problem is as it runs through the
support pine trees it comes into contact with several limbs and branches
and it has been abraded to the point of failure in about 6 months. This
has happened a couple of times.
Any good products out there that is more resistant to limb abrasion?
Gary Mitchelson
NC3Z/4 Pamlico County, NC FM15
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|