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Post by dralyagmas on Jan 15, 2015 23:26:22 GMT
I want to put spinnaker tweakers on my Sf37. I currently do not use spinnaker braces (guys) as the kite is not real big and I don't want the complexity (sing out if this is bad).
What I am thinking is using a snatch block (30mm Holt Allen) so that I can also use them to change the jib angle on tight reaches. This will run in a 2:1 using 6mm (dyneema with polyester cover) to a Harken 29mm block on a padeye running back to turning block and a cam cleat. I was thinking of 25m on each side would be heaps so I would just buy a 50m roll of the rope.
Am I underestimating loads here and need to beef it up?
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Post by hoppy on Jan 15, 2015 23:38:38 GMT
I've never seen a snatch block anywhere near as cheap as the 30mm Holt Allen. I gave up looking for a reasonable priced snatch block and just used normal blocks when I set up tweakers for my Gennaker. For block sizing, the Harken site gives a good guide to what you need www.harken.se/content.aspx?id=3913 |
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Post by jdl01 on Jan 16, 2015 0:56:04 GMT
Hi dralyagmas,
Do you use a dip pole gybe or end for end on your chute? This will significantly bear on your best choice.
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Post by dralyagmas on Jan 16, 2015 3:15:48 GMT
Dip pole but not sure why that would make a difference with tweakers...
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Post by dralyagmas on Jan 16, 2015 3:55:03 GMT
Looking at what Hoppy posted it seems that I might go for spinnaker guys rather than tweakers. Might workout cheaper anyway.
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Post by jdl01 on Jan 16, 2015 4:35:48 GMT
The point was, if you use end for end technique, sheets and guys are the only way to go on a medium sized boat.
With dip pole, either system works well assuming your block- snatch or not - is placed on the rail at the widest point of your beam and led to a clutch in the cockpit. Racing, we always used sheet and guy so we could run with lighter weight sheets in light air and reconnect the guys when the breeze came up.
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Post by rene460 on Jan 17, 2015 11:13:37 GMT
Hi dralyagmas,
Tweakers and sheets/guy arrangements are very separate issues, it is not a matter of either/or but rather consider each separately.
Loads on tweakers are low compared with the sheet and guy, and I would install these first to use with your current sheets, to allow adjustment of the sheet lead for shy running as you proposed in your earlier post, and follow the Harken or similar guide for sizing for your boat size
Whether or not to have separate sheets and guys is more a question of pole weight and how you and your crew intend to gybe the spinnaker, but as my symmetrical spinnaker experience is limited to much smaller boats, I will leave it to others to say what they do for your boat size. In absence of other factors simplicity has a lot going for it.
rene460
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Post by jdl01 on Jan 24, 2015 0:48:47 GMT
Relative loads on the sheet or guy are what you choose them to be. Both systems require about the same amount of fussing around to get them initially set up [ assuming cockpit leads ]. On a medium size boat, handling a lazy line as opposed to a loaded line is always much easier for foredeck crew and even more so if you are single handing. I do not subscribe to the "do this and see if it works" school of sailing. Do not end up drilling holes twice in your boat to solve the same issue.
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Post by hoppy on Jan 24, 2015 11:32:09 GMT
Relative loads on the sheet or guy are what you choose them to be. Both systems require about the same amount of fussing around to get them initially set up [ assuming cockpit leads ]. On a medium size boat, handling a lazy line as opposed to a loaded line is always much easier for foredeck crew and even more so if you are single handing. I do not subscribe to the "do this and see if it works" school of sailing. Do not end up drilling holes twice in your boat to solve the same issue. Before I drilled holes to mount a U bolt through my deck I was able to test the tweaker (or is it barber hauler) by connecting the block to the midship cleat. It worked, so then I got braver  |
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Post by jdl01 on Feb 28, 2015 20:48:52 GMT
Hi Hoppy,
I may be wrong but I understand a tweaker to be a rolling snubber on a sheet, while a barberhauler connects directly to the sail tack.
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Post by jdl01 on Mar 1, 2015 17:07:49 GMT
ooops, I meant clew/not tack
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