I've just logged into the blog for the first time in a little while to find a message from Rob Buchanan of
Greenport, Long Island, USA. He is the first to inform me that he and his family have built a version of my Island Bay Dory design. Hopefully he'll mail me some pictures soon, and with help from the comment he made on his build, I'll be building an Island Bay Dory with my son in the coming weeks.
Thursday, September 17, 2009
Thursday, July 2, 2009
Building on a small scale
While I get some other jobs out of the way (mainly restoring the Mini that is lurking in the background in all the garage shots of the kayak build) I am building on a smaller scale in the house during the dark winter evenings.
I'm trying out the Selway-Fisher Rhum plans at 1:10 scale before trying it for real. The reason for this is I want to change the internal layout, moving bulkheads and fitting permanent side seats, and I want to make sure it all fits. Even small boats are fairly complex 3D shapes an it helps to make sure the visualisation I have in my mind will actually work for real.
Last night I swapped around the bulkheads and made the forward one, the one the mast step and partner are against, full height. This will allow a small foredeck to be fitted, with storage underneath.
I think this will be a really usable little dinghy and I'm quite excited about the build. I just nee to keep the end in site and make sure I don't add so much unnecessary stuff that I can no longer walk the boat down to the ramp. Pictures will follow once I've got the deck fitted on the model.
I'm trying out the Selway-Fisher Rhum plans at 1:10 scale before trying it for real. The reason for this is I want to change the internal layout, moving bulkheads and fitting permanent side seats, and I want to make sure it all fits. Even small boats are fairly complex 3D shapes an it helps to make sure the visualisation I have in my mind will actually work for real.
Last night I swapped around the bulkheads and made the forward one, the one the mast step and partner are against, full height. This will allow a small foredeck to be fitted, with storage underneath.
I think this will be a really usable little dinghy and I'm quite excited about the build. I just nee to keep the end in site and make sure I don't add so much unnecessary stuff that I can no longer walk the boat down to the ramp. Pictures will follow once I've got the deck fitted on the model.
Oh, and I've pretty much decided that the boat will be named Hope, after this amazing instrumental by Rush guitarist Alex Lifeson.
Sunday, June 21, 2009
Blowing away the midwinter blues...
I went round to see a neighbour on Saturday. I took my Rhum dinghy plans and the 1:10 model that I've made of the hull. He has a Sunburst dinghy and I wanted to check dimensions of his side seats to see if a similar layout was possible in the Rhum. It turns out that the slightly stretched version I intend to build will be identical in length and beam to the Sunburst. Not only is this good news for the layout of seats, it also means that I can potentially buy of-the-shelf spars and sails for the Rhum rather than get a custom set made, possible saving a few dollars along the way.
While I was round, Daniel invited me out on his big boat for a race the next day. So Mid-winter's day I was on a 33' racing/cruising yacht reaching at 8.5 knots in a 20 knot southerly blow around Auckland's harbour. There were only 2 boats in our none-spinnaker class, but we won on the line and on handicap. We also beat 3 spinnaker boats over the line, and they had a 5 minute advantage at the start. It was a beautiful clear and crisp day, and putting up with the cold was well worth it for a great day out on the water.
While I was round, Daniel invited me out on his big boat for a race the next day. So Mid-winter's day I was on a 33' racing/cruising yacht reaching at 8.5 knots in a 20 knot southerly blow around Auckland's harbour. There were only 2 boats in our none-spinnaker class, but we won on the line and on handicap. We also beat 3 spinnaker boats over the line, and they had a 5 minute advantage at the start. It was a beautiful clear and crisp day, and putting up with the cold was well worth it for a great day out on the water.
Tuesday, June 9, 2009
The Island Bay Dory
So here it is, my one sheet dory design. I've only made a model of this boat so far, but I hope to make a life-sized version with my son in a couple of month's time. I'll probably use chine logs and glue and screw technique, rather than stitch and tape as documented here in the instructions. I'll document that technique as I build the boat.
If you want to have a go, please read the disclaimer and be realistic about this boat's ability. It's very small and has little load carrying capacity. The flare can be experimented with, more will add stability and buoyancy, but at the expense of freeboard, so its a smooth water only boat. Also, the flare adds rocker, so this boat will probably nod around. Perhaps a small amount of ballast in either end will help overcome this. If you weigh much more than 75Kg then be very careful getting in, I estimate that with that much of a load, the boat will sit around 150mm deep, leaving less than 150mm of freeboard amidships.
