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#104211 - 04/23/07 02:57 AM Re: proper spinnaker technique [Re: scooby_simon]
f16rick Offline
stranger

Registered: 03/01/07
Posts: 19
Loc: Toronto
Quote:

just before you get to real drifting conditions where you are just trying make progress with very little pull in the sails.




I seem to have some success with VMG in very light conditions easing the spin halyard, to increase the luff a couple of inches then going deeper. As previously noted, adjust trim accordingly.
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Blade 722

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#104212 - 05/08/07 12:55 PM Re: proper spinnaker technique [Re: fin.]
LuckyDuck Offline
enthusiast

Registered: 08/21/02
Posts: 396
Loc: Annapolis Md.
Being new to spins, here's my question. I heat the boat up. hull starts to lift, I bear off gradual and smooth, but the aparent wind still comes forward and collapses the spin. Am I supposed to sheet in as the aparent comes forward? To bear off more seems to just stall the boat. Basically, should I be trimming the chute or leave it set and drive to it? Thanks. Ed
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Still hazey after all these beers.
F-16 Falcon #212

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#104213 - 05/08/07 01:36 PM Re: proper spinnaker technique [Re: LuckyDuck]
Matt M Offline
addict

Registered: 06/18/01
Posts: 548
Loc: MERRITTISLAND, FL
Quote:

Being new to spins, here's my question. I heat the boat up. hull starts to lift, I bear off gradual and smooth, but the aparent wind still comes forward and collapses the spin. Am I supposed to sheet in as the aparent comes forward? To bear off more seems to just stall the boat. Basically, should I be trimming the chute or leave it set and drive to it? Thanks. Ed




Ed,

The spin will need constant trimming but in very small increments. I know I am in the groove when I am having to move no more than 6-8 inches to keep it full and flowing.

If you find your apparent switching, especially to the point of coming so far forward as to collapse the sail, you are either comming up way too far or waiting to bear off too long. You want to remember that you are comming up to get additiional hull speed, not necessarily to try and fly the hull. As you are learning, try to keep the ratchets off so you can feel the sail. When rounding up you want to only go up as far as where you are feeling increased pressure in the sail. At this point hold it steady and try very small increments of up and down to judge relative hull speed and try to maintain the pressure in the sail. Adjust your crew weight accondingly then depending on the conditions so that at this point you can get the windward hull up (if it is not too gusty or wavy and you feel comfortable)

This is very critical when the wind is lighter. When it is blowing it is very easy to feel the hull speed change with the tiller. When it is light is is very easy to way over steer and go very slow. When it is light downwind my crew tells me constantly how to drive based on the pull on their sheet. Cat sailing is all about maximizing hull speed. Whe it is right, you are fast and the apparent wind will stay very steady even if the conditions are not.

M

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#104214 - 05/08/07 01:45 PM Re: proper spinnaker technique [Re: Matt M]
bobcat Offline
addict

Registered: 12/25/05
Posts: 433
Loc: Edmonton, Alberta, Canada
Excellent info Matt.
Thanks
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F16 Blade 716

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#104215 - 05/08/07 03:12 PM Re: proper spinnaker technique [Re: bobcat]
PTP Offline
Carpal Tunnel

Registered: 08/25/05
Posts: 2877
Loc: Michigan
I have found that it is very easy to oversheet the spin especially in light air. I am still learning the best combo of triming/helming to make the go the way it is supposed to. I understand the concept of driving to the spin but when I am crewing I always try to make sure the spin is "breathing" regardless of the helming (takes a lot of effort but I think you clearly get more speed out of it than only driving to the spin)

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#104216 - 05/08/07 04:32 PM Re: proper spinnaker technique [Re: PTP]
Tornado Offline
old hand

Registered: 07/25/01
Posts: 1197
Loc: Vancouver, BC
On the Tornado in light air and small chop, I've found taking the spin sheet from the crew allowed me to coordinate helming & sheeting much much better. This might not be better once you & crew have lots & lots of experience...but it sure helped us gain lots of places and eventually to finish 1st in a distance race last year.

Other tips I've learned...never oversheet the spin...if in doubt, ease it out and keep it on the verge of collapse/luff curling periodically for max power.

To carry the spinny higher in a breeze, try easing off halyard and/or tack line. This has the effect of flattening the luff, thus de-powering and giving more "point" to the sail.

In light stuff, crew goes to leeward and at or forward of the main beam...leans outboard holding trap handle. Helm sits as forward as possible (dependant on tiller length) and moves in board, typically near the mast. This lets us lift the hull in some really light stuff. But, don't make the mistake of trying to lift it at all other costs. There comes a wind speed when it just doesn't pay to keep heading up...sail flat and go for VMG...just be ready for the puffs to get the hull out.
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Mike Dobbs
Tornado CAN 99 "Full Tilt"

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#104217 - 05/08/07 04:39 PM Re: proper spinnaker technique [Re: Matt M]
LuckyDuck Offline
enthusiast

Registered: 08/21/02
Posts: 396
Loc: Annapolis Md.
Thanks much guys. This will my first Tuesday night race with the Blade tonight. Conditions are supposed to be typical Ches Bay 5 to 10. It will be a good chance to work with the other F-16s to get some groove on.
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Still hazey after all these beers.
F-16 Falcon #212

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#104218 - 05/09/07 11:32 PM Re: proper spinnaker technique [Re: LuckyDuck]
bobcat Offline
addict

Registered: 12/25/05
Posts: 433
Loc: Edmonton, Alberta, Canada
This is one of Roy's images from the 2007 Alter cup. Compare the sail twist and mast bend between boats 2 and 6.
Try to be like 2.


Attachments
107626-IMG_1769[1].jpg (38 downloads)

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#104219 - 05/09/07 11:57 PM Re: proper spinnaker technique [Re: bobcat]
PTP Offline
Carpal Tunnel

Registered: 08/25/05
Posts: 2877
Loc: Michigan
increase rotation and blow downhaul right?

I guess you were allowed to add streamers to the boats huh?


Edited by PTP (05/09/07 11:58 PM)

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#104220 - 05/10/07 12:01 AM Re: proper spinnaker technique [Re: PTP]
Robi Offline
Carpal Tunnel

Registered: 07/08/04
Posts: 2718
Loc: St Petersburg FL
Also note the mainsheet on boat six. IMO way to slack.

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