Senin, 13 Juni 2016

More photos of Fleet the planing version of Flint

The first example of Fleet, the planing hull version of Flint is getting much closer to launch day. In fact she has already been in the water to allow the marking of the waterline in preparation for the painting of the boot top - empirical data gathering!

Painting has gone ahead at a great rate, using the skills of people who normally apply coatings to aeroplanes and helicopters.

First real opportunity to view the hullform in the flesh.

 The hull shape is similar to the designs of the late William H. Hand, said to have been the inventor of the vee-bottomed motorboat. What made the William Hand designs significant was the way they would handle well at lower speeds when throttled back. Weston Farmer said of them, "They were steerable throughout their entire range of speed in following seas. The full planing boat is a dog in this department. Unless they are banging along full bore, you cannot steer them. And full bore in some seaways with this type of boat, demands Polident for the helmsmans teeth and metal brassiers for the ladies." ("From My Old Boat Shop" International Marine 1979.) Now, I think planing hull design has come some way since Weston Farmer formed his opinion, and there are some very fine designs around for full planing hulls, but the fact remains that for moderate planing and semi-planing speeds, a long, narrow Hand-style hull can be superb.

Getting ready for a trip down to the boat ramp for waterline marking. Gunwales are masked, as they will be finished bright using Deks Olje #1
First splash. Chines dont even touch the water when light. I hope that with a single oarsman on the forward thwart, the boat will be reasonably pleasant to row, even though she is a planing hull. Trim will be everything with passengers aboard.
25 litres of water in the aft well to represent the outboard and fuel, plus two people. The fellow on the helmsmans thwart is quite light, but the trim is very close to that predicted on the plans.
After the floatation tests, marks were made to allow masking-off for the boot-top.

Note the chinagraph pencil marks at the base of the stem.
Boot top masked ready for topside painting
Here you can visualise the fine, sharp lines up forard - she should give a smooth ride at moderate speed in a chop.
Almost ready for the water - just the oiling of the gunwales and breakwater/coaming to go. Test motor will most likely be a 6HP 4-stroke, but that is to be confirmed.

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Minggu, 12 Juni 2016

Boat Kits and Information About Kits

Tis the season for kitting out boats here in the shop. It is keeping the business very busy as we finalize the Goat Island Skiff kits and in January well be "kitting" Clints design, the Drake Rowboat.

FAQs

What is unique about our kits?
Clints kits are the equivalent of a professionally built boat, dry fit to perfection, and then taken apart and packaged so that you can replicate the results at home. That means the hull lines will be "eye-sweet" and beautiful when you assemble the boat. The numerous and subtle tweaks that a professional builder does to make the lines of a boat sing has been done for you. This is the unique part of our kits: the kit is not cut directly from a computer file, but rather comes from directly from a hull built by an accomplished boat builder.

What is included in a boat kit?
Our kits have a number of options to suit your timeline and budget. One option will always include plans and the plywood components, planks and bulkheads or molds. The plywood is BS1088 Okoume and comes from Maine Coast Lumber, a trusted source for us. Timber kits are available. Pre-laminated components are available, frames, stems, and backbone components. A further option is a complete timber kit that gets you set up with seats, gunwales, floorboards and all the wood you need to build the boat. You can see kit information at our website kit information page.

Why buy a kit?
When I suggest to people that they buy a kit they sometimes are offended because they feel we dont think they have the skills to make their own kit. The truth of the matter is that we build our own boats from kits as well. In fact, a successful Pro Boatbuilder will build from boat kits himself. The reasons are the same as for you and me: it saves a lot of time, it saves money due to less waste in materials and less wasted time, and the results are a better boat. The boat fits together with less fuss and the lines are reproducibly beautiful every time.
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A new rig for a Goat Island Skiff Spruce for Roger Longs Yawl Dory and more Birdsmouth Masts and Spars

The finished mast and spars delivered and stepped into John Goodmans Goat Island Skiff Yawl #1 in Houston, TX. John does the Texas 200 in a few weeks!





