From: Steve & Sally-Anne Alloway [real-entertainment@xtra.co.nz]

Sent: 2 July 2008 12:25

To: Steve & Sally-Anne Alloway

Subject: FW: yachtyakka

J J J J J J J J J J

If you can't see any pictures, please configure your email program to display images.

Watch this space J

This issue of Yachtyakka is collected from:

Dave Culp SpeedSailing

Hilary Lister

Yachtyakka will be going to a new level J very soon

Yachtyakka

Yacht Profile

This new design was drawn up for an American client who plans to race short handed in various Offshore events in the USA. The client is urgently building her for a 2009 launching. Home built from Kevlar and Carbon over a Foam Core, the hull and deck will be light, strong and stiff.

A carbon spar will further allow as much weight to be put in her bulb as possible. The key to all these racing yacht projects is ‘ power to

weight’ and ‘righting moment’. If both can be maximized, then excellent speed and performance will result. Twin transom hung rudders will be utilized, similar to the Open 650’s that race in the Mini-Transat crossings. A lifting keel with bulb allows for trailering to various events. The sailplan is well balanced and powerful with a masthead and fractional gennaker complimenting the Squaretop main and a 100% headsail. The Gennaker is flown off of a protruding prod that is pulled in when not in use. All sail handling controls are within the confines of the cockpit which has been laid out for shorthanded sailing. Interior is minimal but functional for longer offshore events. Further info available on request.

Dibley 800 Specifications

LOA 8.200 m 26’ - 11”

LWL 7.920 m 26’ - 0”

BEAM 2.718 m 8’ - 11”

DRAFT [max] 2.000 m 6’ - 6”

DISPLACEMENT [sailing] 1,380 kg’s 3,042 lb’s

SA/DISP RATIO 36.25

DISP/LENGTH RATIO 77

http://www.youtube.com/watch?v=CIuGoT7WoKc&feature=related

Yachtyakka

Speed Sail Profile

Why Kites?

While kite powered sailing is obviously an unusual, exciting new approach to sailing, what's the advantage? Why put up with launching hassles, light wind problems, and traffic nightmares to fly these odd prime-movers? Put simply, it is because they are capable of far more power than conventional rigs. Kitesail boats are potentially the fastest form of soft water sailing known to man.

There are three major advantages to kite rigs as compared to conventional sailing rigs. First, since a kite flies some 50-150 feet above the water, it works above the turbulent boundary layer of wind over water that conventional rigs must deal with. This provides cleaner, less turbulent air flow at significantly higher velocity than on the surface, as much as 15-30% higher. As power derived from the wind varies with the square of the wind speed, 25-70% more energy is available to the kite, all other variables being equal.

Second, as any boat and its rig increases speed, the apparent wind both draws forward and increases. Very efficient boats use this effect to "make their own wind." As actual airflow over the rig increases, power derived from the rig increases dramatically, allowing further acceleration, again increasing apparent wind, and continuing the cycle. Efficient boats under optimum conditions are able to attain boat speeds 2--2 1/2 times the true wind speed. However, a conventionally rigged boat must accelerate both the hull and rig together to gain this additional power. Unless the boat is very efficient at low speeds and optimized for high speed as well, the limited power available will be insufficient to accelerate the boat into high speed regimes.

A kite rig, which is independent of the hull, can accelerate to several times the wind speed before the hull begins to move (and thus the characteristic zig-zag or figure eight course of the kite stack). The kite rig is often capable of generating 4-8 times the force of a conventional rig of the same size at zero hull speed. This effect is in addition to the increase in power due to altitude. While this advantage decreases as hull speed increases, it is very useful at slow speeds to, for instance, bring a planing hull or hydrofoil supported hull up onto its feet. Also, at practical boat speeds (up to 2x windspeed), an efficient kite is still capable of exceeding boat speed and thus the effect is still very beneficial.

Third and most dramatic, the tensile force from the kite rig can be applied to the hull at any location on its surface. By moving the attachment point to the leeward rail or even the leeward waterline, a boat can be built which does not heel. This theoretically allows a designer to put a very large rig on a tiny hull platform with minimal regard to stability. In practice, it is possible to precisely balance rig forces and hull sideforces to result in no residual pitch, roll, or yaw moments; only pure forward drive!

