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I20 spin

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(@azcat)
Posts: 424
Chief Registered
Topic starter
 
[#29157]

OK, I 20 guys, how do you deal with the extra luff length on the spin? Should I be taking the mast back toll the spin luff is tighter? When I use the spin, the luff shakes way more than the spin on my N60, can't figure why, is it due to the slack luff?
The tuning guide on this forum has the mast standing pretty straight up, which would mean slack spin luff. Is that right?
Also, I have shortened the spin pole guys by about 2

, pulling the tip down about 4.5

. Without this the spin would go about 1' above the bail


 
Posted : June 15, 2012 6:11 pm
TEAMVMG
(@TEAMVMG)
Posts: 1188
Master Chief Registered
 

You should have just enough slack inthe luff that, when you grab it between the palm of your hand and thumb, you can twist your wrist half a turn
Not sure where you are but the US guys (slow) always set up with more rake than the Europeans (fast!). You might have the wrong spiny for your set up

Edit: just spotted it- Arizona!


 
Posted : June 16, 2012 1:36 am
(@_removed-account)
Posts: 15030
Four Star Admiral Registered
 

Slack is bad, ya gotta have luff tension.

i would think a shorter pole would be part of the problem.

a longer pole would add luff tension.


 
Posted : June 16, 2012 7:03 am
Jake Kohl
(@jake)
Posts: 11744
Three Star Admiral Registered
 
Originally Posted by azcat
OK, I 20 guys, how do you deal with the extra luff length on the spin? Should I be taking the mast back toll the spin luff is tighter? When I use the spin, the luff shakes way more than the spin on my N60, can't figure why, is it due to the slack luff?
The tuning guide on this forum has the mast standing pretty straight up, which would mean slack spin luff. Is that right?
Also, I have shortened the spin pole guys by about 2

, pulling the tip down about 4.5

. Without this the spin would go about 1' above the bail

I20 spin luff lengths have lengthened a bit over time (look at old Worrel photos and how straight the spinnaker poles were). You will need a LOT of prebend in the spinnaker pole to get the right luff tension with the stock rigging. It required so much on our last boat/spin, that I stopped putting the spin pole through the welded fitting in the forestay hardware and suspended it below with separate spliced mid-pole bridles (similar to how the old Nacra F18 was rigged) and made new end-pole bridles. There's no point in pre-loading the pole so the lightest down tweak will break the sucker.


 
Posted : June 16, 2012 8:02 am
Todd A. Hart
(@team_cat_fever)
Posts: 3061
Captain Registered
 
Originally Posted by MN3
Slack is bad, ya gotta have luff tension.

i would think a shorter pole would be part of the problem.

a longer pole would add luff tension.

SMOD.You can't put on a longer pole.


 
Posted : June 16, 2012 9:32 am
PTP
 PTP
(@CaptainPP)
Posts: 2684
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Originally Posted by Team_Cat_Fever
Originally Posted by MN3
Slack is bad, ya gotta have luff tension.

i would think a shorter pole would be part of the problem.

a longer pole would add luff tension.

SMOD.You can't put on a longer pole.

there is no more

SMOD

for the N20. Check the Open20 rules and there appears to be no limit on spin pole length


 
Posted : June 16, 2012 10:49 am
(@Anonymous 39832)
Posts: 3281
 
Originally Posted by PTP
Originally Posted by Team_Cat_Fever
Originally Posted by MN3
Slack is bad, ya gotta have luff tension.

i would think a shorter pole would be part of the problem.

a longer pole would add luff tension.

SMOD.You can't put on a longer pole.

there is no more

SMOD

for the N20. Check the Open20 rules and there appears to be no limit on spin pole length

One of the multiple problems with that ruleset. Plus unless you're racing along the gulf coast then nobody that I know is using that set of rules.

What I did is what Jake says. I don't use the welded ring to put the spin pole through. I also don't rake that much. I guess that means that the slow US boats still beat me.


 
Posted : June 16, 2012 12:44 pm
Todd A. Hart
(@team_cat_fever)
Posts: 3061
Captain Registered
 
Originally Posted by PTP
Originally Posted by Team_Cat_Fever
Originally Posted by MN3
Slack is bad, ya gotta have luff tension.

i would think a shorter pole would be part of the problem.

a longer pole would add luff tension.

SMOD.You can't put on a longer pole.

there is no more

SMOD

for the N20. Check the Open20 rules and there appears to be no limit on spin pole length

What is the US Sailing portsmouth number for Open20?
I can't find any recognition of it in the current tables.
http://offshore.ussailing.org/Portsmouth_Yardstick/Current_Tables/Multihull_Classes.htm

Because a couple of people made up some rules, doesn't mean that the original class rules( as greed oriented as they are) were dissolved.