To find good spruce you need to go right to the source. I enjoyed some wonderful walking with a customer who is having a Yawldory by Roger Long, N.A., built and wanted the Spruce for the spars, masts, and oars (my job) to come from her friends land. We walked (i.e., bushwacked) and tagged a few nice Spruce trees.

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Birdsmouth Masts under construction for a Michael Storer Goat Island Skiff. With Michaels blessing, Clint drew a yawl rig for the boat.

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Posted


Varnishing the Sitka Spruce/Northern White Spruce Birdsmouth mast allows the grain of the Sitka to deepen and develop the contrasting lighter-colored Northern White Spruce. You get some of the benefits of Sitka for half the cost by mixing it with the local spruce we get hear in Maine and Canada.

The two masts are for the Goat Island Skiff, a birdsmouth on the left and a hollow-rectangular mast on the right. The mast on right is a customers that I took in to check for chafing and leathered the chafed areas to prevent more.
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Open Water Rowing in Casco Bay


"I like to get out there sit in the swell and look out" is how I think of a pleasant row in my home waters of Casco Bay, Maine. Along with dreaming of boats, like Cullers Otter, I dream of where to go in the boats. Next years big row is out to Halfway Rock in the middle of Casco Bay, about 15 mile offshore. You can also see a large scale chart of Casco Bay.

Rowing in open water like this scares the hell out of me. When I sit there, in the swell, looking out, the butterflies flutter inside, making it more challenging to assess the situation and peruse the mental checklist of precautions. Weather window, ferry traffic, tidal currents, my energy level, time of day, schedule back on land, amount of food in the dry bag, do I have all the gear I need, what is plan B, plan C....

But I am learning that these butterflies are annoying but good; they keep me alive and ultimately confident. Once I am out there in open water, and I am feeling strong, confident in the boat, and having a blast, I relax and therefore row better. In my open water boat, Drake, I can cover about 4 nm per hour and that is an average. Time slips away and life is good. Christmas has been wonderful, and the weather cold, and now I begin to plan big rows for next year. I am training for long distance rows and hope to make a 20-mile row somewhat routine. Halfway Rock, located below the Not in "Not for Navigational Use" is uncannily "halfway" between the Eastern and western points that define Casco Bay. It is an exposed rocky isle with a lighthouse. Landing there will be difficult, so when I row there next summer, it will be my longest pull yet, at least 25 miles total, depending on the exact route.

Time to dream, be patient as the sun makes its way back north, and time to get in shape!
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Petrochemical Free Cruising

Last month at the Wooden Boat Festival in Port Townsend I attended an interesting presentation by Capt. Peter Wilcox, Master Mariner and President of Columbia Riverkeeper. His subject was "NOAAs Green Ships Show the Way for Northwest Boaters", subtitled "Long-term test results of 100% biodiesel and biolubricants, state of the art electric power and the future of low impact, low carbon boating".

Capt. Wilcox started by detailing what the effect is on the oceans and their inhabitants from the acidifying effects of the carbon dioxide produced by burning fossil fuels. Most of this carbon dioxide ends up in the ocean either directly or via rivers. This upsets the balance of nutrients, oxygen and clean water that most marine life needs to survive. Some of that marine life is under threat of extinction.

in 2009 he launched the motor-sailer "Ama Natura" for cruising and exploring the inside passage, built for him by Northwest School of Wooden Boatbuilding. His boat was equipped to operate totally free from petroleum derived products. He followed the example and practices developed by NOAA for their fleet of green ships on the Great Lakes. NOAA have also assisted in the conversion of other vessels and the program now covers more than 200 NOAA and commercial vessels across the USA.
"Ama Natura" - Photo courtesy of Capt. Peter Wilcox
The NOAA green ships program was initiated in 1999, through the NOAA Great Lakes Environmental Research Laboratory (GLERL). Their vessels run on B100, biodiesel derived 100% from soy, a renewable energy source. In addition to the fuel, all of the lubrication and hydraulic products used on these vessels are plant-derived, from soy, rapeseed and canola oils.

Benefits that NOAA has seen from this program are numerous.