I had to post the instructions as JPGs because unfortunately the blogspot software does not allow such pleasant attachment types as PDF or DXF. If you build an Island Bay Dory, real or model, please let me know via the comments box.
If you want to have a go, please read the disclaimer and be realistic about this boat's ability. It's very small and has little load carrying capacity. The flare can be experimented with, more will add stability and buoyancy, but at the expense of freeboard, so its a smooth water only boat. Also, the flare adds rocker, so this boat will probably nod around. Perhaps a small amount of ballast in either end will help overcome this. If you weigh much more than 75Kg then be very careful getting in, I estimate that with that much of a load, the boat will sit around 150mm deep, leaving less than 150mm of freeboard amidships.
I had to post the instructions as JPGs because unfortunately the blogspot software does not allow such pleasant attachment types as PDF or DXF. If you build an Island Bay Dory, real or model, please let me know via the comments box.
Thursday, May 21, 2009
More Projects
I've not got much further with the proa plans, the basics are laid out in a CAD drawing but I need to refine my ideas before I can publish anything there.
Meanwhile, I read a book on DIY projects for the owners of cruising boats and saw a nice little 1-sheet dory style dinghy. I like the idea of trying something like this with my son, since he is light enough to float in it. I wasn't too keen on the shape of the boat in the book, but I liked the concept. I've worked on it some more and my second attempt came out nearly right. A little more refining and I'll have the plans available for the plywood part. It's not a true one-sheet boat because it will also require some wood for the seats and gunwales. And in fact to avoid exposing my lad to epoxy, I'll probably try making it with gluing batons planed to the right angles, polyeurathane glue and stainless screws.
Finally, I've also sent off to Selway-Fisher for plans to build the Rhum 11'6" dinghy in which I hope to learn to sail.
Meanwhile, I read a book on DIY projects for the owners of cruising boats and saw a nice little 1-sheet dory style dinghy. I like the idea of trying something like this with my son, since he is light enough to float in it. I wasn't too keen on the shape of the boat in the book, but I liked the concept. I've worked on it some more and my second attempt came out nearly right. A little more refining and I'll have the plans available for the plywood part. It's not a true one-sheet boat because it will also require some wood for the seats and gunwales. And in fact to avoid exposing my lad to epoxy, I'll probably try making it with gluing batons planed to the right angles, polyeurathane glue and stainless screws.
Finally, I've also sent off to Selway-Fisher for plans to build the Rhum 11'6" dinghy in which I hope to learn to sail.
Tuesday, April 14, 2009
Proa Model
OK, so here's the model proa I made. Its made in 1:10 scale, the real boat would be 4.8m long and 2.7m wide overall.
Not so amazing in itself, but there are a couple of things I was trying to prove. Firstly, I wanted the hull form and rig to closely mimic the White Heron, a Kiribati sailing canoe that is on display a the New Zealand National Maritime Museum in Auckland. Secondly, I wanted the design to be a modern translation, in plywood, with very simple shapes to minimize the need for complex lofting and also to use the fewest possible number of sheets.
I have a CAD drawing of the panels required to make the waka or main hull. It is possible to fit them all on 3 standard 1200x2400mm sheets of plywood, and I think 6mm ply would be sufficient for the job. The outrigger (ama) could be fashioned from a 100mm square fence post, 2400mm long by sawing crude point and then refining the shape with a coarse sanding wheel on an angle grinder. The spars could be akas (beams holding the ama) could be bamboo and the same possibly for the mast, but the spars I'm not sure on at the moment. To scale they are 4.5m long, sop probably scarfed and laminated softwood is looking the most likley. Softwood stock would also be required for gunwales, gluing battens and the mast and spar steps. The sail would be poly tarp.
Now the only problem is, I can't attach the PDF file I created from the CAD drawing, its a limitation of blogspot that I can't post attachments that aren't photo or video file types. This means I'll have to add more dimensional information before publishing them as jpegs, to allow others to lay out the panels. The great thing is, the shapes are so simple that I could almost manage a written description of each piece instead.
I'm not sure I'll ever build the real thing though. I've gone through the shunting process in miniature and its easy to imagine a disaster trying it for real at sea. I think the next step will be to develop a smaller version of the hull, 4 metres length at most, and equip it with a tipping Gibbon's rig.
Thursday, April 2, 2009
Boats and Boat Names
The kayak doesn't really have a name. I have jokingly referred to it as 'Bullseye' and the double that is to come as 'Double Top' in reference to the design name of Dart and the cult but awful British darts quiz show. I don't think kayaks are boat enough to bare a name though, but that's not the case with subsequent builds.
