sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery

 

Sail-World.com : Sailrocket 2 on the way to an outright world speed sailing record?

Sailrocket 2 on the way to an outright world speed sailing record?

'SailRocket 2 sea trials Day 1'    Vestas Sailrocket - copyright

In 2008, Paul Larson and his Vestas Sailrocket was on the way to an outright speed sailing record when his craft crashed in a spectacular fashion, damaging it badly. It has been a long road back, but Vestas Sailrocket 2 has arrived in Namibia for their next challenge. The aim of the team is to beat the outright world sailing speed record.

The team currently holds the B-class (150-235 square feet of sail)speed sailing record with a speed over a 500m distance of 47.36 knots (87.71 km/h), but in 2008, before crashing, Sailrocket had reached a reported unofficial speed of 52.22 knots. (See the video the end of this article and relive the exultation with their speed achievement, watch the crash and then sympathise with Larson's devastation at his dream's destruction.)

Sailrocket 2 design -  .. .  
Sailrocket 2's construction:
The revised craft was launched March 8 at an empty weight of only 275 kg/605 lb. Fabricated with materials from SP-High Modulus, the main structure is an autoclave-cured sandwich construction, comprising carbon fiber/epoxy prepreg skins over an aramid honeycomb core.

Prepregs included Gurit’s Ampreg 22, SE84LV and SE70 and some dry reinforcements. Its wing-like sail is built around a CompoTech carbon tube that acts as a spar. The wingskins are a polyester heat shrink film. According to Larsen, the entire boat, including rigging, has the equivalent aerodynamic drag of a 74 cm/30-inch diameter sphere, and its revised design enables the pilot to maneuver the craft in much rougher water than the first version could handle.

Here's the latest from Paul Larsen on progress, and see the end of the story for videos of their current testing and the spectacular crash of 2008:


Yesterday evening we had our third session of tow testing of the bare platform. It was a beautiful evening as we towed the wing-less platform up and down speed spot with the whole team taking turns in the boat and in the RIB in order to observe all aspects first hand.

We saw on our second session the day before that the addition of the first trial 'step' on the front float made a big difference to it's ability to release from the water and step up into planing mode.

The new second step gets fitted - Vestas SailRocket 2 -  Vestas Sailrocket?nid=83126_- copyright  
The new second 'step' on the rear underside of the hull quickly ventilated from behind at speeds as low as three-four knots. This enabled the up forces on the front of the float to win the battle and start lifting the hull upwards as speed increased. This in turn allows the first original step to 'get access' to the air and also ventilate. Voila... the hull keeps lifting and we are planing.

We wanted to see this work first hand before we went and added them to all the three floats. The back float was hence still suffering and struggling to break free from the water. We tried a few other trials with foils up and down and the beam swung fore and aft before deciding to head back in.

Yesterday, we went back out with steps on all three hulls. The leeward hull is so lightly loaded without the wing on that the step really isn't necessary. I was hoping for a bigger change on the rear float. Whilst the step was an improvement, it seems that we still have a low speed where the aft float gets caught in the wave pattern generated from the front float. There is every chance that this might just be a phenomenon caused by tow testing and that the addition of the side force of the wing could break the whole 'loop' so we shouldn't get too concerned until we conduct some sailing trials.
Vestas SailRocket 2 -  Vestas Sailrocket?nid=83126_- copyright  


It was interesting yesterday to watch the foil behaviour. We were typically towing at speeds around 15-17 knots. The fact is that the foil was virtually doing nothing and you could hear it rattling around in its locking mechanism rather than being forced against either the upward or downward limiters. When the foil is fully submerged when the boat is stationary, there is as much lifting area as there is downward pulling area. The effect is that when it has an angle of attack created by any side force i.e. a sail or a tow-line, the overall force is neither up or down.

