sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Hydrofoiling remote controlled sailing trimaran on test + Video
Hydrofoiling remote controlled sailing trimaran on test + Video


There was a good breeze at Austin Lakes, Mandurah, for test-sailing a Mini40 RC trimaran, using all four rigs, although too windy for the number one rig.

Designer Ian Holt describes the remote controlled foiler's performance:

The boat foiled upwind a few times but, will make changes to the foils before I sail the boat again. When on starboard tack and foiling, the boat sometimes veers hard to port. Right now, the port foil is perfect for lighter air foiling, whilst the starboard foil works well in a breeze, but only on a reach, not on a broad reach. Clearly, there is a fine line between good and bad settings for the foils!

Whilst the mainstream of radio control yachting centres around the One Metre Class, with the RG65 gaining popularity, and 10raters, the Marbleheads and the A Class offering alternatives for faster sailing with more freedom of design, there is another less well known option – the Mini40. The class is based on the Formula 40 class established in Europe back in the 1980s, the basic parameter here being that the boat had to fit inside a 40ft container to assist with transporting between events around Europe. For the radio controlled version, a 1/10th scale was adopted, resulting in maximum dimensions of 122cm x 122cm and a maximum sail area of 0.9sq metres. This means the number one rig is slightly smaller than a 10rater top suit, so sails can be made from old 10rater rigs if needed. Interestingly the Mini40 class rules state that you can have an unmeasured jib for use in speed trials – now there’s encouragement if ever it was needed to design a fast boat!

There is a mixture of cats and tris in the class. The cats are naturally lighter and so accelerate better, but you still have to work out how to support the mast and rudder – and the common solution is two rudders which add complexity to the steering control. One of the advantages of the main hull for a trimaran is that it helps tacking in light airs. More importantly, it permits the use of a single rudder which leads on to a few basic requirements for the boats. First of all, you need to stop them pitchpoling downwind. The only way to do this is to fit a 'T: foil on the bottom of the rudder, which works very much in the same way as a rear spoiler on the back of a racing car, holding the back end down. With the single rudder on a trimaran, this works well, you just need a rudder that is deep enough to keep the T foil immerse when the boat is flying the main hull, and a length of around 30cm appears to be a good compromise. The size of the T foil is found by trial and capsize. Too large and it slows the boat down but your five year old son can sail the boat safely. Too small and it pitchpoles too easily!

The old Formula 40 “Full Pelt” - Airborne – an update on Mini40 developments by Ian Holt -  Ian Holt  

Then comes the interesting part – the foils. Some designs do not use foils, but just a single centreboard under the main hull. A cut-down One Metre fin can work well (obviously throwing out that antiquated lump of lead first). If the floats are designed with sufficient buoyancy to not bury their bows when flying two hulls, then this can be a good all-round set-up for racing round a course. Far more fun though to try hydrofoiling . . . . Here we are still in the infancy of experimentation.

Mike Dann in the UK got his Ghost Train trimaranhydrofoiling in the mid 2000s and if you search You Tube you can find some very successful experiments in France and Spain in particular in the same era, some with very small floats, but with an overall beam in excess of the length. The trick is to find a happy compromise of getting the foils far enough forward form the rudder so that there is directional stability, yet keep the balance of the centre of effort of the foils below the centre of effort of the rig so that you can still tack. If the foils are too far forward, you can not get the boat to bear away, complete a tack. I have found the solution here is to ignore a common belief that the rig on a multihull needs to be further aft than on a similar sized monohull, and instead put the foils approx. 70% away along the hull from the stern, and then place the rig above this. I also have more sail area in the jib than is popular elsewhere in the class and this appears to be working.

Once you get foiling, then the hull shape is irrelevant, we are into foil development, and that is the problem. We need more people trying out ideas! I am using cheap helicopter blades bought over the internet as the basis for my foils, but it would be great to have more people getting interested in the class and helping push forward the development of the class.

Dave Creed is avidly searching supermarket shelves for large plastic drink bottles that we can use as hulls and create cheap platforms for the rig and foils. Others use old Marblehead hulls as the main hulls.

People have asked why we don’t use a similar foil design to that used by Oracle and the Kiwis in the America’s Cup. The answer is that the America’s Cup cat weigh proportionately much more than our Mini40s, and their foils were actively adjusted whilst sailing. The 'V' concept, where the foils are at 45 degrees to the vertical, are a happy compromise for us.

