Lower Telltales

Status
Not open for further replies.
May 11, 2004
273
RAPTOR Hotfoot 20 Ghost Lake
I have a new loose footed,full batten main that I haven't sailed yet. My old sail had telltales on only the top two battens and I know how to fly them. This new sail has telltales on all four battens. Are the bottom two important and if so, what controls are used to adjust them without messing up the top two? I think only the cunningham and outhaul have much effect on the bottom third of the sail. I know the cunningham will effect draft position and the outhaul will effect draft depth and twist in the bottom third pretty much doesn't exist, so should I even be looking at these things? I could fool around when I get on the water but I'd like to have as much information as I can beforehand.
 
R

richard

I would like to know too!

Just got a new full battened main as well (I love the sail), but would like to also know about the leech "tell tales" (ribbon handing off the back of the sail). Should all the tales be flying straight back off the leech? If so, then the "when in doubt let it out" applies to me big time, as I am know letting my main sail out further than I did with my old sail It seems to be going a little faster but I have no speed meter so can't quantify.
 

Alan

.
Jun 2, 2004
4,174
Hunter 35.5 LI, NY
Telltales

These little ribbons are critical indicators of air flow over the sail. Without them there is no effective means to know 'how' the air is moving over the sail surface. The more telltales there are on a sail the better a trimmer can 'read' the sail and trim for best performance. Not only are telltales needed the entire height of the leech, but a number of them reaching from luff to leech about 2/3 the way up the sail are an added indicator that the trimmer can make effective use of. Any time you see a sail without telltales you realize the trimmer has no knowledge of how his sail is performing because he has no indicators to read. Imagine trying to drive down the highway without being able to see out the windshield. PS, telltales are just as necessary on the genoa
 

jimq26

.
Jun 5, 2004
860
- - -
Trim the mainsail until 2nd or 3rd telltale breaks

The 2nd or 3rd telltale from the top (usually located at the 2nd batten on most boats) is the most critical to pay attention to. Trim to the point that it is occasionally breaking and trying to hide behind the sail while the others stream straight.
 
Feb 26, 2004
23,355
Catalina 34 224 Maple Bay, BC, Canada
? Why should be any

different? It's the same boat with most likely the same jib. So what's the difference in the mainsail set with an in-mast furling system that should make reading the telltales any different? Just trying to learn.
 
Dec 28, 2006
25
Beneteau 473 San Francisco
Top tell tail critical to proper main trim

The top batten tell tail is a very important indicator to proper trim. If it is breaking to leeward, you have poor airflow. If all are streaming aft, you are okay. In order to get the top tail to stream aft, you'd need to loosen up on the leech, which will help create proper twist. Set proper mast bend (if you have adjustable backstays), draft and chord/depth based on wind conditions. Helps to check the slot, too. The only time it is okay to let the top tail flutter to leeward, is when fetching up to a mark or trying to climb to weather of another boat. Think about it this way. If airflow at the top of the sail catches the leech and curves around to the leeward side of the sail, does that sound efficient? It is correct that the cunningham will move draft forward, and the outhaul will affect chord/depth ratio. General rule of thumb: super light air - set the anchor, pour cold beverage light air 8-12kts apparent - draft in center of sail medium air 12-19kts apparent - draft forward to 40%, flatter leech heavy air 20+kts apparent - draft forward to 40% with increase in chord/depth ratio. Flatten the upper 2/3rds of the main to decrease healing force.
 
May 11, 2004
273
RAPTOR Hotfoot 20 Ghost Lake
Hey Guys

I appreciate the replies but I know how to trim the top tell tales. It's the bottom two I don't know anything about.
 

jimq26

.
Jun 5, 2004
860
- - -
OK - go to this site and read carefully.

This should tell you why you want your bottom two telltales steaming straight back when on a beat (and so on).
 
May 24, 2004
125
Ericson E-23 Smith Mt. Lake
Reading tales

I have the same set-up - loose-footed main, 4 full length battens. Mine is a masthead rig - I assume yours is too. I've had best results doing things in this order on a close reach: Set the traveler (to get the boom on center) as appropriate for conditions (moderate to heavy air, lower (closer to amidships); light or very heavy conditions, higher. Get the two lower tell-tales streaming well first (with the trav), then worry about the uppers. No read on the uppers is really valid until you have the foresail trimmed well. Now set the uppers using the mainsheet - if they are tucking back in behind the sail, ease it some. It is most difficult to get the top one streaming, and if the wind is really up and the foresail is pulling strongly, the top one (or sometimes two) aren't that important on a masthead boat - if they are flicking and the boat feels fast and balanced, somethimes that's the best you can do. You can investigate outhaul tension and cunningham settings, but they won't have a lot of effect on tell-tale performance. In my opinion most mainsails are supplied with top battens that are too stiff - make a couple of more flexible battens to replace the top two for light air days, and you will be pleasantly suprised at the improved sail shape. When the sails are well trimmed the boat should have a nice light responsive feel with minimal helm pressure necessary to keep her on course - if you are carrying much more than about 5 degrees of helm offset, or if it feels heavy, then no matter what your tell-tales say, the boat is not balanced. When we tack I ease the outhaul a little (for acceleration), set the traveler by the lower tales, check the uppers and adjust the mainsheet as necessary (because by that time the headsail trimmer has the genoa where it should be,) then tighten the outhaul as appropriate when speed builds back up. That can all be done in less time than it takes to say it.
 
Status
Not open for further replies.