You have to remember that the foils on our boats are actually pulling the boat down into the water. On most hydrofoilers the foils are there to lift the boat up and out of the water. On the Sailrocket designs, the angled/inclined wing does all the lifting and it is the foil that keeps us down. So... when we start off and the full foil is submerged, there is no 'net' down force from the foil but the wing is pulling up. As we accelerate and the wing powers up, it gradually begins to lift the boat up with it. This means that the foil rises and the top section comes out of the water only leaving the angled lower part in the water and this is the bit that does all the 'down' work. When the boat is hauling along at full steam, the back of the boat will naturally ride at the height where the up and down forces balance. If it gets 'bumped' too high then the balance will try and pull it down and visa versa.

This means we can only do so much towing the boat around without the addition of the actual sailing loads.

Vestas SailRocket 2 -  Vestas Sailrocket?nid=83126_- copyright  
It sure was a beautiful evening. It was a perfect opportunity to let every other team member go for a ride. I really enjoyed seein Ben in the cockpit. It always surprised me to see boat builders spend so much time building boats only to see them go out the shed and the next set of plans come in. Surely the joy has to be in actually seeing what you have spent so long building in its element. This way you can truly appreciate what it is you are creating. It has to make the whole experience richer.

Helena was all concentration. She knows that she will have the option to pilot this machine for a record attempt at some stage... and she knows that that day may well be approaching. It's not talk anymore. What she does and how hard she pushes it is soley up to her. There will be no restrictions and if she wants to go for an outright attempt... then that will be her call. Yesterday she also got to drive it for the first time..
Ben gets to play in the hot seat - Vestas SailRocket 2 -  Vestas Sailrocket?nid=83126_- copyright  


The only one missing was Hiskia... but he'll probably get his turn today.

Vestas SailRocket 2 -  Vestas Sailrocket?nid=83126_- copyright  
The warm East wind was blowing lightly this morning which would indicate a nice but relatively windless day ahead. We will do one more session of tow testing where we will actually measure some of these loads... and then we will roll straight into the wing trials. We might be able to do both of these today if this wind settles a little so as not to corrupt the numbers.

I must admit that I am still a little concerned about the 'hump' drag. In respect to our situation, this 'hump' is the amount of drag that builds up before the boat makes the transition into 'planing' mode. You often see it in fast powerboats where they need to use a lot of power to get started but once they are up and planing on the surface of the water, they don't need so much power. This is because they have overcome this transition from low speed displacement mode to high speed planing mode. Some shapes do it better than others. We are discovering how big our 'hump' is right now and will try and use a few tricks to bend it to our will.

To follow the progress of Sailrocket 2, go to their website?nid=83126








The following video was taken during the 2008 record achievement and shows the spectacular crash:




by Paul Larsen

  

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

http://www.sail-world.com/index.cfm?nid=83126

12:11 AM Wed 4 May 2011 GMT






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


News - USA and the World

Sometime during last night’s moonless gloom in the Volvo Ocean Race, the masthead lights of Dongfeng and Mapfre appeared to the west, maybe right where they would have been if we had jibed with the fleet the previous day. To say that was a relief is an understatement-that we are back in touch, back in the fray near the front, it keeps everyone motivated and pushing a little bit harder. ... [more]  

More than forty five years since his historical circumnavigation, legendary Clipper Race founder Sir Robin Knox-Johnston, 75, continues to prove inspirational to adventurers around the globe. Sir Robin, the oldest entrant in the 3,542 mile Route du Rhum, finished third in his Rhum class into La Pointe À Pitre, Guadeloupe. ... [more]  

With Olympic heroes and World Champions in their numbers at the ISAF Sailing World Cup Final in Abu Dhabi, UAE, local children are being inspired to take up the sport. By utilising the star names on show at the ISAF Sailing World Cup Final, the Abu Dhabi Sailing and Yacht Club, hosts of the regatta, are using the event to promote the sport in the Emirati capital. ... [more]  

The last day of the Airwaves Noumea PWA Dream Cup saw a grandstand finale to the 2014 PWA World Tour as the morning showers finally cleared to allow the wind to fill in and the respective titles to be decided. With the racing beginning later than scheduled the title race came down to one final race, which would ultimately decide the title. ... [more]  