As the boat goes faster, so the additional lift form the foils causes the boat to rise out of the water, reducing the area of foil in the water, reducing the amount of lift, so the boat goes down again, and the cycle repeats
However, comparing ourselves to the aircraft industry, we are not much further on that the Wright Brothers! Undoubtedly the step-change that needs to come is for the windward foil to produce negative lift, thus holding down the boat and creating more power. We all recognise this, but it’s not easy to adapt to our size of boat. Some clever guys are using the adjustable foils system perfected by the Moth class, with wands automatically adjusting a T foil on each float foil, but this is beyond my carbon and West Epoxy construction skills. Another option would be for servos to be attached to each foil, with a '+ve' and a '-ve' setting. If there is anyone out there who likes a construction challenge, I can tell them what we need!

Daryn Burke’s Firedragon Mini40 from www.rcsails.comfoiling in the estuary at Mandurah - Airborne – an update on Mini40 developments by Ian Holt -  Ian Holt  

The boats are tremendous fun. You only need three or four of these to make any lake appear small.













by Ian Holt

  

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

http://www.sail-world.com/index.cfm?nid=119024

4:38 PM Tue 4 Feb 2014GMT


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







News - USA and the World

The Thurlow Fisher Lawyers team of Michael Coxon, Trent Barnabas and Dave O’Connor won one of the most amazing NSW 18ft Skiff Championships in the 120-year history of the sport following a brilliant finish in today’s last race of the series on Sydney Harbour. Story includes full video of the race. ... [more]  

In a disturbing report published by Associated Press, a newly appointed Environmental Secretary has said Brazil will not be able to achieve its stated goals of water quality in the venue for the 2016 Sailing Olympics. 'Removing 80 percent of the pollutants? It's not going to happen, it's not going to happen,' said Andrea Correa, who took office earlier this month. ... [more]  

Arranging to fly his family home to Queensland, Australia, was not how Alf Meads was supposed to spend his Thursday. He was supposed to be in the Bahamas with his wife Kelly and adult sons Cody and Zach, to give their 53-foot catamaran sailboat to Alf’s mother-in-law. The boat was going to be her retirement home. ... [more]  

Hugely disappointing news for the sport of disabled sailing worldwide, for Sailing team athletes who are already working hard towards Tokyo, and is a loss to the Paralympic Games itself as sailing provides a unique element to the sporting programme. ... [more]  

The remaining six medals for the Olympic events were decided on Day 6 of the ISAF Sailing World Cup Miami, during the Medal racing phase of the regatta, which counts for double points. Despite that points premium, four of the events, 49erFX, Finn, Nacra 17 and RS:X Women were decided yesterday, Day 5. ... [more]  

ISAF Sailing World Cup Miami: Medal Races photos provided by Ocean Images. ... [more]  

At the VX One Midwinter Championship, hosted by Sarasota Sailing Squadron in Florida, a handful of teams juggled among the top three finishing positions today, as four races were completed. Marty Kullman’s Blue Flame secured three firsts, however it is Christopher Alexander’s Isabelita Con Queso on top of the leaderboard heading into the final day of racing on Sunday with 19 points. ... [more]  

At the VX One Midwinter Championship, hosted by Sarasota Sailing Squadron in Florida, a handful of teams juggled among the top three finishing positions today, as four races were completed. Marty Kullman’s Blue Flame secured three firsts, however it is Christopher Alexander’s Isabelita Con Queso on top of the leaderboard heading into the final day of racing on Sunday with 19 points. ... [more]  

2015 ISAF Sailing World Cup Miami - Giles Scott (GBR) has convincingly and unflinchingly shown that he is still the man to beat in the Finn Class as the 2015 season gets underway. Finishing a close second in the medal race at the end of the Sailing World Cup Miami, Scott wrapped up his eighth consecutive major win in the class and defends the title he won this time last year. ... [more]  

Barcelona World Race - Unseasonal sunshine by Barcelona World Race Media
In the Barcelona World Race Cheminées Poujoulat has passed the Kerguelen Islands as Bernard Stamm and Jean Le Cam continue to lead the Southern Ocean charge. The duo were just over 300 miles north of the largest island of Kerguelen at 1400hrs this afternoon. ... [more]  

The International Paralympic Committee (IPC) has announced that the Tokyo 2020 Paralympic Games will feature 22 sports, with badminton and taekwondo included for the first time but the shock news is that sailing will not be a 2020 Paralympic sport. ... [more]  