 Environmental & Social Benefits
? Decreases emissions of fossil fuels that contribute to climate change and air pollution
? Lessens risk of environmental harm in the event of a fuel spill
? Reduces dependence on imported oil
? Supports agriculture and the U.S. economy
Operational Benefits
? Improves engine performance
? Extends engine life
? Reduces need for engine maintenance due to cleaning properties of biodiesel
? Reduces operating and maintenance costs by 20-40% vs. petroleum-based fuels
Human Health Benefits
? Reduces exposure to harmful and cancer-causing chemicals
? Reduces seasickness due to less offensive odor

Biodiesel is cleaner than petroleum-based diesel, which is behind many of the benefits. These show in longer lifespan of injectors, fuel pumps and filters, also in reduced or disappearing cleaning costs for tanks, fuel lines and other components of the fuel system.
Washington State ferry "Spokane" runs on biodiesel
The emissions reductions of biodiesel compared with diesel, as reported by NOAA, are impressive.
? Total unburned hydrocarbons -77%
? Carbon monoxide -48%
? Particulate matter -59%
? Nitrogen oxide -7%
? Sulfates -74%
? Polycyclic aromatic hydrocarbon -66%

Biodiesel can be made from many plant sources, so can be adapted to the most suitable renewable crop or waste material. Used cooking oil can also be filtered and reprocessed to produce biodiesel, for a very cost-effective fuel. GLERL has seen a 20-40% reduction in operating costs on its fleet since converting to biodiesel and other bio products.

For more information on the NOAA program, read the NOAA Green Ships Initiative.

Biodiesels continue to be developed. Second generation formulations offer longer stability, higher octane ratings and lower waste. Biolubricants are also improving, allowing 100% improvement in oil life.

The NOAA clean ships program appears to be a good one, with major long-term benefits for the world in general and for boaters in particular.

Dudley Dix
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ClubSwan 50 Review

For roughly the last fifty years Nautors Swan yachts have represented the epitome of quality and performance. Their yachts tended to be a bit heavy for my taste but always embodied classic elegance of design, very respectable performance and very high quality construction. In 1998 the company was acquired by an investor group led by Leonardo Ferragamo, a director of the fashion empire of the same name. I think that since he came aboard, the Swan brand has reached new levels of style and elegance.

In the early years Swan relied on the firm of Sparkman and Stephens to produce their designs. Later they turned to German Frers for the majority of their boats. It was a good choice since Frers had been with the S&S firm at the time they were engaged with Swan, and was arguably their best designer.

Frers left S&S in 1968, eventually returning to his native Argentina where he took over the family design firm while Swan engaged Ron Holland to design their boats.  In the 1980s Frers reconnected with Swan and since then has produced a long string of beautiful designs for them, including the 45 and  42 one-design racer/cruisers and the elegant Swan Regatta 60. So it is somewhat of a surprise to me that Swan turned to Juan Kouyoumdjian for their newest design.

Interestingly, Juan K, as he is known, is also an Argentine, although his design firm is located in Valencia, Spain. I had heard a few months ago that he was working on a new design for the company and expected it to be an incremental development of their current design trend of lighter racer cruisers with plumb bows and elegant appointments. I was wrong.

Swan unveiled the new design a couple of months ago with a series of drawings and renderings which I downloaded and include below. As you can see, the new boat is a significant, one might even say radical, departure from what we think of as the Swan Style. The ClubSwan 50 is intended to be a high performance one-design racer with accommodations for distance races and, as Swan calls it, sports cruises.

Lets start with the hull. The first thing that catches the eye is the reversed bow and sheer. Students of yacht design know that reversed bows have been used on racing catamarans for the last fifteen years or so. The purpose of this shape is to maintain maximum waterline length while reducing the weight and windage of the bows. This makes a lot of sense on boats that frequently fly the weather hull or, as in the case of the AC72 cats, simply fly.  This shape is harder to justify on a ballasted monohull, especially when it is fitted with a large bowsprit that pretty much negates any weight or windage savings. Regardless of any performance benefit, the reversed bow profile is certainly a strong aesthetic statement that is complimented by the reversed sheer. The reversed sheer enables the designer to keep the freeboard at the bow and stern minimal yet still provide enough headroom amidships with a cabin trunk of minimal proportions. This is a design feature more often found on smaller boats than the CS50. There is a pronounced chine aft that appears to run nearly to the bow in the renderings. Bear in mind that we are dealing with renderings and not photos of an actual boat, so the finished product may be different from what we see here. Notice the flare in the aft topsides. I dont know what hydrodynamic principle would require this shape but, again, it makes a strong aesthetic statement.