This means that the boat can be made self-steering without rudders. It needs no fixed or live ballast, no transverse displacement of buoyancy, and no reserve buoyancy at all. As speed and thus rig/hull sideforce magnitudes increase, the effects of gravity and wind waves become relatively trivial, and the boat becomes more and more stable. It feels like it's "on rails" even in extreme wind and sea states.

The kitesailing story isn't all milk and honey, of course. There are very real practical considerations. The extremely large overall size of the boat--the rig is as much as 200 feet away from the hull--leads to handling difficulties even in relatively uncrowded waters, not to mention bridge clearance. Currently available kites, while marvelously efficient and strong, are mostly incapable of launching or landing on water. They require either a beach launch or tender assisted launch and relaunch. Actual sailing is tricky and arduous if shorthanded, as the skipper's attention is divided between flying the rig and sailing the hull.

Kitesailing is truly an emerging technology sport. There will be huge advances in the near future in both technology and technique in this exciting new field.

Yachtyakka

Real Entertainment

Sailability Profile

How do you sail a boat if you can only move your head?

The first ‘sip-puff’ system used on a boat was developed in Canada for the small Martin 16 keelboat.

All functions, including setting the sails and steering the boat, are controlled by the sailor’s breath. By sucking or blowing down two straws, one to sheet in and out the sails, and one to move the rudder from side to side, the helmsman is able to control their boat entirely independently via a series of motors and winches.

The sip & puff interface is a chest-mounted control “stalk”. The stalk positions two pneumatic “straws” within reach of the sailor’s lips.

Sip & Puff

Hilary’s in control…

When she’s on the water – fair weather or foul - Hilary’s in control. Seated in a custom seating module that maintains her body position and comfort, Hilary controls everything on her thoroughbred Artemis 20 - with her breath – through an innovative Power Assist System. A "control stalk" positions three pneumatic "straws", ready for her breath commands as a "sip" or a "puff" semaphore. These straws are connected to sensitive pressure switches on a computer, programmed to do exactly what Hilary needs to do. The control computer and its graphic displays are housed in a watertight module mounted in front of Hilary, like the instrument panel on your automobile. A gentle "sip" or "puff" on one of these straws is interpreted by the control computer to update the status display and then activate electric servo motors that change the course of the boat, trim one of the sails or control the navigation computer.

Hilary’s Round Britain route requires long passages across open water, where keeping the boat on course is demanding for any sailor. Raymarine have provided a state-of-the-art ST4000+ "autopilot" and GPS navigation system that will maintain a compass course heading, or follow a GPS track under her control. Hilary’s Power Assist System provides access to the sophisticated ST4000+ pilot through sip and puff commands. A "puff on the MODE straw is like clicking a mouse on your computer, toggling the function of the system, so Hilary can reprogram the destination of the Raymarine navigation computer.

About the Power Assist System

Hilary Lister’s Power Assist System was developed by Steve Alvey of Calgary Canada. Alvey is a lifelong sailor, innovator, engineer and businessman. In 1994, the untimely accidents of two childhood "sailing buddies" inspired Alvey to get them back on the water and in control of their own boats. Over the past 12 years, Alvey has contributed tirelessly to making the sport of sailing accessible to sailors with severe disabilities. Alvey has formed and organized public accessible sailing programs across Canada and the USA (www.ablesailnetwork.ca ), developed and marketed accessible sailboats and innovative assistive technologies (www.martin16.com), and is a promoter and organizer of Mobility Cup - Canada’s International Regatta for Disabled Sailors (www.mobilitycup.org ). Alvey’s Power Assist Systems and seating systems make sailing accessible to thousands of men, women and children around the globe, from novice to Paralympic sailors. Alvey is a technical delegate of the International Foundation for Disabled Sailing (IFDS), where he developed a new competitive sailing format accessible to severely disabled sailors, now an event in the 2008 Paralympic Games.

Speed Sail

Crew.org.nz is running a new event.

The idea is timed runs over a measured quarter mile. Every boat gets to run the course twice, highest speed is counted. The details are still in a state of flux but here's the thinking so far.

RAYC will run the event for us.

The finish line is off the wharf for spectators to get a good look.

It will be a tight finish line.

The start line will be very long.

