Tampilkan postingan dengan label capsize. Tampilkan semua postingan
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Small Boat Plans And Kits | Didi 29 Retro Progress

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Small Boat Plans And Kits


Bruce Mierke is building a Didi 29 Retro in Murphy, North Carolina. Bruce is a professional boatbuilder, building her for himself and progressing nicely. He has now completed the hull and it will be turned over in a few weeks.

This design is based on the Didi 26, modified to create a more classic image. Carrying a choice of rigs, the squaretop Marconi rig below and two gaff rigs further down the page. It is a radius chine plywood design, round bilge from plywood and can be built from plans or a CNC kit. Although Bruce is a professional builder, I developed this construction method primarily for amateurs and they have built many boats to this range of designs.
Marconi rig of Didi 29 Retro
Here are the latest photos from Bruce, showing the beautiful standard of finish that he has achieved.
Beautiful hull finish.
Two gaff rigs, racing at left and cruising at right.

For more info on this and our other designs, visit http://dixdesign.com/

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Pontoon Boat Plans Aluminum | Yachting Monthly Capsize Video

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Pontoon Boat Plans Aluminum


Yachting Monthly have a very interesting  video of a capsize test on their YouTube Channel. I only became aware of it yesterday when it was highlighted by Scuttlebutt Sailing News.

Many have read the accounts that I have written about our capsize experience on the Didi 38 "Black Cat" in the Cape To Rio Race 2014. It is not possible to visualise what it is like to be there in that situation, even if you sit inside your boat and try to imagine it turning around you but this video goes a long way to help visualise it. It is not fully realistic because the roof stays at the top as the boat rotates, so the world is rotating around the boat rather than the boat rotating within the world around it. To provide better visualisation the camera needs to stay upright while the boat goes upside-down.

Bear in mind that this test is in flat water and the boat is rotated quite slowly from upright to upside-down, then rights itself quickly. Normally a capsize will happen in seas that are large and confused, so it is a much more violent process than seen in the video, with the boat being thrown in confused directions while it capsizes. Despite that, it is worth watching, to see the way that crew, equipment, etc was moved around the cabin and to see just how much water came in even in that still water.

It is not an experience that I would recommend to anyone, yet it is an experience that I am glad to have had and to have survived.

It also validates the toughness of the methods of construction that I have used for these plywood designs, that "Black Cat" came through with minimal damage.

To see our range of designs to carry you across the dam or around the world, please visit http://dixdesign.com/

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Pontoon Boat Plans | Trans Ocean Pedalboat

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Pontoon Boat Plans


Davey du Plessis is an author, inspirational speaker and an adventurer who pushes himself far beyond the limits of us more normal people. He has ridden around the perimeter of Africa on a bicycle. He was doing a source to sea solo navigation of the Amazon River when he was ambushed and shot, then had to get himself back to civilisation. He was tested close to his limits in that adventure and still has the bullet lodged in his heart.

Daveys planned next adventure is to pedal a boat around the world. He approached me to design the boat and had his uncle, Tertius du Plessis, build it for him. The boat is now mostly complete and will soon be ready for testing.
Looks like a hi-tec starfighter but really a low-tec pedal boat.
While I designed the boat, I didnt design the propulsion system, which consists of a leg that has a conventional pedal arrangement at the top, inside the boat, and a plastic 2-blade propeller under the hull. The slow-rotating propeller has soft blades to reduce the chances of damaging marine life.
Exterior view, looking like it came from a Star Wars movie.

The styling looks very sleek and possibly intended for high speeds but high speed is not the aim. It is designed for low drag both in the water and above. A human-powered boat needs to be easily driven, to maximise the distance that can be covered for each unit of energy that goes into propelling it. That means that it must offer little resistance to the water and the air. The underbody is shaped for low drag at low speeds and to be easily steered in downwind tradewind conditions. She has a shallow barn-door type rudder, transom-hung.
Builder Tertius du Plessis with the boat during construction.

Davey is sure to find very bad weather many times on his voyaging, so his boat is also shaped for low resistance to breaking waves that strike it and it is shaped to roll back upright when (rather than if) it is capsized. Stability comes from the tankage and stowage compartments placed low down in the hull to lower the centre of gravity. The deck and cabin are shaped to float the boat high if inverted with the hatches and ports closed, to make it unstable upside-down. Davey will also be able to use his own weight inside the boat to help it roll back to upright if needed.

Construction is stitch-&-glue plywood, assembled over permanent bulkheads and partial bulkheads. The interior is divided into three compartments, separated by full bulkheads with companion hatches. Both ends are berth length, to accommodate one or two crew for a voyage.
Interior view of the cockpit. Full bulkheads separate bow and stern.

This coming weekend sees the Cape Town International Boat Show and Daveys boat will be on display.

This boat is not yet on our website but you can see our other designs at http://dixdesign.com/ and http://dixdesign.com/mobile.

