Main backwinding while using 150% - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 31 Old 08-07-2008 Thread Starter
I don't discuss my member
 
zz4gta's Avatar
 
Join Date: Aug 2007
Location: Chesapeake Bay
Posts: 2,556
Thanks: 0
Thanked 33 Times in 33 Posts
Rep Power: 10
 
Main backwinding while using 150%

When I use my #1 obviously it has a bit of overlap, but the weird part is that it looks like its throwing wind on the lee side of the mainsail. This completely dissrupts the main and the only way to fix it has been trimming in the main and moving the traveler all the way to winward. My traveler is over 4.5' long so that gives you an idea of how much adjustment I have to make.

I know this opens the slot quite a bit and would like to know if there is a better way to keep the main in trim and still keep up my speed. I tried rigging a cuningham but it didn't seem to do much. I've just never seen a traveler over that far to windward before.

Merit 25 # 764 "Audrey"
zz4gta is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 31 Old 08-07-2008
Senior Member
 
chucklesR's Avatar
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 12
     
If 'throwing wind on the lee side of mainsail' means there is an actual pocket pushed into the mainsail aft of the luff:

Try loosening the leech on the genny, there should be a leech cord to adjust it's 'cup' or adjusting the foot back further on the track.

When you say trimming in the main am I to assume you mean over trimming, i.e. the luff is backed and that the tell tales are no longer streaming aft on both sides of the mains leech.
chucklesR is offline  
Quote Quick Reply Share with Facebook
post #3 of 31 Old 08-07-2008
Senior Member
 
Gary M's Avatar
 
Join Date: May 2006
Location: Sarnia ON
Posts: 695
Thanks: 3
Thanked 5 Times in 5 Posts
Rep Power: 11
 
It is supposed to direct wind across the back of your main, that is faster.

First if you are close hauled then you should expect that the main will be soft along the front 1/4 maybe. If it is excessive then have you outhauled to the max, tighten your Cunningham and applied backstay to bend your mast to flatten out your sail some and reduce this affect.

Also your main may simply be too full or stretched out. Is it Dacron ? or as has already been suggested your headsail leech may be stretched out and the leech cord may be tight enough to cause a hook in your leech. Very common on older sails.

Come look at mine.
Gary M is offline  
Quote Quick Reply Share with Facebook
post #4 of 31 Old 08-07-2008 Thread Starter
I don't discuss my member
 
zz4gta's Avatar
 
Join Date: Aug 2007
Location: Chesapeake Bay
Posts: 2,556
Thanks: 0
Thanked 33 Times in 33 Posts
Rep Power: 10
 
I think there is a 'cup' on the genny, but even with the leech line free it doesn't seem to flatten out. Here's a couple pics. The draft lines really help to show the shape. And yes, this is on a close hauled course.


Merit 25 # 764 "Audrey"

Last edited by zz4gta; 08-07-2008 at 05:27 PM.
zz4gta is offline  
Quote Quick Reply Share with Facebook
post #5 of 31 Old 08-07-2008 Thread Starter
I don't discuss my member
 
zz4gta's Avatar
 
Join Date: Aug 2007
Location: Chesapeake Bay
Posts: 2,556
Thanks: 0
Thanked 33 Times in 33 Posts
Rep Power: 10
 
Note: this is also with the lead car at the very front of the track.

Merit 25 # 764 "Audrey"
zz4gta is offline  
Quote Quick Reply Share with Facebook
post #6 of 31 Old 08-07-2008
On the hard
 
CharlieCobra's Avatar
 
Join Date: May 2006
Location: Bellingham, WA.
Posts: 3,502
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 12
   
A certain amount of speed bubble is still fast. On close haul you should have your traveller all the way to windward to point and make best speed, especially with a masthead foresail.
CharlieCobra is offline  
Quote Quick Reply Share with Facebook
post #7 of 31 Old 08-07-2008
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 15
         
It could also be the fairlead for the genny is in the wrong position. Too far forward, and the leech would be too tight.

BTW, if your genoa fairlead car is all the way forward, it is very likely too far forward.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #8 of 31 Old 08-07-2008
Owner, Green Bay Packers
 
Join Date: Sep 2006
Location: SW Michigan
Posts: 10,318
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
       
The first photo shows you're pulling downward too much on the genoa creating that cup while the foot is slack. Lead your sheet further aft to achieve a more horizontal strain.

“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.
sailaway21 is offline  
Quote Quick Reply Share with Facebook
post #9 of 31 Old 08-07-2008
Senior Member
 
Join Date: Feb 2007
Posts: 2,527
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
       
Try setting the fairlead car at mid track and adjusting from there a little at a time and see what happens. Done this on a couple of boats to figure out how to trim that particular boat.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
denby is offline  
Quote Quick Reply Share with Facebook
post #10 of 31 Old 08-07-2008 Thread Starter
I don't discuss my member
 
zz4gta's Avatar
 
Join Date: Aug 2007
Location: Chesapeake Bay
Posts: 2,556
Thanks: 0
Thanked 33 Times in 33 Posts
Rep Power: 10
 
horizontal strain and inducing more twist in the sail? I'll try that. Thanks.

Merit 25 # 764 "Audrey"
zz4gta is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Retrieving Main Halyard from top of Mast? CapnSantiago Gear & Maintenance 58 05-22-2012 10:14 PM
main sail lugs breaking, why? papasailor General Discussion (sailing related) 7 07-01-2008 05:36 PM
Adding A Furling Main To A 310? BVIMoonchaser Catalina 6 04-12-2008 06:18 PM
main sail from genoa sailbot Gear & Maintenance 16 04-08-2008 01:20 PM
Life in the fast lane, well for one day at least... Lancer28 Learning to Sail 8 11-27-2007 11:36 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome