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Advanced Dinghy Lessons Start with a Bang!

Philippe on the subject of sail trimming and especially use of the gnav (according to him, an under-used tool).

Philippe is an an incredible sailor and an amazing instructor.  We spent about half of the time on land with an RS Venture looking how the various sail controls affected sail shape and talking about what sail shape you want for what conditions (it was blowing over 15 kt. this evening, by the way, with pretty big seas - we  had a lot of weight on the boat on land to make sure it didn't capsize into the cars parked near the clubhouse). On land, it was much easier to see the effects of various controls on the sail shape.

This is my lesson summary (feel free to comment):

Scope: Dinghies which generally don't have travelers.

  1. Sail shape is very important. The usual things about depth and power, and location of sail draft. With lighter winds, you want a fuller sail and a draft a bit aft. With heavier winds, you want a tighter sail and a draft forward.
  2. In heavier seas, you want more power, even with stronger winds.
  3. Tensioning the Cunningham brings the draft forward.
  4. The outhall affects the lower third of the sail.
  5. Several controls bend the mast aft, which tighten the sail and move the draft forward. Tightening the mainsheet and the gnav do this.
  6. In high winds, you don't want the boom near the center of the boat, as the lift from the sail is mostly sideways to the boat. But just easing the mainsheet induces twist in the sail. Tightening the gnav overcomes this, allowing the mainsail to go to a better angle, but preserving the sail tightness.
  7. Bearing off from close-hauled, you want to do several things.  One is ease the mainsheet. Another is to keep weight on the windward side to help turn the boat downwind. A third is to ease the gnav (and then tighten it when on course).
  8. Gybe-ing:
    1. Blow the gnav before the gybe (this will depower the sail and cause the top of the sail to back-wind before the bottom of the sail, producing a gentler gybe).
    2. Weight the boat to windward to turn it down-wind through the wind. If you reach across to pull the boom across, you'll mess this up.
    3. If done correctly, the wind will gently pull the mainsail across. Grab the sheets as this happens to buffer it.
    4. Power up after the gybe by tightening the gnav

Then we went out and did it, both upwind and downwind. And it worked. I was prepared for hikiing really far out with the winds we had, but we didn't have to. And it was amazing how gentle the gybes were with this technique. Note that in bearing off and gbye-ing, you're doing what you would do rudder-less - moving weight to turn the boat. After the class, I discussed that with Philippe, and  his opinion (as a racer of some renown) is that the more you can use your weight to  maneuver the boat, the better (i.e. faster) you'll sail.

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John Bongiovanni
I want to add a couple of things to this. One is that I talked with Philippe today and asked hiim if I got it all right. He said ... Read More
Wednesday, 22 April 2015 19:52
Francisco Kattan
Thanks to John and Philippe for the great writeup and lesson. I've got some new things to try, especially releasing the gnab du... Read More
Thursday, 23 April 2015 18:07
Christian
Great stuff. Thank for the post!
Thursday, 23 April 2015 18:56
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There be dragons here!

There be dragons here!

While you spoiled Californians may have been venturing out onto the water all winter long, most of us in Vancouver are just starting our sailing season -- we don't like frostbitten toes! This past Saturday, I had the pleasure of crewing on a Dragon in a one-design regatta. The Dragon is a "modern classic": designed in 1929 with extremely elegant lines, this 29 footer has been updated again and again to remain an exciting keelboat. She has a furling jib, a symmetric spinnaker which launches from a chute below deck (very similar to our Bahias), and really feels more like an incredibly large dinghy than a keelboat. Her RYA handicap puts her just a bit slower than a 470, so she would destroy one of our Bahias in a race.

This was my first time racing on a keelboat, and I don't know why I waited so long to do it! It was fascinating to see a keelboat set up for racing, in contrast to our Commanders which are set up for, well, pretty much the exact opposite of racing. Did somebody say "spinnaker practice?" I must have hoisted and doused the kite ten times, and I can't even count the number of times we gybed with it up. At the beginning of the day I was just concentrating on not wrapping the jib sheets around the spinnaker pole, but by the end of the day I was doing end for end gybes on the foredeck fairly smoothly. As they say, practice makes perfect. Even with my bumbling help, our Dragon "Rum 'n' Monkey" managed to place solidly in the middle of the fleet. I look forward to honing my skills throughout the summer; I think once our crew of three gets dialed in, we'll be unstoppable (or at least close to it).

If you ever get a chance to sail a Dragon, I recommend you take it -- they are pretty fun boats! But even more importantly, all you aspiring dinghy sailors should take any opportunity you can to crew during keelboat races. It's fun, and you'll learn a lot, including many things which will improve on your dinghy sailing. Fortunately, Friday evening racing at Berkeley Yacht Club has just started up for the season. If you show up at O-dock at the Berkeley marina around 5:30pm any Friday evening (dressed to sail and with a six-pack for after the races) chances are you'll get a crew spot on a boat. It's a chance too good to miss.

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Lester Gee
Dragons are gorgeous boats. Saw them racing during my brief stay in Seattle. Similar boat you can find here locally are the Colu... Read More
Thursday, 16 April 2015 08:34
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Man Overboard on Dinghies

There are at least 4 ways of doing this, and all of them have their advocates  (which means that there are advantages and disadvantages of each, and each is optimized for different circumstances). 

I think most instructors at the Club teach the Broad Reach (or Deep Beam Reach) procedure.

1. Immediately go to a Broad Reach
2. Sail for a small number of boat lengths (it doesn't matter how many, just get far enough away from the MOB to give you room to maneuver and sail back)
3. Tack around, furl the jib
4. You're on a close reach, slow-sail to the MOB

b2ap3_thumbnail_MOB-Broad-Reach.png

Advantages:

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Michael Sherrell
1. Picking up MOB on downwind side of boat or over transom only works if MOB is conscious and functional. To haul them in with bru... Read More
Wednesday, 11 March 2015 08:26
Stephanie Evans
While Quickstop makes a lot of sense theoretically, the reality of crew going over board is typically a high wind situation where ... Read More
Monday, 16 March 2015 14:08
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Leaving J-Dock

Leaving J-Dock
So, you're getting ready to take a keelboat out for a sail.  You have three goals in mind for getting the boat ready and departing the dock:
1) Safety of you, your crew/guests, and other marina users;
2) Avoiding damage or excessive wear and tear to your boat and others nearby; and
3) An efficient and enjoyable preparation and departure so that you get out sailing quickly and without unnecessary stress.  

It might seem that these goals conflict, and that in order to prioritize goals 1 or 2, you might have to sacrifice goal 2 or 3.  Sometimes, that happens. But that should be the exception, not the norm. The point of this post is to offer a big picture framework for how you can meet all of these goals at once.  Note that this is NOT a comprehensive checklist - your checklist fits within these steps (mostly in step 2).  

  1. Choose your equipment (boat, jib) based on conditions, your crew members, and the goals of the trip.  You probably have thought about these factors before you even get to J-dock, but be ready to reconsider your plan if conditions are different than you expected.  Remember to consult the maintenance log.  
  2. Prepare the boat and your crew while doing everything except raising the sails (raising the sails comes last).  While you and your crew are doing safety checks and getting everything set up, you should be thinking at least as much about your crew as you are about the boat, especially if you have not sailed with the crew much on the keelboats.   
    1. Ask questions about each person’s experience and comfort with the boat and conditions.  
    2. Give each person tasks to help with preparations.  Watch how they complete these tasks, and ask questions.  Do they demonstrate skill and familiarity with the equipment?  Are they comfortable moving about the boat?  Are they clumsy?  Give pointers as needed.  Evaluate who your most and least skilled crew members are.  Is there anyone that you will need to pay extra attention to in order to ensure their safety and comfort while sailing?  
    3. Does everyone have appropriate gear (foulies, whistles, lights, water, etc) for the activity and conditions?  
    4. Do you need to change the plan, equipment, etc based on what you’ve learned about your crew?  Do you need to get one (or more) skilled crew members?    
  3. Include everyone in a brief discussion about safety on the boat and the departure process.  Consider asking one of your more experienced crew members (any senior wannabe) to give the safety talk and propose a plan for departure.  Give feedback.  Make sure that everyone understands their role for the departure plan.  Does the dock person know how to step on?   Encourage questions! Take your time answering.  It’s best to handle questions before the sails are up because it is quieter, calmer, and avoids unnecessary wear and tear on the sails.  
  4. Take off all dock lines except for the one(s) you’ll need to keep the boat in proper position while raising any appropriate sail(s), given the wind direction.  Reposition the boat, if needed.  Raise the sail(s) and cast off.  Have crew help to avoid rubbing the boat against the dock while repositioning and raising sail(s). Be safe and have fun!  
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Low Tide Launching/Docking

Low Tide Launching/Docking

We've all experienced this, either as sailors or instructors.

You're going away from the dock, parallel to it, but somehow you're getting pushed sideways into the middle dock. Or you're docking, and you have a huge amount of leeway, pushing you into the seawall.

What I learned in the Advanced Dinghy class from Yves is that it's all about sail trim. Even with the centerboard completely down, you have a huge sideways force if you oversheet. Not only is the sail not as efficient as it could be, but the force is more sideways than forward. With the centerboard up (for low tides), the effect is worse.

This is the season of rip-roaring tides (it can go from more than 6' at noon to negative '1 at 6 pm, and the dock time has been as early as 3:30 some weeks).

Thanks to what I learned from Yves, I've been doing the following in my lessons when we had to dock with less than full centerboard. As soon as we get away from the dock, I raise the centerboard, and we sail, completely focused on sail trim. Jib is easy, mainsail more difficult (but more important). I try to get the students completely focused on sail trim. I tell them "They'll tell
you that you can't tack without a centerboard, but they're wrong" after they've tacked without a centerboard.

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