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Boat Plans Canada | South Atlantic Capsize

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Boat Plans Canada


Most of you will have read here or elsewhere about our adventure in the 2014 Cape to Rio Race on the Didi 38 "Black Cat". I have published a book about it, which can now be ordered from our website. For those who dont know what happened, here is a synopsis of the book, which is titled "South Atlantic Capsize - Lessons Taught by a Big Ocean Wave".

At dusk on 5th January 2014, the Didi 38 "Black Cat" was struck by a massive wave on the second day of the 2014 Cape to Rio Race across the South Atlantic Ocean. The wave capsized her in an instant, flinging crew, equipment and food around the interior and destroying most of the electronics with water that entered through the companion hatch. "Black Cat" recovered very quickly but the electrical damage was done. This is the story about the race, the boat, the crew and what happened on that day.
Front cover of the new book
It also explains the principles of stability that control the safety of monohull sailboats, mostly those characteristics that affect the behaviour of boats in large beam seas that might capsize them and the features needed to quickly return them to upright. It does this in words and terms that can be easily understood by non-technical people.
Back cover.
You will also read the story of the capsize of the 64ft "Sayula II" in the Southern Ocean when sailing between Cape Town and Sydney in the 1973 Whitbread Round the World Race, written by yacht designer Butch Dalrymple-Smith, who was one of the crew. Also what one boat owner has added to his own boat to prepare it and himself in case they are caught by conditions that place them at risk of capsize.

I managed to coerce two of the crew to also put pen to paper, to each write a short piece about his experience. I felt this to be important because we all observe events from our particular points of observation and positions in life. My view from the inverted cabin roof of Sean Collins hanging on for his life in the cockpit and of Adrian Pearson flying like a rag doll around the cabin is very different from that of Sean looking down the steep slope of a monster wave and seeing the masthead spearing into the ocean below, knowing that the boat will follow deck-first.  I would have liked to have had stories from the other two crew as well but they did not feel capable of effectively putting their stories into words.

You can buy the book at http://dixdesign.com/articles.htm. We can ship to you wherever you are, at our normal shipping rates.

To view our range of boat designs, please visit http://dixdesign.com/


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Boat Plans Pdf | Review of South Atlantic Capsize Book

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Boat Plans Pdf


The first review of my book "South Atlantic Capsize - Lessons Taught by a Big Ocean Wave", has appeared. This review was written by Richard Crockett, editor of Sailing for Southern Africa magazine. I will leave the review to speak for itself.

Front cover of the book.
More Really Good Books
 
One of the perks of my job is that I do get to read some really good books. Two I have recently read got into that ‘must read’ category.


The first is entitled ‘South Atlantic Capsize’ – Lessons Taught by a Big Ocean Wave.
 
It is written by Dudley Dix and tells the story of ‘Black Cat’, the crew, the 2014 Cape to Rio Race and the storm that struck the fleet in the opening days of that race. It’s a personal account of what happened on the boat when it was capsized, what damage was done, what the men onboard did to safeguard vessel and crew, what they did to get themselves back to port – as well as what else was going on around them.


It’s rivetting reading as it is not just well written, but written by a man with a serious understanding of the sea, yacht design, yacht construction – and ultimately what happened to them out there.

I like the fact that it gives some history of the Cape to Rio Race, a pretty detailed account of the boat’s design and construction and his careful selection of crew. To many crew selection is simply a case of asking mates, but for Dix it’s far more than that.

So, for anyone contemplating competing in the 2017 Cape to Rio race, this book should be read, not for the scarey stuff, but for the practical preparation tips, and advice on handling bad weather. For those simply making passages at sea, there is lots to learn too.

Thank you Richard Crockett for the review.

To buy the book or to view our boat designs, go to http://dixdesign.com/.

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Boat Plans Wooden | Inlet Runner at the Wooden Boat Show

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Boat Plans Wooden


This time last week we were in Connecticut,  participating in the 24th annual Wooden Boat Show at Mystic Seaport. We drove there with two boats in tow, the Paper Jet prototype that we have exhibited the past few years, and the prototype of our new Inlet Runner 16 garvey powerboat design. Sorry, no hyperlink for that one yet, I am still working on the design package.
Paper Jet and Inlet Runner 16 nested for long-distance travels.
The Inlet Runner was built by Kevin Agee and exhibited by him in the "I Built it Myself" section of the show. As a first-time amateur boatbuilder with little woodworking experience, he made such a great job of his project that he took 2nd place in the amateur-built powerboat division, winning the Honourable Mention Award. Congratulations to Kevin for a job well done. I helped out at the end of the project with a bit of sanding but Kevin did everything else himself.
Inlet Runner in the "I Built it Myself" section of the Wooden Boat Show.
The Inlet Runner has my interpretation of a classic garvey hull.
 The Inlet Runner received a lot of interest and we have a few builders waiting for completion of the plans. Also a few requests for both bigger and smaller versions of the same concept. Watch for those on this blog in the next year or two but they must wait in line behind other projects that are currently in progress.