Currently I have half-hatched plans for a 16' 3-ply sheet proa. I've got a model made that proves the shapes I have designed end up looking like a boat of sorts, I've just the rigging to add. Because I intend to make this boat for very little money, most of the materials will be sourced from large DIY outlets, and so I thought the name 'Big Shed' appropriate. I'd like to have this in Maori, or even better, what ever the native tongue of the Marshall Islands is, but I'll have to be careful to get a good translation and not rely on Internet tools of questionable validity.
Since starting the model, I've been thinking about the difficulties of shunting the real thing (changing the end of the main hull at which the sail is tacked and changing the direction of travel while keeping the outrigger to windward). One solution is to go for a sail with no lower spar and the upper spar hoisted from its mid-point. Such a rig is tipped from one end to the other and is called a Gibbon's Rig. I think it would suit a smaller, single-handed proa and would have to be called the 'Funky Gibbon'. I think it would have a large silhouette of a brachiating gibbon painted on the polytarp sail just for good measure.
These are side projects. I really want to get going on making a dinghy over the winter so I can learn to sail in my own boat. I've decided on another Selway-Fisher design, the Rhum. It will be light enough to trolley down to the beach, can take a small outboard for a spot of fishing and can be rigged with a Gunter rig, similar to the UK Mirror dinghies. It will need a name and I've been thinking along musical themes. I've been looking through song names by my favourite bands to some up with something less in jest than the proa names. Likely candidates are 'Hope', 'Spindrift', 'Red Barchetta' (but only if I paint it red, which is unlikely because its a notoriously difficult colour), 'Working at Perfekt', 'Born of Frustration', 'Anthem', 'Earthshine', 'Beautiful Machine' and 'Pacifier'.
'Pacifier' is likely to be reserved for a bigger boat, should I not like the name it comes with. I like the idea of its relation to Pacific, as in the ocean and the calming affect that messing about in boats tends to have. Rather than building a camp-cruising boat, I'm on the lookout for a good trailer-sailer with sleep-aboard accommodation for 4. This needs a bit of preparation work, firstly I need to learn more about sailing (hence the dinghy build) and secondly, I need to prepare a space on the driveway; more landscaping work.
Currently I have half-hatched plans for a 16' 3-ply sheet proa. I've got a model made that proves the shapes I have designed end up looking like a boat of sorts, I've just the rigging to add. Because I intend to make this boat for very little money, most of the materials will be sourced from large DIY outlets, and so I thought the name 'Big Shed' appropriate. I'd like to have this in Maori, or even better, what ever the native tongue of the Marshall Islands is, but I'll have to be careful to get a good translation and not rely on Internet tools of questionable validity.
Since starting the model, I've been thinking about the difficulties of shunting the real thing (changing the end of the main hull at which the sail is tacked and changing the direction of travel while keeping the outrigger to windward). One solution is to go for a sail with no lower spar and the upper spar hoisted from its mid-point. Such a rig is tipped from one end to the other and is called a Gibbon's Rig. I think it would suit a smaller, single-handed proa and would have to be called the 'Funky Gibbon'. I think it would have a large silhouette of a brachiating gibbon painted on the polytarp sail just for good measure.
These are side projects. I really want to get going on making a dinghy over the winter so I can learn to sail in my own boat. I've decided on another Selway-Fisher design, the Rhum. It will be light enough to trolley down to the beach, can take a small outboard for a spot of fishing and can be rigged with a Gunter rig, similar to the UK Mirror dinghies. It will need a name and I've been thinking along musical themes. I've been looking through song names by my favourite bands to some up with something less in jest than the proa names. Likely candidates are 'Hope', 'Spindrift', 'Red Barchetta' (but only if I paint it red, which is unlikely because its a notoriously difficult colour), 'Working at Perfekt', 'Born of Frustration', 'Anthem', 'Earthshine', 'Beautiful Machine' and 'Pacifier'.
'Pacifier' is likely to be reserved for a bigger boat, should I not like the name it comes with. I like the idea of its relation to Pacific, as in the ocean and the calming affect that messing about in boats tends to have. Rather than building a camp-cruising boat, I'm on the lookout for a good trailer-sailer with sleep-aboard accommodation for 4. This needs a bit of preparation work, firstly I need to learn more about sailing (hence the dinghy build) and secondly, I need to prepare a space on the driveway; more landscaping work.
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