Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 14-07-2020, 10:36   #1
Senior Cruiser
 
djousset's Avatar

Join Date: Nov 2017
Location: New Hampshire
Boat: 1987 Pearson 33
Posts: 63
Car position for jib sheet aft/forward

Relative newbie flying a 130 this year and trying to learn about the proper positioning of the car for the jib sheet. (Camber and twist are new terms to me as I read about it.) The "simple" explanation seems to be big wind = car aft, less wind = car forward. With so many position options along the track I'm sure there are nuances to be considered. Anyone care to weigh in with a relatively basic description of what I should be looking for?
__________________
diane

S/V Desiderata

"The cure for anything is saltwater - sweat, tears or the sea."
djousset is offline   Reply With Quote
Old 14-07-2020, 10:55   #2
Registered User

Join Date: Mar 2013
Location: Slidell, LA
Boat: Beneteau First 375
Posts: 292
Re: Car position for jib sheet aft/forward

Assuming you have telltales on the jib luff - sail upwind with the jib sheeted in and all telltales streaming aft. Slowly turn upwind until the telltales start to flutter. If the top windward or bottom leeward telltale flutters first, move the car forward a little. If the top leeward or bottom windward goes first, car goes back a little. Goal is for all windward telltales to flutter at the same time.

Once you get that, you have a base position and you can make minor (couple of inches) adjustments for wind speed like you were talking about.
sandy stone is offline   Reply With Quote
Old 14-07-2020, 11:07   #3
Writing Full-Time Since 2014
 
thinwater's Avatar

Cruisers Forum Supporter

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 7,479
Re: Car position for jib sheet aft/forward

There are many good books on sail trim. While I'm sure you will get lots of good feedback, even the basics require a far more comprehensive explanation, with greater continuity, than is possible in a forum.


35 years into it, I'm still learning boat- and sail-specific nuances.



https://www.amazon.com/Manual-Sail-T...4749861&sr=8-2
__________________
Gear Testing--Engineering--Sailing
https://sail-delmarva.blogspot.com/
thinwater is offline   Reply With Quote
Old 17-07-2020, 11:39   #4
Registered User

Join Date: Jun 2020
Location: New England
Boat: Bristol 31.1
Posts: 53
Re: Car position for jib sheet aft/forward

I was taught to imagine a line perpendicular to the luff of the sail, passing through the clew and down the jibsheet. That would be the initial position for the car to maintain that perpendicular line, with adjustments plus or minus for uniform wind as sandy stone described.
gansett is offline   Reply With Quote
Old 17-07-2020, 12:53   #5
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 28,616
Re: Car position for jib sheet aft/forward

Quote:
Originally Posted by sandy stone View Post
Assuming you have telltales on the jib luff - sail upwind with the jib sheeted in and all telltales streaming aft. Slowly turn upwind until the telltales start to flutter. If the top windward or bottom leeward telltale flutters first, move the car forward a little. If the top leeward or bottom windward goes first, car goes back a little. Goal is for all windward telltales to flutter at the same time.

Once you get that, you have a base position and you can make minor (couple of inches) adjustments for wind speed like you were talking about.

The point being to have the shape of the foot about the same as the shape of the leech.


You can also do that by eye, or by the method Gansett mentions.


All my headsails have lines drawn from the clew which lets you set it at a glance.


Headsail trim is much less interesting than mainsail trim. I adjust the clews of both my jib and staysail with barber haulers, inboard and outboard, to have some modicum of control over the angle of attack, but it's a very meagre effort compared to what you can do with the mainsail on a boom, where you can make the sail fatter or flatter, and feather it, or bite it into the wind. Headsails, unlike mainsails, are basically "on", or "off".
__________________
"Parce que je suis heureux en mer, et peut-Ítre pour sauver mon ame. . . "
Dockhead is online now   Reply With Quote
Reply

Tags
jib

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Self tacking club footed staysail... vang or sheet car? pwillems Deck hardware: Rigging, Sails & Hoisting 6 29-05-2018 19:27
Forward or Aft for Main Cabin Star Hunter Monohull Sailboats 25 01-12-2014 09:10
Main Sheet Traveler Cleating- End vs Car Snore Deck hardware: Rigging, Sails & Hoisting 9 08-11-2012 14:37
Spinnaker - Aft Sheet Blocks JEFFREY20 Deck hardware: Rigging, Sails & Hoisting 0 07-02-2010 04:42
Replacing Sheaves on Gibb Genoa Sheet Car Cat-a-tonic Deck hardware: Rigging, Sails & Hoisting 6 18-08-2009 09:41

Advertise Here


All times are GMT -7. The time now is 14:35.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.