Olympic medal-winning skipper Ian Walker, from Abu Dhabi Ocean Racing (ADOR) – the emirate’s Volvo Ocean Race contesting squad – recently took time out of his hectic schedule while he was in Cape Town, as the team prepared for Leg 2 of the race to catch-up with students at The British School Al Khubairat via a video call. ... [more]  

Volvo Ocean Race 2014-15 – Corinna Halloran reports on day five of leg 2 for Team SCA. Team SCA has a super fan. She’s seven and, at home, she has posters of Team SCA on her wall. As a member of the team, and as a woman in 2014, this is extremely cool. ... [more]  

The Sailing Instructions for the 2014 ISAF Sailing World Cup Final that will be held in Abu Dhabi, United Arab Emirates from 26-30 November have been published. All ten Olympic events and an Open Kiteboarding event will be contested in the Emirati capital off of the stunning Corniche. ... [more]  

Italy's Giulia Conti and Francesca Clapcich have been one of the leading teams in the Women's Skiff, the 49erFX, and head to Abu Dhabi, United Arab Emirates ready for the ISAF Sailing World Cup Final. ... [more]  

St Barth Cata Cup day 3 by Dominique Ladouceur
Day three’s race was a lot more difficult than yesterday’s at the St-Barth Cata Cup due to b winds. After pushing back the morning race to 2p.m. due to 30 knots winds at the tip of Colombier, the race committee decided to stick to only one race in the afternoon. ... [more]  

Team Alivimedica skipper Charlie Enright and navigator Will Oxley sat with Andy Rice to assess Leg 2 before the start in Cape Town. Here is the second part of the Leg Two analysis. ... [more]  

Position report for the Volvo Ocean Race boats as of 24th November 0700 UTC. It's been a fairly quiet night out there - and the biggest change is that the boats are beginning to close up, and become more compact. ADOR, who gybed north first, around six hours before the rest of the fleet on Saturday night, have moved south a little, whereas the rest of the boats have remained in the same line. ... [more]  

The 10 competing teams at the RC44 Oman Cup enjoyed a great sailing day on the Gulf of Oman for the penultimate day of the 2014 Championship Tour. Terry Hutchinson continued to guide Vladimir Prosihkin’s Team Nika the right way around the course, extending their lead in the overall standings, adding another race win to their scoreline, Team Aqua stay second with Charisma hanging onto third. ... [more]  

Position report for the Volvo Ocean Race fleet as of 23 November, 1900 UTC. Four days into the Leg 2, and the fleet is finally making progress towards Abu Dhabi. The seven boats are now south of Madagascar, and they’ve been heading north since last night. ... [more]  

Position report for the Volvo Ocean Race boats as of 0748 UTC, November 23rd. So what happened overnight? Abu Dhabi Ocean Racing were the first to head north and then progressively the other boats in the fleet decided to follow their lead. The fleet is really close together. ... [more]  

Gladwell's Line: The America's Cup is now Bermuda's Cup? *Feature by Richard Gladwell/Sail-World.com/nz
The America's Cup roared into life on Friday with the publication of a story out of San Diego, saying that the Californian venue had missed getting the nod as the venue for the next America's Cup. And that being the case, then the British Overseas Territory of Bermuda seems to have got the nod. ... [more]  

VX ONE Winter Series 2014: It was a family affair at the top of the leaderboard for the opening weekend of the VX One Winter Series. Michael, Christina, Robert and Phillip Norris bested 21 other teams at Sarasota Sailing Squadron to take the advantage in the three-weekend series, which continues through March 2015. ... [more]  

With no team able to discard the last event of the season, the podium positions were by no means secure as last day of racing got underway at the RC44 Oman Cup, in a sedate seven-knot breeze. Going into the final day Vladimir Prosikhin’s Team Nika, with tactician Terry Hutchinson calling the shots, sat at the top of the leader board having shown an unmatched level of consistency in Muscat. ... [more]  

