Announcements
New Discussions
Previous Thread
Next Thread
Print Thread
Rate Thread
Hop To
Page 1 of 8 1 2 3 4 5 6 7 8
Square top sails #227260
01/22/11 06:05 AM
01/22/11 06:05 AM
Joined: Mar 2009
Posts: 110
D
Devon Offline OP
member
Devon  Offline OP
member
D

Joined: Mar 2009
Posts: 110
I am getting a new mainsail for my I17 it currently has a very small square top, Nacra have said that bigger is better,They have mentioned pentax as a material, which will match my jib. Why just go square why not go up and out ? Like the 18ft skiffs do. Any suggestions please..

-- Have You Seen This? --
Re: Square top sails [Re: Devon] #227339
01/24/11 03:15 AM
01/24/11 03:15 AM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
veteran
JeffS  Offline
veteran

Joined: May 2006
Posts: 1,383
Kingston SE South Australia
I would definately say go with Square top it gives a lot more drive up top, I've only had mine on the 5.7 Taipan for 6 sails and swum 4 times but I was going faster each time. Your mast section is important if its too light you won't be able to rotate much or it will bend over backwards when you pull the main on and sideways if you dont have the main on enough. The design is really limited by your class rules on size and shape. Does your class include the mast in the sail area? If not you can get a stiffer section like an F18 which gives you the stiff mast and technically extra sail area. I know the Stingray sailors pick up about .4m2 doing that.
Put a camera on your boat when you first put the big head on and post it on you tube, I've kept my mates laughing for hours with my videos


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: Square top sails [Re: JeffS] #227341
01/24/11 05:47 AM
01/24/11 05:47 AM
Joined: Nov 2005
Posts: 1,203
uk
TEAMVMG Offline
veteran
TEAMVMG  Offline
veteran

Joined: Nov 2005
Posts: 1,203
uk
Originally Posted by JeffS
p, I've only had mine on the 5.7 Taipan for 6 sails and swum 4 times


Were those capsizes done whilst bearing off around the windward mark by any chance


Paul

teamvmg.weebly.com
Re: Square top sails [Re: JeffS] #227342
01/24/11 05:54 AM
01/24/11 05:54 AM
Joined: Aug 2009
Posts: 117
Cairns FNQ
engineer Offline
member
engineer  Offline
member

Joined: Aug 2009
Posts: 117
Cairns FNQ
Don't worry Jeff, I'll have the camera ready.....


Nacra 430 Rocket
Re: Square top sails [Re: engineer] #227344
01/24/11 06:35 AM
01/24/11 06:35 AM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
veteran
JeffS  Offline
veteran

Joined: May 2006
Posts: 1,383
Kingston SE South Australia
If you want a laugh have a look at this from last Saturday we had a big reach, I was crew on my boat with the traveller and didnt let go quick enough ended up slamming into the spin pole and hanging there stunned for a while. Very funny
http://beachcatsaustralia.ning.com/video/taipan-57-pitchpole-22nd-jan

Last edited by JeffS; 01/24/11 06:38 AM.

Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: Square top sails [Re: JeffS] #227353
01/24/11 11:16 AM
01/24/11 11:16 AM
Joined: Jul 2007
Posts: 976
France
pepin Offline
old hand
pepin  Offline
old hand

Joined: Jul 2007
Posts: 976
France
Originally Posted by JeffS
If you want a laugh have a look at this from last Saturday [...]
This is behind a registration wall. Can you put it on YouTube or dailymotion, aka some place we could look at it without registration?

Re: Square top sails [Re: pepin] #227392
01/24/11 03:01 PM
01/24/11 03:01 PM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
veteran
JeffS  Offline
veteran

Joined: May 2006
Posts: 1,383
Kingston SE South Australia
Sorry I didn't know you had to register
http://www.youtube.com/watch?v=YbiznaTG2AY

Last edited by JeffS; 01/24/11 03:03 PM.

Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: Square top sails [Re: JeffS] #227411
01/24/11 04:50 PM
01/24/11 04:50 PM

S
Scarecrow
Unregistered
Scarecrow
Unregistered
S



Jeff you need to get your crew working for his ride. Make him trim the main, the rapidly moving back ground suggests you're using the tiller a lot.

Re: Square top sails [Re: ] #227448
01/24/11 10:26 PM
01/24/11 10:26 PM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
veteran
JeffS  Offline
veteran

Joined: May 2006
Posts: 1,383
Kingston SE South Australia
G'day Scarecrow they were just off shore puffs officially measured on land at 56km/hr throwing us around, if you watch Fergs on the tiller he's pretty steady. Now I know you guys are there and you guys have heaps more knowlege of boat design, sails and masts. I would say that if Devon's mast has about 50-60mm pre bend he could carry a bigger head main and lessen his prebend to 20-30mm or less. How do you work out how big the head can go, how much prebend? You need the camera on the spin pole to share the pain Chocko


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: Square top sails [Re: JeffS] #227453
01/24/11 11:22 PM
01/24/11 11:22 PM

S
Scarecrow
Unregistered
Scarecrow
Unregistered
S



Working out how big a head can go is easy. You keep making it bigger until the mast breaks.

Re: Square top sails [Re: JeffS] #227457
01/25/11 12:21 AM
01/25/11 12:21 AM
Joined: Mar 2009
Posts: 932
Solomon's Island, MD
S
samc99us Offline
old hand
samc99us  Offline
old hand
S

Joined: Mar 2009
Posts: 932
Solomon's Island, MD
Jeff,

The crew in the video (I presume you) didn't let the main out ONCE in the upwing footage. In a non race scenario, driving up obviously worked out in keeping the boat upright. In a race situation, however, this is slow as molasses. The crew should be working the main in conjunction with the skipper to keep the boat at an optimal angle of heel at all times (windward hull just kissing the water), which generally equates to best VMG upwind.


Scorpion F18
Re: Square top sails [Re: Devon] #227459
01/25/11 02:18 AM
01/25/11 02:18 AM
Joined: Jul 2001
Posts: 953
Western Australia
Stewart Offline
old hand
Stewart  Offline
old hand

Joined: Jul 2001
Posts: 953
Western Australia
A skiff rig needs to be a LOT more automatic than a cat.

Re: Square top sails [Re: samc99us] #227460
01/25/11 02:19 AM
01/25/11 02:19 AM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
veteran
JeffS  Offline
veteran

Joined: May 2006
Posts: 1,383
Kingston SE South Australia
I think Devon wants to avoid breaking the mast, I found the mast tuning is unbelievably critical, I was keeping up with Fergs with my small head main, even beat him in our distance race when he had the new Goodall Bighead with new mast supposedly tuned for the sail, he lessened his prebend by 30mm and softened the diamond wires a couple of weeks ago and smoked me. I havn't heard of a Nacra dealer doing different sail design, I thought it was all class stuff, did he say he's done it for other I17's. Sorry Sam my bad,I don't want to hijack the thread but to save my already ragged reputation, I'll give one last link to me sailing in a blow when another 5.7 pitchpoled, it shows me and my wife mucking around keeping the boat flat.
http://www.youtube.com/watch?v=SmzwEhc_83w
or
http://beachcatsaustralia.ning.com/video/sailing-10410rain-and-30kt


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: Square top sails [Re: JeffS] #227465
01/25/11 08:10 AM
01/25/11 08:10 AM
Joined: Mar 2009
Posts: 110
D
Devon Offline OP
member
Devon  Offline OP
member
D

Joined: Mar 2009
Posts: 110
Im very attatched to my mast as it is only 3 mths old, we just launched another I17 and we put a F18 spinaker on it, had to go a little higher up the mast but it worked ok in light breezes, lot of sail for 1 up and the mast had a lot of bend but it is a wing shape and was rotated, I would like to have a bigger head LOL wouldnt we all but also go up higher as the 18ft skiff do, will talk to nacra about this as they are the ones to give the ok and so far they seem to want to go that way...Thanks for the advice

Re: Square top sails [Re: Devon] #227549
01/26/11 01:45 AM
01/26/11 01:45 AM

S
Scarecrow
Unregistered
Scarecrow
Unregistered
S



Devon which mast extrusion do you have? Is it the infusion one? Given you have less righting moment, you could hang just about any main off it that you could make fit.