That way competitors can get up to 60 degrees of different apparent wind angle depending on where they choose to start on the line.

Go for maximum speed.

Entry open to anything driven by sails.

no limits on sails or rig

We have the weekend before the Coastal available, we will choose whichever day promises more wind, prize giving party that night at RAYC. We will only postpone if the committee boat is blown off it's anchor, maybe not even then.

Skipper has to be at least 18yo. (We are giving away rum).

We are limited to 120 entries.

We are struggling with classes and divisions at the moment. Current thinking is any class that can scrape up three boats is a class. Class legal only applies to deck level, ie no limits on sails or rig.

Outside of that we need an open division for boats that aren't a class, it has been suggested that we simply leave this to the competitors. That means you need to get three boats together and enter and you are in, you nominate your class (up to 30ft mono;up to 40 ft multi, windsurfers , kiteboards, ...) If others want into your class they need to meet the specs laid down by the first three.

There's more but let's hear some feedback.

Oh yeah entry will be online at Crew.org.nz ($25 per entry???)

Yachtyakka Supporter Profile

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Thanks to companies like Mothership both Yachtyakka and Crew.org can continue to bring you the latest and greatest yachting news from around the world and around the corner. Become a supporter of New Zealand’s Leading online yachting websites, register on the forums and join in the humour of Small Talk, the banter of Race Talk, the help of Cruise Talk, Dinghy Talk & Short Talk, see what Wellington are up to on Welly Talk, Post an ad on Crew Talk, and keep up with Multihulls on Open 8.5 Multis, enter the completion’s to win some Mount Gay.

Yachtyakka

Sailor Profile

I didn't come from a sailing family. But an early experience got me hooked, and by eight I was racing up and down the Hatea River in Whangarei in a P Class.

One thing led to another and more than 40 years and 150,000 miles of racing cruising and delivering later I'm back in NZ.

The transition from full time live aboard cruiser to a house and a job is much harder than the oft written about transition in the opposite direction. Soon after our returning to NZ I discovered Crew.org.nz and I was able to ease the pain by reading and talking sailing, even if I wasn't doing it.

Crew.org.nz also introduced me to new friends and new opportunities to sail.

If my wife complained about the time I spent on the site I simply told her it was cheaper than therapy.

After a few years of repairing the family finances and getting the kids through a "real" school, and worse, a real job for me, I saw Zoe's notice that she wanted to sell the site and move on. It was definitely an easy decision for me and the deal was transacted in very short time.

And here I am, The Fat Controller. Many Thanks to all those who have contributed to Crew.org.nz over its’ first three years, and to new arrivals, welcome.

Yachtyakka

Americas Cup Updates

News

27.06.2008 (11:30 CET) - Valencia (ES) - Alinghi

Alinghi starts two-boat training with ORMA60 multi-hulls in Lorient

Alinghi, Defender of the 33rd America’s Cup, begins the next phase of training towards a possible multi-hull Deed of Gift Match in 2009 and steps up a gear to two-boat training with the ORMA60s Foncia and Banque Populaire IV in Lorient, France, from 30 June until 5 July.

The Swiss team intends to continue its big boat and multi-hull development through this platform: “We now need to hone our boat handling skills, manoeuvres and mark approaches by matching up to another boat,” says Alinghi team skipper and tactician Brad Butterworth. “Having crew on both ORMA60s will increase our learning curve exponentially and marks the beginning of our two-boat training programme towards a multi-hull America’s Cup.”

The sailing team has been multi-hull training for several months racing the eXtreme40s and the Décision35s respectively in the iShares Cup and in the Lake Geneva based Julius Baer Challenge and it now looks forward to training alongside such an accomplished sailing team.

“We are very pleased to have such high calibre boats to train with; both Foncia and Banque Populaire IV are accomplished race boats and we look forward to a summer of two-boat training and to gaining as much crewing and big boat experience as possible before getting on to our multi-hull sometime at the end of the year. We are looking forward to working with the Banque Populaire team and hope the training will be mutually beneficial to both sailing teams,” adds Butterworth.

Alinghi was in Lorient in March sailing Foncia with skipper Alain Gautier and will return again in July and throughout the summer to match up against Banque Populaire IV, skippered by Pascal Bidégorry.