The Gold medals have been decided in four events on Day 5 of the ISAF World Sailing Cup Miami. Finn sailor Giles Scott (GBR), is not the only one guaranteed to finish in a gold medal position tomorrow. Nacra 17 team Vittorio Bissaro and Silvia Sicouri (ITA), Women’s RS:X dominator Bryony Shaw (GBR) and the breakaway 49erFX Kiwis, Alex Maloney and Molly Meech (NZL) join him with gold in the bag. ... [more]  

VX One Midwinter Championship Day 1 by Christopher E. Howell
In the VX One Midwinter Championship, hosted by Sarasota Sailing Squadron, three races were completed today for 28 teams competing in Florida. ... [more]  

Day five of ISAF Sailing World Cup Miami, Presented by Sunbrella, saw the stage set for the Saturday’s medal races in the Olympic classes, while on the Paralympic side US Sailing Team Sperry athletes Rick Doerr (Clifton, N.J), Brad Kendell (Tampa, Fla.) and Hugh Freund (South Freeport, Maine) secured a silver medal in the three-person Sonar. ... [more]  

2014 - 2015 Barcelona World Race - After a month of racing, the Barcelona World Race fleet is through into the Southern Ocean. As is often the case, the distances between the boats have widened as they’ve entered the Roaring Forties. The leading crews, who were first to hit the strong winds of the southern latitudes, had a great opportunity to make good their escape. ... [more]  

2015 ISAF Sailing World Cup Miami - Giles Scott (GBR) has assured himself his first victory of the year after two more races were sailed Friday in the lightest winds of the week at the Sailing World Cup Miami. He now sits 23 points ahead of Ivan Kljakovic Gaspic (CRO), who had the best day to rise from fourth to second. Ioannis Mitakis (GRE) is third, just one point further back. ... [more]  

Barcelona World Race - The gaps widen by Barcelona World Race
Barcelona World Race - Another landmark will be ticked off tomorrow for Barcelona World Race leaders Cheminées Poujoulat when they sail north of the lonely Kerguelen Islands. ... [more]  

2015 ISAF Sailing World Cup Miami - Day 5 photos provided by Ocean Images. ... [more]  

GC32 Racing Tour - The future of sailing is, quite literally, flying. The catamarans that soared above the waves in the 2013 America’s Cup in San Francsco have taken the sailing world by storm. The boats have revolutionised sailing technology and competition, giving rise to the creation of new classes. ... [more]  

The Royal Ocean Racing Club is pleased to announce its partnership with Gill North America as official crew merchandise provider for the seventh edition of the RORC Caribbean 600, starting in Antigua on Monday 23 February. ... [more]  

American Windsurfing Tour - The Goya Pro Cabo Verde is shaping up to be the latest AWT edition of the ‘Clash of the Titans.’ The mega stars of windsurfing are currently tuning up their gear, and making final adjustments before the long journey to the remote island of Sal, Cabo Verde. ... [more]  

The second Annual Antigua Dragon Yacht Club Challenge will be hosted by Harmony Hall Yacht Club, with the support of the Antigua Yacht Club Marina and the Inn at English Harbour, with nine races scheduled to take place over five days in fantastic Caribbean conditions on identical Petticrow Dragons. ... [more]  

Roger Hickman skipper of Rolex Sydney Hobart Yacht Race IRC winner Wild Rose sat down with Geoff Waller of www.boatson.tv and described just what went into his boat winning the 2014 Rolex Sydney Hobart Yacht Race. His was a 'full-on' race (with dramatic 'on-board' video) which included a knock-down, broken steering, a wild 'Chinese gybe', storms and only a small amount of blood spilt. ... [more]  

The world’s elite sailors are preparing to meet in Singapore for the opening Act of the 2015 Extreme Sailing Series™, which is set to bring the world famous Marina Bay alive with its pioneering Stadium Racing concept. With the transfer window now closed, some new players will enter the arena as the Series launches into its ninth season, with continued support of Series Main Partner Land Rover. ... [more]  

2015 ISAF Sailing World Cup Miami - Day 4 photos provided by Ocean Images. ... [more]  

2014 - 2015 Barcelona World Race - No scape south because of South Indian Ocean Antarctic Exclusion Zone means a painful wait for Anna Corbella and Gérard Marin on GAES Centros Auditivos. ... [more]  

The expansion of sailing into so-called developing countries, continues at the ISAF Sailing World Cup, Miami, with newly embraced Cuba joining the 64 nation line-up encompassing 600 boats. The 2015 fleet on Biscayne Bay is a record turnout, for this second event on the 2015 Sailing World Cup Circuit ... [more]  

