[quote=MN3][quote]I'm thinking of removing the line, injecting some very thick epoxy on each side to seal both the exterior and interior holes, then install a conventional metal type bail.[/quote]
I'm sure that would be fine except my welder tells me anywhere i use epoxy on my spars he will not weld - those materials aren't friendly for future welding - probably a moot point here
[quote]I ran the sheet through a rachtamatic block at the rear cross bar. Looking at the shape, I think it may need to come forward. One implication here is that the spinnaker pole is 13' 8" long. This may be too long as I think I had read the standard on a Nac 20 is 12 ft.
It also looks like I need a swivel at the head. After the third hoist yesterday, I had about 2 ft of sail twisted at the head with no way to deal with it. [/quote]
the older giant simetric spins used to have the blocks on the rear beam
newer spins are smaller and on mystere 5.5 and 6.0 we put our first set of blocks on the side-stay adjuster via a shackle
as per the swivel - hour-glassing in a spin is pretty common and can usually be handled by messing with the sheets to help it un-twist BUT occasionally is a real problem - i don't know any beach cats that use a swivel (although i think it could work)
Bacho is on point with the luff tension -
[quote] I think it may need to come forward. One implication here is that the spinnaker pole is 13' 8" long. This may be too long as I think I had read the standard on a Nac 20 is 12 ft. [/quote]
class rules for Tornado's is" 4000mm from the front of the main beam to the "bearing surface" (ie. forward side of the block sheave) " 4000mm = 13.12336'
NTERNATIONAL
NACRA F20 CARBON
CLASS RULES rules = Maximum bowsprit is 4170 mm = 13.6811' (not that class rules for other boats matter but good starting point)
If you shorten your bow sprit (and leave your tang at the same spot) you will have more slack in your luff<!-- editby --><em>Edited by MN3 on Apr 29, 2019 - 11:04 AM.</em><!-- end editby --> [/quote]
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