Why not splice it? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Derry Sent: Friday, 10 March 2006 5:38 AM To: [EMAIL PROTECTED] Cc: aus-soaring; Winchdesign Yahoogroups Subject: [Aus-soaring] Re: [pulleylaunch] Knots?
To: http://groups.yahoo.com/group/pulleylaunch/ cc others Neil I should have expanded a little more about knots. A FEATURE THAT OUR COUSINS USING WINCHES CANNOT TAKE ADVANTAGE OF The knots which we used that worked were reef knots. If you look at a reef knot, the knot sticks out one side and the two lengths of rope line up under pressure. So when you watch a rope with a reef knot in it go around a pulley at speed and under load the line of the rope goes right against the pulley and the reef knot sticks out to the side. After watching knots go around pulleys many times under load I was amazed to see that the line of the rope always went against the pulley and the knot was on the opposite side. Reef knots slip easily so we tied a knot at the end of each peice of rope to stop it slipping. This worked a treat. A knot savy pilot saw a reef knot we had tied before a launch and replaced it with some other superior knot in terms of strength. Unfortunately when the knot went through the pulley it snapped. The reason it snapped was that the two lengths of rope did not line up when under pressure and the knot did not stick out to the side. The knot was on the inside of one of the pieces of rope and acted as a fulcrum placing much stress on the rope at the edge of the knot. Has anyone eany other thoughts about knots.....it is a big subject ? Regards Michael Derry "Neil Wolthers" <[EMAIL PROTECTED]> wrote: http://groups.yahoo.com/group/pulleylaunch/ > Is there any particular reason you guys are using knots in the rope? _______________________________________________ Aus-soaring mailing list Aus-soaring@lists.internode.on.net To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring _______________________________________________ Aus-soaring mailing list Aus-soaring@lists.internode.on.net To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
