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Go Back   SailNet Community > On Board > Gear & Maintenance > Flying a Symmetrical Like an Asymmetrical
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Thread: Flying a Symmetrical Like an Asymmetrical Reply to Thread
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Topic Review (Newest First)
07-27-2013 11:42 AM
MastUndSchotbruch
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by sailingfool View Post
Flying this setup off the wind without a pole will reduce the power of the spinnaker by some big factor, say 50-70%. Better than than none, yes, but not at all what the sail can offer.
Yeah, probably, at least once you are off the wind.

However: (a) In the light winds I am using the spi (I usually single-hand and am pretty conservative, so no gale-force spinakering for me), the spi brings the boat up to pretty much the speed of the wind. If it had 10 times more power, it would STILL be the speed of the wind

And (b), the OP specifically asked for a possibility to use his spi without a boom.
07-27-2013 03:12 AM
SloopJonB
Re: Flying a Symmetrical Like an Asymmetrical

I've flown a Sym. chute on a Hunter 38 with no pole. We rigged up a strop (length of line with an eye splice at each end) around the anchor roller with the jaw of a large snap shackle pinning the ends of the strop into a longish loop (3'?). The tack of the chute was held by the snap shackle. We used sheets twice the length of the boat so we could gybe the chute by streaming it ahead of the headstay and turning it inside out.

It worked pretty well and cost next to nothing - $400 for a decent used chute, $200 for the lines and shackles.

Easy to fly and lots of fun for small $$. We could get surprisingly high with the rig but couldn't sail very deep because of the big main on the Hunter.

The friend who owns the boat said he's seen 10 knots on the speedo flying it like that in a breeze.
07-26-2013 03:11 PM
sailingfool
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by MastUndSchotbruch View Post
Glad it worked for you.

But why not just fly it as a symmetrical spi, just without the boom? Even though I have a spi boom with all its paraphernalia, I do this some times to avoid the complexity of the boom. You won't be pointing very high but if you are running or on a broad reach, it will sure speed you up!
Flying this setup off the wind without a pole will reduce the power of the spinnaker by some big factor, say 50-70%. Better than than none, yes, but not at all what the sail can offer.
07-26-2013 03:09 PM
5hortBu5
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by sailingfool View Post
The loop is termed a spinnaker crane.
Well, that just smashes any doubt now, doesn't it? Additional halyard, it is!
07-26-2013 03:07 PM
sailingfool
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by 5hortBu5 View Post
...I've no idea what that loop is there for.
The loop is termed a spinnaker crane.
07-26-2013 10:53 AM
svHyLyte
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by SHNOOL View Post
If I might, he has a hank on jib, the TAN might get trashed sliding up and down a bare forestay...
I presume you meant "ATN" above (as in an ATN Tacker) and you are exactly correct. With naught but a bare headstay, the parrel beads are replaced with a short length of double layered of webbing, sewed together, with grommets on each end.
07-26-2013 10:46 AM
SHNOOL
Re: Flying a Symmetrical Like an Asymmetrical

If I might, he has a hank on jib, the TAN might get trashed sliding up and down a bare forestay...

an EASIER solution (and cheaper)... would be to get s block forward and run a tackline back to the cockpit... as he gets closer to DDW, he can ease the tack, blowing it forward some, and sheet the heck out of it as he gets closer abeam.

Something like this would work (just put it low on the pulpit, but forward https://www.catalinadirect.com/index...roduct_ID=1329 )... You aren't planning on running this in 20+ true anyway.

Oh and someone converted the symmetrical to asym on my 22... they actually put a hank about 10 inches up from one clew along with a tackline lead back to the cockpit... worked well, from almost beam to deep broad reach... Faster than the 155 racing genoa up until almost beam. This wasn't my idea, it was the prior owners, I just USED it!

it worked OK...
07-26-2013 10:34 AM
svHyLyte
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by GeorgeB View Post
I think that the above graphic is from a Sail Magazine article from a few years ago. IMHO the art department got it a little bit wrong in the first graphic. The turning block should be in front of the head stay and not behind. The second graphic shows the lazy sheet going in front of the head stay as it should. If you rigged your boat this way, the spinnaker halyard would chafe against the headstay after gybing and with the halyard wrapped, it would be very difficult in dousing the sail after a run.
I suspect the illustration was simply generic to illustrate the use of the parrel bead collar around the headstay and the adjustable tack height. On our boat we rig the stemhead turning block from the lazy anchor roller, ahead of the stay. Note, however, that, unlike an asymmetric it would be very difficult to effect a gybe with a full symmetric. Doable, but very difficult.
07-25-2013 11:09 PM
GeorgeB
Re: Flying a Symmetrical Like an Asymmetrical

I think that the above graphic is from a Sail Magazine article from a few years ago. IMHO the art department got it a little bit wrong in the first graphic. The turning block should be in front of the head stay and not behind. The second graphic shows the lazy sheet going in front of the head stay as it should. If you rigged your boat this way, the spinnaker halyard would chafe against the headstay after gybing and with the halyard wrapped, it would be very difficult in dousing the sail after a run.
07-25-2013 10:57 PM
MastUndSchotbruch
Re: Flying a Symmetrical Like an Asymmetrical

Quote:
Originally Posted by 5hortBu5 View Post
Hey Folks,

I've just been given a fairly suitably sized symmetrical spinnaker for my boat. I don't have a pole or any hardware for flying a symmetrical right, and I'm rocking a pretty draconian budget, so I'm working on VERY little disposable cash (yeah, yeah, get rid of the boat :P)

Anyway, I whipped up a jury rig last night to fly the symmetrical like an asym, basically tying one clew to a bow cleat, and sheeting the other end. It worked out surprisingly well, and I'm pretty sure my boat's never gone faster. Sure, there was a mess of curl at the luff, but there was a LOT of square footage filled up.

So now, with that successful experiment out of the way, I'm considering rigging this in a *slightly* more legitimate manner, and I was wondering if there is any kind of information about this practice, or if I'm just completely bugnuts. I mean, it seems kind of daft to fly an symmetrical like this, but man, I can't argue with the results.

Any tips? References? Guides?
Glad it worked for you.

But why not just fly it as a symmetrical spi, just without the boom? Even though I have a spi boom with all its paraphernalia, I do this some times to avoid the complexity of the boom. You won't be pointing very high but if you are running or on a broad reach, it will sure speed you up!
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