Usual skipper Seve Jarvin and for’ard hand Sam Newton were joined in the team by James Wierzbowski for today’s race and led from shortly after the to defeat defending champion Thurlow Fisher Lawyers (Michael Coxon, Dave O’Connor, Dave Ewings) by 38s. Coopers 62-Rag and Famish Hotel (Jack Macartney, Mark Kennedy, Peter Harris) was a further 21s back in third place. ... [more]  

Overall race leader, Abu Dhabi Ocean Racing (Ian Walker) has had an eventful few days since the start in Cape Town on Wednesday. Their goal is to be first home in their home port of Abu Dhabi - six other boats willing. ... [more]  

2014 Argo Group Gold Cup - Take time to remember. It was mid-October, one week before the brilliant Sunday Finals of the Argo Group Gold Cup and Bermuda was slammed by the second major storm in a week. Tropical Storm Fay - or was it Hurricane Fay by then— had hit Bermuda with a sneaky left jab only five days earlier. ... [more]  

2014 Turkey Day Regatta - The largest of Alamitos Bay Yacht Club's popular holiday sailing competitions the 67th Turkey Day Regatta has nearly 300 sailors on 216 boats in 21 classes, several of them world champions taking the weekend seriously. ... [more]  

The wind took a little longer to kick in on the penultimate day of the Airwaves Noumea Dream Cup PWA, but the sun soon burnt through the lingering cloud to allow the wind to build - producing another exhilarating afternoon of racing. ... [more]  

Brian Carlin, On Board Reporter for Team Vestas Wind reports on the delights of using the 'bathroom' while clocking along at 20kts plus in the Southern Ocean. ... [more]  

At the RC44 Oman Cup the 10 competing teams enjoyed a great sailing day on the Gulf of Oman for the penultimate day of the 2014 Championship Tour. Racing started in a seven-knot north-westerly breeze which built steadily throughout the day. ... [more]  

The world’s largest sailing media group, Sail-World.com, held its first continental group meeting at the Marine Equipment Trade Show (METS) this week. METS is the world’s largest B2B Marine show and this year it had a record 1358 exhibitors and more than 21,000 Marine industry representatives. ... [more]  

At the ISAF Sailing World Cup Final in Abu Dhabi, United Arab Emirates 2013 World Champion Florian Gruber is expecting the Open Formula Kiteboarding event to be the, 'strongest fleet this year.' ... [more]  

Volvo Ocean Race: Fleet heads into the Southern Ocean + Videos *Feature by Richard Gladwell, Sail-World.com/nz
At the latest report, Volvo Ocean Race Control, reported Dongfeng Race Team as being the leader in the second leg to Abu Dhabi. Winds were reported to be 18-25kts, with Team Vestas Wind and Team SCA recording the highest boatspeed of 20kts. ... [more]  

2014 ISAF Sailing World Cup Final - Abu Dhabi - The ISAF Sailing World Cup Final in Abu Dhabi, United Arab Emirates is set to be an 'experience of a lifetime' according to American Women's 470 sailor Briana Provancha. ... [more]  

America's Cup: Source named in Bermuda venue leak *Feature by Richard Gladwell, Sail-World.com/nz
San Diego sports journalist, Matt Calkins, has named one of the sources of comment that the 35th America's Cup will be held in the British Oversea Territory of Bermuda. Writing in the San Diego Union Tribune, Calkins claimed that San Diego Tourism Authority CEO, Joe Terzi, had told the U-T. ... [more]  

2014 RC44 Oman Cup - Consistency was hard to come by and no team managed to stay in the top half of the fleet in all three races. Chris Bake’s Team Aqua (GBR) was the most consistent team of the day picking up 11-points, Nika and Charisma both added 12-points to their overall score. ... [more]  

