sail-world.com
 
 
News Home Video Gallery Photo Gallery
Sail-World.com : The Byte CII tuning parabola
The Byte CII tuning parabola


'Byte CII upwind'    Byte Class

The Byte CII World Championship is headed to Newport, Rhode Island this summer, with a host of clinics and regattas leading up to the event. While many of the traditional dinghy classes rely on the vang to induce and maintain mast bend and a flat sail, the Byte CII does not. This makes the boat unique in terms of tuning and sail trim compared to the traditional dinghy classes. To help you train for the Worlds this summer, here is a basic overview of trimming the Byte CII’s sail across different wind ranges.

The Byte CII was specifically designed by Ian Bruce to fit a weight range, as opposed to an age group or gender. Furthermore, the design is conducive to a large weight range (110 lbs. – 160 lbs.). The sail is made of Mylar, instead of Dacron, and is fully battened. When coupled with a tapered, carbon fiber mast, the cunningham carries the load effortlessly to the top of the sail, allowing you to bend the mast and flatten the sail. What this means to sailors coming from other traditional dinghy classes, is that you never use the vang upwind, because doing so will add unnecessary tension to the leech. Other traditional dinghies require this tension, as the vang is the only control that allows you to bend the mast and flatten the sail effectively. This is not the case with the Byte CII.

The golden rule, for tuning a Byte CII upwind, is to achieve the desired sail shape while keeping the boom over the back corner of the boat. When applying cunningham, the mast will bend, and the boom will move outboard. When easing cunningham, the mast will stiffen, and the boom will move inboard. To counter the boom’s movement from the back corner of the boat, you may use either the mainsheet or the traveler, depending on the wind conditions.

The traveler is the second large game changer from the traditional dinghies. The traveler’s role in the Byte CII is to allow you to effectively position the boom over the back corner of the boat with the ideal sail shape for the conditions. In other words, it allows you to effectively control your leech tension for different conditions, via the mainsheet, while keeping your boom in the ideal place for speed and pointing (the leeward rear corner of the boat).

Thus, in the extreme conditions (light and heavy air), where you generally ease the sheet out, you will pull the traveler to windward, pulling the boom back over the corner to maintain your pointing. Thus, the sheet is allowing you to control your leech tension, while the traveler controls the sail’s angle to the wind. In medium air, when you need more power in the sail, and generally would pull tighter on the sail, the traveler drops as far as the centerline of the boat, allowing you to apply just enough tension on the sail to prevent you from spilling much wanted power out of the top.

Because the Byte CII is designed for such a broad weight range, it is important to look at the suggestions below as general guidelines for your level of control upwind. What a 110 lb. sailor does in 15 knots will vary significantly from what a 160 lb. person will do in 15 knots.

Byte CII upwind -  Byte Class  

Light Air

You will sail with no cunningham (or just enough to pull the horizontal creases out of the sail), will pull the cunningham far to windward, and will ease the sheet to the corner of the boat. Your sail will look relatively full, and pulling the traveler to windward will give you more room to ease the sheet to the corner and open the leech. The tell-tale on your top batten should look like it is trying to go forward 50% of the time, and should fly straight back the other 50% of the time (50/50 rule).

Medium Air

As you are fully powered up and under control (butt over the rail or light hiking), you should set the traveler more towards the center of the boat. You will pull the Cunningham just to the point where you have no creases in the sail. This will move the boom outboard, and you will compensate by trimming the sail to the corner of the boat. The 50/50 rule applies here as well.

Medium Heavy Air

As the Byte CII is a small and physical boat, there is a wind range, where if you hike hard enough, you may want to continue to keep some power in the sail. For the stronger and heavier sailors, I find this may go as high 15 knots or so. In this wind range, you will have the cunningham maxed out, the traveler center lined, and the main trimmed to the corner. If the boat is flat, and you have no helm, this setup will give you tremendous height and power. This will ONLY work if you are hiking hard, and have no helm. The instant you are no longer able to maintain a neutral helm, you should start moving to the heavy air setup. This will happen much earlier if you are sailing in waves and later in flat water.

Heavy Air

As you get to the point where hiking is no longer enough, the Byte CII gives you another setup to keep the lightweights in the game. Once the cunningham is maxed out, and you start dumping the sail to keep the boat flat, start to move the traveler back up to windward. This allows you to dump the sail to the point where you are under control, while keeping the sail in the corner of the boat to maintain your pointing. Without having to use the vang, you are able to do this without applying any tension to your leech, making depowering easy and effective.