 
Posted : June 16, 2012 12:49 pm
Philip
(@pm)
Posts: 3376
Captain Registered
 
Originally Posted by Team_Cat_Fever
Originally Posted by PTP
Originally Posted by Team_Cat_Fever

SMOD.You can't put on a longer pole.

there is no more

SMOD

for the N20. Check the Open20 rules and there appears to be no limit on spin pole length

What is the US Sailing portsmouth number for Open20?
I can't find any recognition of it in the current tables.
http://offshore.ussailing.org/Portsmouth_Yardstick/Current_Tables/Multihull_Classes.htm

Because a couple of people made up some rules, doesn't mean that the original class rules( as greed oriented as they are) were dissolved.

Truer words have never been spoken.

As for the DPN, unbelievable as it may sound, it is 59.3. What a crock of BS.


 
Posted : June 16, 2012 1:04 pm
Todd A. Hart
(@team_cat_fever)
Posts: 3061
Captain Registered
 
Originally Posted by mummp
Originally Posted by Team_Cat_Fever
Originally Posted by PTP
Originally Posted by Team_Cat_Fever

SMOD.You can't put on a longer pole.

there is no more

SMOD

for the N20. Check the Open20 rules and there appears to be no limit on spin pole length

What is the US Sailing portsmouth number for Open20?
I can't find any recognition of it in the current tables.
http://offshore.ussailing.org/Portsmouth_Yardstick/Current_Tables/Multihull_Classes.htm

Because a couple of people made up some rules, doesn't mean that the original class rules( as greed oriented as they are) were dissolved.

Truer words have never been spoken.

As for the DPN, unbelievable as it may sound, it is 59.3. What a crock of BS.

In that case the stock N-20 should be about 62.4. <img src="<>/wink.gif" alt="wink" title="wink" height="15" width="15" />


 
Posted : June 16, 2012 1:11 pm
(@john5583)
Posts: 877
Master Chief Registered
 
Originally Posted by mummp

Truer words have never been spoken.

As for the DPN, unbelievable as it may sound, it is 59.3. What a crock of BS.

All ya have to do is petition US Sailing and have them review the rating, state yours or the group's position and why it should be done, and they may change it..

Or go to different rating system.


 
Posted : June 16, 2012 1:21 pm
(@bacho)
Posts: 1502
Master Chief Registered
 

What do you think the O20 number should be? I am currently serious considering using that set of rules myself.


 
Posted : June 16, 2012 1:28 pm
PTP
 PTP
(@CaptainPP)
Posts: 2684
Captain Registered
 

I don't have a N20, but sail on one a lot. I agree that, in the end, a bunch of N20 sailors got together and made up the open 20 rules. My point is that at least someone is trying to keep it alive. are there more than 7 boats elsewhere that are organized enough to try to keep the SMOD N20 alive? Don't you need manufacturer support to keep something SMOD? Anyone want to state that Nacra is interested in supporting the SMOD N20?

And I believe that the provisional rating for the open20 is the same as the OD N20.


 
Posted : June 16, 2012 2:40 pm
(@azcat)
Posts: 424
Chief Registered
Topic starter
 

I checked it out a little closer this weekend, using the second hole on the forestay adjuster , using a twing ball at the head, I. Do have a 1/4 turn on the luff. Under load this seems very loose. The wind was up this am and the spin was running a lot better. But I can't see the luff at all from skipper position. This may be normal. I run the spin on my 6.0 a bit tighter. The entire spin luff disappears behind the main. I'm sure that the spin is pretty worn out also, hope to remedy that soon.

Also, so everyone knows that it can be done, I righted this AM single handed. I am 5'10" - 185#, stood on the end of the dagger.board, jIb sheeted to the low side, came up pretty easy. Would have been pretty hard in swells though. Had to. Balance on the end of the dagger my back a about a foot off the water, 1 hand over my head. Nice to know in a pinch.

BTW, seems I keep opening up some deep wounds every time I mention the N20, I'll try to keep it up.


 
Posted : June 17, 2012 11:56 pm
(@Anonymous 39709)
Posts: 913
 

Brett, the spinn you're running on your 6.0 is an F18 spinn made by Performance Sails. It is FAR more developed than the old E/P spinn on your N20. The N20 is a bit fuller and the draft is a bit farther back, so it is like comparing a Corvette to a Radio Flyer wagon. The two will never perform the same but each have thier strong points. Not sure how old your N20 spinn is but they have evolved a little. When you're in the market for a new(er) spinn, I have one that has two takedown patches and very little use for sale.


 
Posted : June 18, 2012 8:04 am
(@_removed-account)
Posts: 15030
Four Star Admiral Registered
 
Originally Posted by Team_Cat_Fever
Originally Posted by MN3
Slack is bad, ya gotta have luff tension.

i would think a shorter pole would be part of the problem.

a longer pole would add luff tension.

SMOD.You can't put on a longer pole.

I miss-read his post

Also, I have shortened the spin pole guys by about 2

- I overlooked the

guys

and thought he shortened his spin pole 2


 
Posted : June 18, 2012 9:52 am
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