Day 4 of ISAF Sailing World Cup Miami 2015, Presented by Sunbrella, saw the US Sailing Team Sperry make steady gains in the Laser and Laser Radial classes as gold fleet racing approaches its conclusion. In the Sonar, Rick Doerr (Clifton, N.J), Brad Kendell (Tampa, Fla.) and Hugh Freund (South Freeport, Maine) will go for gold tomorrow in the final day of Paralympic racing. ... [more]  

At exactly 00:01 on the 29th January 2015, TeamVestas?' VO65 left VTE - Voltri Terminal Europa en route to Persico Marine in the foothills of the Italian Alps. The boat is now safely secured in a purpose-built facility near Bergamo, awaiting full assessment and the beginning of the repair process. ... [more]  

ISAF Sailing World Cup Miami Day 3 - There's a world of difference between skiing a long, smooth run and skiing on moguls. Today, forget the waves, it was the breeze on Biscayne Bay that was 'moguls.' Shift upon shift upon shift upon shift. ... [more]  

Ioannis Mitakis (GRE), the 2012 Finn European Champion, ruled the roost in Miami today with two emphatic race wins and moves up to third overall. Giles Scott (GBR) sailed his worst day so far, but still leads with a five point gap on Jake Lilley, and 12 points over Mitakis as the event reaches its half way stage. ... [more]  

The International DN Ice Yacht World and North American Championships are being held in Kingston, Ontario (right in front of our office). For the Kingston Yacht Club, we skated out to the middle of the lake, and put together a little highlight piece for them to remember the event by. ... [more]  

Doyle Sails had more success last weekend in the Auckland Optimist Championships, taking first and second overall in the 110 strong Open fleet. Six countries were represented in the event, and young sailors came the length of New Zealand to compete in the regatta that is a ranking event for World and International team selection. ... [more]  

EFG's Star Winter Series rules in Biscayne Bay
2015 ISAF Sailing World Cup Miami: Day 3 images by Ocean Images
ISAF Sailing World Cup Miami: Day 3 - US Sailing have eight in Top 10
ISAF World Sailing Cup Miami: Day 3 - Three back to back winners
Dates announced for Mount Gay Round Barbados Race Series 2016
America's Cup: Ben Ainslie Racing is first to Team to fly in Bermuda
North U 2015 U.S. Youth Match Racing Clinics Underway
Quantum Key West 2015 - Images by Tim Wilkes
ISAF Sailing World Cup Miami - Perfect conditions on Day 2 + Video
ISAF Sailing World Cup Miami - US Sailing team on Day 2
Announcing the second Annual Antigua Dragon Yacht Club Challenge
Volvo Ocean Race: Dongfeng - History, Joy and Tears
18ft Skiffs NSW Championship: Images from Race 4
Barcelona World Race: Conrad and Nandor’s 'No Good Very Bad Day!'
2015 ISAF Sailing World Cup Miami- Photos by Ocean Images
2015 ISAF Sailing World Cup Miami images by Ingrid Abery
ISAF Sailing World Cup Miami - Aussie Finn sailors charge on day 2
Pineapple Cup – Montego Bay Race - In for a blast
2015 VX One Midwinters action is heating up
America's Cup: Oracle crew mate lodges ISAF complaint against Tienpont
Volvo Ocean Race: A warm and colorful welcome for Team SCA into Sanya   
Touch2Play at Key West Race Week   
Barcelona World Race leaders split paths   
Tokyo 2020 Paralympic Games - Final line-up to be announced   
ISAF Sailing World Cup Miami Day 1 - Brits off to a flying start   
ISAF Sailing World Cup Miami - Tough Day 1 + Video   
ISAF Sailing World Cup Miami - Tough Day 1 + Video   
RC44 World Championship Leg 1 - RC44 Valletta Cup preview   
ISAF Sailing World Cup Miami - US Sailing Team Day 1   
ISAF Sailing World Cup Miami -Finn class -testing conditions on Day 1   
ISAF Olympic classes regatta Miami 2015 images by Ingrid Abery   
Volvo Ocean Race: Team Alvimedica wins first podium place in Sanya   
Volvo Ocean Race: Dongfeng scores historic victory for China   
Volvo Ocean Race: Dongfeng release first DroneCam video from Leg 3   
Volvo Ocean Race: Chinese team set historic first with home port win   
Volvo Ocean Race: Team Vestas Wind arrives on time in Genoa + Video   
America's Cup - Virgin considers backing Ben Ainslie, BAR   
Bell's Beer Bayview Mackinac Race - Changes   
Alpari World Match Racing Tour - Monsoon Cup preview   
Barcelona World Race - A game of chase   


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