This boat has side seats aft and foredeck with lockers under for stowage, icebox, bait well etc. It also has a self-draining wet deck that can be left clear for fishing space or fitted with a swivel seat for flat-water fishing. We will also offer a Jonboat format with transverse seats and a centre console format on the wet deck.
Deck layout of Inlet Runner, set up for flat water fishing.
Overall, a successful show for us. Thank you Wooden Boat Publications, for organising this show for the benefit of lovers of wooden boats of all types. I look forward to being there again in 2016.

To see our full range of designs, please visit http://dixdesign.com or, for the mobile viewers, http://dixdesign.com/mobile

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Boat Plans Wooden | Some Thoughts on Capsize in the Atlantic

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Boat Plans Wooden


I am back home in Virginia Beach and working my way through the mountain of email, progressing toward normalising my work again. I have swapped the Southern Hemisphere for the Northern one, summer for winter and cruising the Brazilian Bay of Islands for a blizzard that is coming later today. What else is there to do than to dig right into the pile of work that awaited me?

A relaxed holiday on the sunny beaches, mountains and waters of Cape Town gave me time to absorb and reflect on the whole experience of turning a big boat upside down on the ocean.

Many people have said to me that it must have been a frightening experience but I didnt find it frightening at all. I remember thinking "Oh, we are upside down, was that a wave or have we lost the keel?". My next thoughts were about the safety of Sean, who was alone in the cockpit. I saw through the companionway that he was hanging on tight then my eyes and mind went back to what was happening inside the boat.

Sean says that he wasnt frightened either. The wave broke over the top of him and he was entranced by the mast spearing the water as "Black Cat" rolled over. He wondered if the mast would still be standing after she righted herself. He says "Rather a surreal experience more than frightening. BC ("Black Cat") felt safe somehow."

In contrast, Gavin had what might be considered a more normal reaction to what had happened. He got a big fright and his reaction was to move into the cockpit and stay there, where he felt safer (in the event of another capsize) and from where he was able to pump water from the bilge with the pump that is mounted in the cockpit seat. Gavin is the youngest member of the crew but has almost as many seas miles in tough conditions as the rest of us and can cope with anything that is thrown at him at sea.

I think that the big difference between Gavins reaction and that of Sean and myself is possibly due to our different experiences in waves. Gavin is not a surfer but both Sean and I are. We have spent countless hours in breaking waves that are sometimes big and frightening. As with all things in our lives, our minds get sensitised by our experiences and it takes progressively more intense experiences to break through that sensitising and make an impression. That sensitizing helps us to keep a clear train of thought in intense situations. This situation involved being thrown around by a big wave and was less out of the ordinary for us surfers than for the non-surfers in the crew.

It was also a lot more frightening for those on land than for us on the boat. We knew exactly what our situation was but loved ones on land could only speculate. They were hearing very sketchy reports from multiple sources. They knew that we had hassles and they knew that there was a very violent storm hammering us. Their minds were having a field day imagining all sorts of things happening to us on the ocean in wild conditions. Whether or not our actual experiences surpassed their imagined ones I dont know.

A few people have asked if I would rather not have been there or if I would have preferred it to have happened to someone else. Truthfully, a definite no. I am glad to have been there and to have experienced this. I am pleased that it happened to me and not to someone else. If I could exchange what happened for anything else, it would be that we did not break the rudder and were able to continue our Cape to Rio Race as planned. But that was not to be. We did break the rudder, we did get blown back into a very violent storm, we did get turned upside down by a big breaking wave and we did all survive with minimal damage to the boat or injury to the crew.

The result is that I went through that roller-coaster washing machine and I did it with my eyes open and my analytical brain switched on. I was able to observe for myself what happens in this situation, what happens to the boat itself and to everything that is inside this kaleidoscope tube as it turns through 3D space, jumbling up crew, stores and equipment and leaving them all relocated in whatever positions gravity and rotational forces happened to have thrown them.

I consider myself, crew and boat to be fortunate to have come through as lightly as we did. I also consider myself very fortunate to now be one of what must be a very small number of boat designers who have this experience in their backgrounds, an experience that is foreverafter there to influence how and why we do what we do in every future boat that we design.

I was told a few months ago by an interior design specialist that she wanted to work with me to design interiors for my boats. She said that on boat shows and in magazines she had seen some really bad interiors and the fact that she was talking to me on this subject seemed to infer that she thought that my interiors could do with improvement. I asked what ocean sailing experience she had, which proved to be none at all. I told her that my interiors were designed to be safe for a gyrating boat on the ocean, not for boat shows or drinking cocktails on a marina. My interiors and all other aspects of my designs come from my experience at sea, gained over many thousands of miles of cruising and racing in conditions from delightful to horrendous. From now on they will also be influenced by my experience of being tossed out of control inside a capsizing boat.

To see our range of boat designs, please go to http://dixdesign.com/.




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