The Parabola

Light – Traveler up; sail out; cunningham off or variable
Medium – Traveler down; sail in; cunningham variable
Medium Heavy – Traveler down; sail in; cunningham strapped
Heavy – Traveler up; sail out; cunningham strapped

Zim Sailing


by Zim Sailing

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=112991

4:46 PM Sat 20 Apr 2013GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.


Related News Stories:

27 Jul 2013  Byte Open at Combs SC
11 Jul 2013  Byte CII dinghy and Techno 293 Continental Championship dates revealed
26 Jun 2013  Byte CII in Australia - demo program
26 Jun 2013  BYTE CII set for 2013 World Championships in Newport R.I.
20 Jun 2013  Zou Inter Marine – now with added Byte
14 May 2013  Byte and Firefly open at West Oxfordshire Sailing Club
30 Apr 2013  Australia’s first Byte CII Regatta
21 Apr 2013  The Byte CII tuning parabola
17 Mar 2013  Singapore Youth Olympic Festival - Day 1 in Marina Reservoir + Video
01 Mar 2013  The next amazing singlehanded class, the Byte CII
MORE STORIES ...






News - USA and the World





































America's Cup Book Review: Winging It - Oracle Team USA's comeback *Feature by Richard Gladwell Sail-World.com/nz,




Rolex China Sea Race 2014 - nip and tuck for IRC honours by RHKYC and Guy Nowell, Sail-World Asia, Hong Kong


























HUD Vision: An interview with Afterguard Marine’s Alex Moret *Feature
ISAF Sailing World Cup Hyeres - US Sailing Team ready for action
Volvo Ocean Race - Dongfeng Race Team first official qualifier
Springtime boat buyers need to take care of a few key things
ISAF Match Race Rankings for 16 April 2014
ISAF Sailing World Cup Hyeres – World’s best to race on French Riviera
Rolex China Sea Race – Fleet off to a clean start
America's Cup: Expected de Ridder penalty should be reduced *Feature
World Youth Sailing Week – Second edition officially presented + Video
Rolex China Sea Race - Sailing classic returns
Les Voiles de St Barth – Fired up for battle
CNN Mainsail Down Under for the 75th JJ Giltinan Trophy - 18ft skiffs
Volvo Ocean Race: North Sails on outfitting the Volvo 65
Image gallery: James Cook High's Royal encounter on Steinlager 2 *Feature
Volvo Ocean Race - Maersk Line named shipping partner
Congressional Cup - Victory for Taylor Canfield and crew
SSV Oliver Hazard Perry joins America's Tall Ship fleet + Video
2014 Halifax – Saint-Pierre Ocean Race
Oyster Regatta Antigua - Glorious conditions prevail on final day
WWA Pro Card Qualifier - Pro Cards earned at Freedom Wake Park
Christmas Caribbean Rally - Top class sailors to compete   
Earth Day boater tips   
Anna Tunnicliffe - from CrossFit to Extreme 40's   
Charleston Race Week - Photos by Chris Howell   
Image Gallery: Stratis SL33 flies on the Waitemata   
Audi Melges 20- Sperry Topsider Charleston Race Week - Light final day   
Clipper Round the World Yacht Race - PSP Logistics prepares for USA   
ISAF Sailing World Cup Hyères - Crème of the crop to compete   
Congressional Cup: Luna Rossa makes podium in first event   
Int 14 World Championships 2015 launch new event website   
International Optimist Regatta Clinic and Team Race - Register now!   
Congressional Cup: World top rankers finish that way in Long Beach   
Sperry Top-Sider Charleston Race Week Day 3 finale   
America's Cup: Gino Morrelli outlines the new AC62 design   
Doyle Sails New Zealand signs Andrew Brown as One Design Manager   
America's Cup: Dean Barker's Blog - A sail with the Duke and Duchess *Feature   
29er World Youth Sailing Week Easter regatta - Day 1 and 2 overall   
C Thomas Clagett Jr Memorial Clinic/Regatta - Entries start to roll in   
50th Congressional Cup: See the delayed coverage and media conferences   
Clipper Race 10 Day 27: Closing stages - Qingdao to San Francisco   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
X6XL NEW US