Re: Square top sails [Re: ] #227555
01/26/11 06:04 AM
01/26/11 06:04 AM
Joined: Aug 2009
Posts: 117
Cairns FNQ
engineer Offline
member
engineer  Offline
member

Joined: Aug 2009
Posts: 117
Cairns FNQ
Devon's boat and Alex's with F18 spinnaker

Last edited by engineer; 01/26/11 06:05 AM.

Nacra 430 Rocket
Re: Square top sails [Re: Devon] #227625
01/26/11 09:10 PM
01/26/11 09:10 PM
Joined: Jun 2001
Posts: 1,459
Annapolis,MD
Keith Offline
veteran
Keith  Offline
veteran

Joined: Jun 2001
Posts: 1,459
Annapolis,MD
OK, speaking of squaretop sails - in looking at the Tradewinds pics I noticed that one of the N-20s (red, sail #11) had a main with much more of a square top than the others. Unless I'm not seeing things correctly. What's up there? New Nacra cut stock sails? Calvert? How did the compare? Curious I am...

Re: Square top sails [Re: Keith] #227627
01/26/11 09:20 PM
01/26/11 09:20 PM
Joined: Aug 2007
Posts: 1,304
Gulf Coast relocated from Cali...
TeamChums Offline
veteran
TeamChums  Offline
veteran

Joined: Aug 2007
Posts: 1,304
Gulf Coast relocated from Cali...
It was a sail Mark Smith had made from an aftermarket sailmaker. I thought Trey Brown was supposedly spearheading new sails for the class. Last word was they were planning on a new spinn first. I heard he had two new ones at a recent regatta but not sure what the details are. I'm going with another maker soon myself. One guy in the GT last year had a new design main that he had C and C sailmakers do for him and he was pretty fast in the light air. Unfortunately the squall on day one ruined it for the rest of the race.


Lee

Keyboard sailors are always faster in all conditions.
Re: Square top sails [Re: TeamChums] #227646
01/27/11 12:22 PM
01/27/11 12:22 PM
Joined: Nov 2008
Posts: 69
L
Lost in Translation Offline
journeyman
Lost in Translation  Offline
journeyman
L

Joined: Nov 2008
Posts: 69
I believe Kirk at Key Sailing now has the two test kites for new development. Trey and I had them at an event at Nigel's in the late fall but they were rigged for end pole snuffer so that we couldn't try them. We put one up in the parking lot and noticed the luff was significantly shorter. Hard to see a lot else without any wind. Should be a lot easier on the spin poles though by not requiring as much pre-bend.

I believe the new kite is coming out soon but don't know the dates. I've asked Trey to give an update.

Re: Square top sails [Re: Lost in Translation] #227648
01/27/11 01:33 PM
01/27/11 01:33 PM
Joined: Aug 2007
Posts: 1,304
Gulf Coast relocated from Cali...
TeamChums Offline
veteran
TeamChums  Offline
veteran

Joined: Aug 2007
Posts: 1,304
Gulf Coast relocated from Cali...
Interesting. At what time will this information about these two new design spinns be made available to the class? Are they available for some of us to try or just for a select few? I hope Trey will chime in here sometime, being that he is the Class President and all.


Lee

Keyboard sailors are always faster in all conditions.
Page 1 of 8 1 2 3 4 5 6 7 8

Moderated by  Damon Linkous 

Search

Who's Online Now
0 registered members (), 675 guests, and 98 spiders.
Key: Admin, Global Mod, Mod
Newest Members
Darryl, zorro, CraigJ, PaulEddo2, AUS180
8150 Registered Users
Top Posters(30 Days)
Forum Statistics
Forums26
Topics22,404
Posts267,055
Members8,150
Most Online2,167
Dec 19th, 2022
--Advertisement--
Powered by UBB.threads™ PHP Forum Software 7.7.1