[UK-CONTEST] Pulleys and rope

[Adrian Rees (MW1LCR)]

If its any use....

I use Fujikura Pulleys,  the Petzl ones. 
They have a breaking load of 22kN and MWL (Mean Working Load) of 5kN.
Cheap at about £6 a go. 

Easy pull up a 45 Foot mast with a double run, on my own. 

They also produce Rope. 

See http://www.fujikura.co.uk/speciality/index.html

For the full range of Climbing and Forestry supplies.

I got mine from Corwen Forestry in North Wales, although I'm sure you
can find some outlet closer.

Regards

Adrian MW1LCR



-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of Steve Bunting
Sent: 09 July 2007 21:59
To: uk-contest at contesting.com
Subject: [UK-CONTEST] Pulleys and rope


Hi Folks,

Having relied for a number of years on brute force to pull a portable 
mast upright using a gin pole, it seems that it is time to use a pulley 
to provide some mechanical advantage. I guess a marine pulley is the 
grade to look for? I looked at several websites and there is a baffling 
array of pulleys available. Can anyone advise me on the type required? 
Also, I am looking for opinions on how many times should one go back and

forth between gin pole and anchor stake to form a usable system? I guess

this could be calculated from first principles, but I am too lazy to do 
that!

Finally, I have been told that some contest groups use marine grade rope

for their portable masts. The plan is for this to "last a lifetime" so I

wonder which of the plethora I should choose. Any comments?

73
Steve
M0BPQ
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