dogbone as dyneema line terminator?

[asdf777]

I have a carbon fiber rod leftover from another project and am wondering if it would make sense to use it (cut in pieces) as a dog bone when terminating dyneema on a roller furler (there is a hole on it) and on the mainsail for reefing cringles.



It's very slippery... I put some rigging tape and it makes it better, but still does not seem very secure. Yet, I see examples of a similar setup made by Tylaska and others:



http://www.chicagoyachtrigging.com/w...711_113730.jpg

http://www.chicagoyachtrigging.com/w...03/dbsheet.jpg


Thanks!
Gleb

[Brion Toss]

Hi,
Dogbones are handy, but I recommend just tying a knot in the end. If the result is too small for the hole, thread a washer on first. Weak, very weak, it is true, but that will only matter if you don't put enough turns on the drum to prevent the knot from being loaded. Which you should do with any material.
Fair leads,
Brion Toss

[asdf777]

Roger that. I thought dyneema is too slippery for knots? Especially as-78...
Yes, the hole I have on the roller furler is probably 3/8" - 1/2" and it will be too big for a stopper knot.

Another idea was to get a piece of rope and tie a diamond knot with the roller furling line. What do you think?

Thanks,
Gleb

[Brion Toss]

Hi again,
Yes, Spectra is slippery. That's why the extra turns on the drum would be so important. And because knots weaken any rope, those extra turns are needed for regular rope furling lines.So you could try one of the rope-enlarging methods we've talked about. Or maybe you could drill a smaller hole in the drum, with faired edges.
Fair leads,
Brion Toss