All things related to sailing: tips, howto, pictures of sailing boats, sailors, pirates and all

Main Sail Trim by the Tell Tales

Main Sail Trim by the Tell Tales

There's a great book called Mainsail Trimming by Felix Marks that goes into this in great detail. A lot of it doesn't apply to dinghies (travelers, for example). But one thing does - trimming the mainsail using the mainsail telltales.

The telltalls are on the leech (back edge) of the sail, and when sailing upwind from a beam reach  and forward (when the sail is a wing), the tell tales should be streaming, just like both of the jib telltales. But what if they aren't? For the jib telltales, we have the guidelines "move the sail toward the telltale that isn't streaming" or "move the tiller toward the telltale that isn't streaming", and students seem to get that. But I don't think we talk enough about trimming the mainsail using the telltales (I could be wrong here, just my observation).

So (on a beam reach and above), if the mainsail telltales aren't streaming, they're curling to one side--windward or leeward. That's just like one of the jib telltales not streaming while the other one is. Move the sail that direction (as in, ease out if streaming to leeward and trim in if streaming to windward), or move the tiller that direction. Essentially the same thing as you would do to trim the jib.

I've seen a tendency in students to oversheet the main, so I think it's useful to sensitize them to this, and the mainsail telltales are one way to do this.

You can also use the mainsail telltales in a gybe. I went on the water once with Stefano Maffuli and a friend of his who had been head instructor at St. Francis Yacht Club (grazie, Stefano). He said that the mainsail telltales were the best indicator of when to pull the main across in a gybe. They show exactly when the main is back-winded--a much better signal than the jib coming across.

8381 Hits
0 Comments

Tips for skippering with crew on the wire

Tips for skippering with crew on the wire

Almost all of Cal Sailing's dinghies are equipped with a trapeze kit, and with good reason: our typical stiff summer breezes make it all but a necessity to send someone out on the wire. Having crew out on the wire  can be tons of fun for both you and your crew, but can also be quite a challenge. Here are some tips which can help.

Let's assume that you as skipper have two goals:

  1. Move the boat upwind as quickly as possible.
  2. Make your crew feel comfortable on the wire.

Now, your crew will probably be most comfortable if the boat is kept relatively flat, sudden changes to heel angle are avoided, and the crew is not required to shift her weight. In other words, she can calmly stand on the rail doing nothing but admiring the view (and calling out gusts and lulls).

On the other hand, in order to make your boat move upwind as quickly as possible, you want to keep the boat flat, and to keep  your close-hauled jib at the proper angle of attack to the wind, so that it neither stalls nor luffs.

You, the skipper, have three controls at your disposal: tiller, main sheet, and your body weight. So how do you keep both your crew and the boat happy? Firstly, steer with the tiller to keep the jib at the proper angle to the wind. Secondly, use a combination of body weight and main sheet trim to keep the boat flat. In practice, it is a good idea to hike out moderately and then trim the main accordingly. Indeed, the more you power up the main (while keeping the boat flat), the faster you go. Furthermore, if the wind comes up or down, you still have two controls at your disposal: in a gust, dump the main and hike out hard, and in a lull, sheet in and shift your weight leeward.

...
Tags:
Recent Comments
Michael Sherrell
So this technique requires you to distinguish between a wind puff and a wind shift when you suddenly get an increase of heel, does... Read More
Friday, 05 September 2014 14:08
Michael Sherrell
Gives me something to work on, for sure.
Friday, 05 September 2014 14:13
Stefano Maffulli
Waves also play a role in changing the apparent wind: when the bow nose dives into a wave the boat may slow down changing the appa... Read More
Friday, 05 September 2014 14:38
Continue reading
5867 Hits
7 Comments

Single-Handing in High Wind

Single-Handing in High Wind

Most senior dinghy tests involve assessing the skipper's ability to single hand a dinghy in high winds. And indeed, this is an essential skill. Imagine that you're out in the South Sailing Basin on a beautiful summer afternoon. It's blowing 15 knots, and you and your crew are hiked out all the way when suddenly the hiking strap breaks, and your crew ends up in the drink. (See e.g.  http://youtu.be/ZZTwH8C5bjo for an excellent demonstration by our current Commodore). If you can't pull off a single-handed crew overboard maneuver, your crew will end up on the rocks by Emeryville while you wait for the rescue skiff to arrive.

Here are a couple of pointers which will help you single-hand like a pro.

Depowering the sails. Unless you have the stature of an NFL linebacker, chances are that you will have difficulty keeping the boat flat unless you take some steps to depower the sails. Reefing the main and furling the jib are good starting points. Tightening up the luff of the sail with the Cunningham and/or reefing line will help to flatten the sail, reducing its heeling force. Loosening up the vang or gnav will allow the head of the mainsail to twist and luff, all the while keeping the bottom of the sail powered up.

