Search found 503 matches
- August 27th, 2016, 6:17 pm
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
gahamby, if the sail is in good shape, stay with it. Maybe it spent several years not used. Fresh water sailing is much easier on sails than salt water sailing. At your weight don't sit in the back of the boat and make it squat. Keep the knuckle of the bow underwater and you will have the boat trimm...
- August 27th, 2016, 12:18 pm
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
The gaff batten does need to be a little stiffer than any of the other battens in the sail. If you have Tom fix your sail, he can supply you with a correct top/gaff batten at that time. Was your sail built in 1984? If so, you might need a new one.
- August 26th, 2016, 4:19 pm
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
Yes, make the square top anywhere from 25% to 40% as wide as the foot of the sail.
The factory is using 40%. No Change to the foot.
Go for it.
If you don't have an experienced sailmaker with square top sails in your area,
maybe Tom Haberman could do it for you.
The factory is using 40%. No Change to the foot.
Go for it.
If you don't have an experienced sailmaker with square top sails in your area,
maybe Tom Haberman could do it for you.
- August 26th, 2016, 7:04 am
- Forum: Technical Forum
- Topic: Spinnaker Theory
- Replies: 14
- Views: 20687
Re: Spinnaker Theory
Kevin, The spinnaker on your boat when trimmed and sailed properly, it is acting like a big Genoa sail. The airflow will be across the sail. You need luff taletells to see when the flow is attached and flowing across the sail just like on your jib. The spinnaker and main are trimmed in tight. Do not...
- August 25th, 2016, 7:42 pm
- Forum: General Discussion
- Topic: Generic Sails
- Replies: 4
- Views: 6371
Re: Generic Sails
Bruiser What I am going to tell you applies to any jib, factory made or otherwise. I use the jib sheet tension to set the overall shape of the jib. I use the clew corner adjustment plate to set the jib leech position and leech shape when looking up the leech. When you connect the jib sheets to the h...
- August 25th, 2016, 2:16 pm
- Forum: Technical Forum
- Topic: Spinnaker Theory
- Replies: 14
- Views: 20687
Re: Spinnaker Theory
Kevin, no you are not trying to stall the spinnaker. When the hull flies TOO HIGH with spin, bare off a little. Why? When you bare off,the resultant force from the rig is aimed more forward. The boat has much more forward stability, 20ft long, than it has sideways stability, 12ft wide. So, bare off ...
- August 25th, 2016, 1:01 pm
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
gahamby, yes your dacron SC !5 mainsail can be made into a square top by adding width at the top. Your sailmaker needs to know what he is doing. Some of the load traveling up the leech needs to continue up to the square top corner and then come across the top to the mast. The upper leech should be t...
- August 25th, 2016, 8:34 am
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
havliii, Why would one go to all that trouble and expense to cut down a sail and rig just to break even. To get a new reinforced head put on a mainsail would cost a few hundred dollars. Option 2, make a square top out of your 30ft pin head sail and go faster. This is what the sailing world is doing....
- August 24th, 2016, 9:33 pm
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
havliii, In scientific testing, one parameter at a time is varied. In the span effectiveness tests where the taper ratio was varied over a wide range, SAIL AREA or WING AREA was held constant while tip chord to root chord ratio was varied. If area had been allowed to vary at the same time, no defini...
- August 24th, 2016, 6:15 pm
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
HI Kevin, I was advised that locked was the best way to handle this paper. Two more are coming thanks to Matt Haberman. A wingtip plate might help reduce the wing tip vortex, leakage over the tip. A correctly built wing/sail "tip" should have a slight upward slope to it toward the trailing...
- August 24th, 2016, 11:38 am
- Forum: Technical Forum
- Topic: Square Top vs Pin Head
- Replies: 25
- Views: 25565
Re: Square Top vs Pin Head
Bruiser, our primary objective is to get the most thrust per square foot of sail area out of the sail. This will occur at a sail twist that matches the twist in the relative wind direction from the foot of the sail to the head of the sail. If we increase the twist more than than that, the spanwise f...
- August 23rd, 2016, 4:41 pm
- Forum: Technical Forum
- Topic: SC19 Rework
- Replies: 59
- Views: 60516
Re: SC19 Rework
Bruiser, thanks for your comment. When we go to races, occasionally we see an old SC that has been restored. There was one at the Mug Race for the last two years. Why don't we see any NACRAs or Hobies being restored? Answer: In the field of fiberglass boat building products there are three levels of...
- August 23rd, 2016, 11:05 am
- Forum: General Discussion
- Topic: More on leeway and sail trim (tom's video)
- Replies: 7
- Views: 7990
Re: More on leeway and sail trim (tom's video)
Thanks T. Peterson, "ride'm cowboy'!
That technique is about 40 years old.
How did it get Lost?
That technique is about 40 years old.
How did it get Lost?
- August 22nd, 2016, 3:42 pm
- Forum: Technical Forum
- Topic: SC19 Rework
- Replies: 59
- Views: 60516
Re: SC19 Rework
I see very much hard work to repair this boat/these hulls. Thanks for saving their lives.
Some one must have paid you to take this boat.
Some one must have paid you to take this boat.
- August 21st, 2016, 8:50 pm
- Forum: General Discussion
- Topic: New Sails - Help, Tom!!??
- Replies: 10
- Views: 9735
Re: New Sails - Help, Tom!!??
Dan, Relative to your comment about Tom wanting you to by sails that will uphold the SC/ARC reputation. NUMBER ONE PRIORITY, "TOM WANTS YOU TO BE PLEASED WITH THE NEW SAIL". Tom has spent hours on the phone trying to straighten out sail messes people have gotten into when they bought sails...