Team Vestas Wind’s Rob Salthouse perches perilously on the edge of his bunk, eyes fixed on a well-earned freeze-dried feast, steam snaking up towards his nostrils. ... [more]  

Ensuring a safe fuel supply for America’s 12 million registered boat owners may have to wait, said Boat Owners Association of The United States (BoatUS) after the Environmental Protection Agency (EPA) announced today that the agency will further delay the final rule on how much ethanol refiners must blend into the nation’s gasoline supply under the federal Renewable Fuel Standard (RFS). ... [more]  

Yates Cup: US supermaxi Rio100 wins first offshore race + Video *Feature by Richard Gladwell/Sail-World.com/nz
The supermaxi Bakewell-White design, Rio100 (Manouch Moshayedi, USA) has won her first race, sailing in the Yates Cup. She finished at 7.30am on Saturday morning, followed by the Botin 80 Beau Geste 14 minutes later with the Volvo 70 Giacomo 67minutes later. See video in this story. ... [more]  

Airwaves Noumea PWA Dream Cup - Men’s title race takes a twist
RC44 Oman Cup - Consistency hard to come by
Volvo Ocean Race - Discomfort takes over for Team Alvimedica
Volvo Ocean Race - Rapid change for Team SCA
Viper 640 event at Lake Garda - 22-26th June 2015
British Cycling grows by over 500%, can sailing do the same?
GC32 Racing Tour 2015 - Dates and venues
Class 40-footers to be featured in 2015 Annapolis-to-Newport Race
Spectacular performance by Bakewell-White maxi early in first race *Feature
Airwaves Noumea PWA Dream Cup - Big strides for Cousin and Moussilmani
America's Cup: Team New Zealand responds to Venue rumours *Feature
ORC reveals rule improvements for 2015
Volvo Ocean Race - Hammer down for Team Alvimedica
Volvo Ocean Race - Team SCA heads for unknown territory
ISAF Sailing World Cup Final set to be 'an experience of a lifetime'
RC44 Oman Cup - Team Nika gets a taste for the podium + Video
St Barth Cata Cup 2014 - Game on!
Rolex Sydney Hobart Yacht Race 2014 - Wild Oats XI reveals new livery
Rolex Sydney Hobart 2014 - Wild Oats XI and Audi ready: photos
Volvo Ocean Race: Meek's tips pay dividend in Leg 2 squalls and calms *Feature
Volvo Ocean Race - Abu Dhabi Ocean Racing in search of hometown glory   
Airwaves Noumea PWA Dream Cup - Waiting game continues on day 2   
Barcelona World Race skippers named as scientific agents   
Volvo Ocean Race: Stop-start battle to the Cape of Good Hope   
Volvo Ocean Race: Leg 2 starts at high speed in 35kt winds   
Volvo Ocean Race - Team SCA off to gutsy leg 2 start   
ISAF Sailing World Cup Final - Heroes and champions in Nacra 17 fleet   
ISAF Sailing World Cup Final - Talented Finn pack all set   
RC44 Oman Cup - Synergy crowned RC44 Match Race Champions   
Volvo Ocean Race: Leg 2 start - action replay video from Cape Town   
Volvo Ocean Race: Team Alvimedica on tour in Cape Town   
15th Ambassadors Cup - Brazil claims victory   
Route du Rhum - Alex Pella first ever Spanish skipper to finish first   
SSL Finals 2014 - Star World Champion Stanjek to race with Olesen   
ISAF Sailing World Cup Melbourne: Finn fight looming on Port Phillip   
Rugby man appointed Chief Executive Officer of Yachting Australia   
Welcome back: Congressional Cup Joins Alpari World Match Racing Tour   
18ft Skiffs: Smeg's second Red-Line run down Sydney harbour in 40kts *Feature   
Volvo Ocean Race: Start Wednesday - Cyclone season awaits Leg 2 fleet   
Airwaves Noumea PWA Dream Cup - Opening day in New Caledonia   


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.
XLXL NEW US
LocalAds   DE  ES  FR  IT