Balancing the boat. Balance is always key in sailing. Since you no longer have crew in the boat, you'll have to use your own weight much more effectively. Moving forward is essential; otherwise, the bow of the boat gets battered around by waves. Aggressively hiking out will help keep the boat flat. If you're lucky enough to be wearing a harness and your tiller extension is long enough, you can even go out on the trapeze! 

Tacking and jibing. Tacking a dinghy while single-handed in high wind can be quite challenging; large swells crashing against the bow of the boat tend to slow the boat before it passes through irons, causing the tack to fail. Furling the jib and loosening the vang as suggested above compound the problem, as the boat no longer points as high. In some situations, jibing the boat is the only viable option for switching tacks. For this, loosen up the vang (if this wasn't already done), and start the jibe with a maximal amount of boat speed. You'll have to aggressively use your weight and the tiller to keep the dinghy from rounding up and broaching.

...
Recent Comments
Michael Sherrell
If things look too hairy, consider capsizing immediately and hoping the COB can make his/her way to you. Although usually when som... Read More
Monday, 22 February 2016 11:02
Nathan Ilten
Great suggestion, Mike. Even better: anchor. If it really is that hairy, chances are that your capsized boat will still be moving ... Read More
Tuesday, 23 February 2016 11:10
Michael Sherrell
If you're trying to tack and nearly make it but not quite, chances are at the highest point you reach you will start being blown b... Read More
Monday, 25 July 2016 10:38
Continue reading
6481 Hits
3 Comments

Use The Force

Use The Force

When we sail we use all our senses, but the one we rely most heavily on is our sight.  This was brought home to me when I took my first Wednesday night keelboat lesson several years ago.  I had grown accustomed to using the telltales on the shrouds to get a general sense of the wind when sailing the dinghies.  I even carried some bits of yarn in case the boat I was on didn’t have any.  I took the helm on the keelboat on a dark night and--oh crap--I couldn’t  see the tell tales.  I struggled that night, but realized that what had started as an aid had become a crutch.

The last Monday night advanced dinghy class, we worked on sailing without any sight at all.   But you don’t need a class to try it.  First make sure you have decent crew who is not blindfolded, and that you’re in an area with a lot of space (few boats and no obstructions).  Pick a day with moderate wind.   Put a blindfold on and try to hold a course.  Your crew can give you feedback.  Try to feel the puffs of wind before they hit the boat.  Pay attention to the balance of the boat.  Listen to the sound of the boat moving through the water.  Play with the main sheet.  Can you tell when the boat accelerates and decelerates?  Smell your gear, yeah, you should probably wash it.   Try sailing different points of sail.  If you’re feeling confident try a tack.

It’s as easy as bagging womp rats back home in Beggar’s Canyon.

Recent Comments
John DuMoulin
Thats a great idea! I used to do that when I was learning to windsurf. If I was having some inexplicable problem with sailing diff... Read More
Tuesday, 08 July 2014 16:34
John Bongiovanni
This was a great exercise in the advanced dinghy class. I figured out that the tension on the mainsheet was the clue. Head up unti... Read More
Friday, 11 July 2014 21:25
Michael Sherrell
Very useful comment, John. I was there but I didn't figure that out. By the way, Seamus, what the f*** is a "womp rat"?... Read More
Sunday, 13 July 2014 11:23
4091 Hits
4 Comments

Friday the 13th Cruise to Clipper Cove

It was Friday the 13th, and a full moon. What better time to go on a cruise; what could possibly go wrong?

Eleven sailors in five dinghies left the dock at about 4:30pm. A little later than the announced departure time, but about when I figured we would actually shove off. The wind was very light in the junior area but picked up to a lovely 10 knots or so once we got a bit past the restaurant. We had a pleasant and uneventful sail to Treasure Island, and pulled our boats up on the little beach at Clipper Cove. Of course we had the traditional capsizing of the last boat to arrive.

b2ap3_thumbnail_cruise-10.jpg b2ap3_thumbnail_cruise-boats.jpg

[Left: Josh Leihe and Auric Horneman taking down the last Bahia; Right: CSC boats beached at Clipper Cove]

With the boats pulled well above the water line, we made the short walk to the Treasure Island Bar and Grill. I don’t know about everybody else, but while I enjoyed my food I kept thinking: I hope the wind doesn’t die, I hope the wind doesn’t die, I hope the wind doesn’t die. After eating, kibitzing and telling lies about how fast we had sailed there, we walked back to the boats. I looked out over the water and, you guessed it, the wind had died. Now, this wasn’t the end of the world. We had the sketch motor mounted on the Venture, but it was going to be a slow slog back with a 2 horsepower motor and 5 boats. As we looked despairingly eastward at the glassy water, what did we see? Could it be? Yes, it was Michael “The St. Bernard of the Sea” Moore coming towards us on the rescue skiff! He brought the skiff up to the beach and casually asked “Do you guys want a tow?” We got the boats off the beach, and Michael maneuvered around so we could each attach our bow painters to the tow line.

...
Continue reading
3152 Hits
0 Comments