New Club Swan 50. A bold step forward for Nautor.
The fairbody line of the the CS50 shows a very shallow hull with the knuckle of the bow just at the waterline, while the stern is lifted slightly above it. In the stern view, notice the arc-like shape of the hull at the transom. I think this boat will surf easily and leave a very clean wake when driving upwind. Im not a huge fan of twin rudders unless they make a meaningful contribution to the performance of the boat. In the CS50, they are relatively small so that when heeled, the weather rudder will usually be out of the water, so at least it wont be much of a drag most of the time.  Still, if I were to order a CS50 for myself, Id ask them to show me the hydrodynamic data that prove twins are better than a single centerline rudder. The keel is exactly what we would expect on a boat of this type, a deep steel fin with a lead torpedo shaped bulb.

Here are some numbers:

LOA:  50.00
LWL:  45.93
BMAX;  13.78
Draft (deep): 10.50
Draft (shoal): 7.22
Disp: 20,503 lb
Ballast: 7,496 lb
Sail Area (upwind): 1,527 sf
Sail Area  (downwind): 3,185 sf
D/L: 94.47
SA/D: 32.74

With a SA/D of nearly 33 and a D/L of 94, there is no doubt that the CS50 will be as fast as it looks. I am intrigued by the rig proportions. Notice that the three-spreader carbon mast is located significantly further aft than we usually see on high performance boats. I dont have any rig numbers but the "J" dimension is clearly longer than "E", which means that the jibs on this boat will be quite large relative to the mainsail. In the sailplan below, the boom doesnt quite reach the transom and the traveler appears to be at least a couple of feet forward of it, but in other drawings and in the literature, the traveler has been located all the way aft. Either way, this is a powerful rig that will take a full crew to get the most out of. On the other hand, the brochure states that when its just the husband and wife aboard, theyll hoist the main to the second reef and unroll just the small jib, which should provide adequate performance for a leisurely daysail. Of course all the winches will be electric so the hoisting and trimming will all be done by pushbutton. With the main hoisted to the second reef the square top of it will pass inside the twin running backstays so you wont have to ask the wife to scamper over and tend them when you tack. Sounds pretty civilized to me.





Interesting proportions of the CS50 rig.



The deck of the CS50 leans more toward racing than cruising. There are minimal coamings from the companionway to the aft end of the seats.Aside from that, I dont see any concessions to cruising comfort on this deck except for the short cockpit seats.  The transverse jib tracks are located on the cabin top and the chainplates are all the way out at the sheer, leaving the decks uncluttered. There doesnt appear to be a provision for leading jib sheets to the cockpit winches so I assume they are led to the cabintop winches. I was aboard a  new Swan 60 a few months ago and on that boat many functions such as vang, outhaul, traveler controls, etc. were managed by pushbutton. Indeed, the panel of buttons at the helms was extensive. This kind of arrangement might free up those cabintop winches for the jib sheets but I think a better solution would be to move the tracks to the deck and use barber haulers to move the jib clews inboard and out, and lead the sheets back to the cockpit winches.
The cabin is wedge shaped and somewhat reminiscent of the old Swan wedge decks. Somehow I cant quite picture an inflatable dinghy stored on that foredeck even though there is certainly plenty of room for one.

 The cockpit is huge, with plenty of wide open space for the working crew. The companioway hatch is sloped at about 45 degrees. Ill wager that the production model may well end up with a more conventional sliding hatch and seahood. The aft part of the deck is basically cantilevered out from the hull with sharp radii where it joins the hull.  This is not a particularly strong arrangement and there appears to be a strut that that supports the aft-most part of the deck. Notice that this bit of deck supports the mainsheet and spinnaker sheet winches. Im  sure J&J Design, who are listed as the project engineers, carefully analyzed this area and designed the laminates and geometry to resolve the high loads this area will experience when the boat is pressed.

The transom is wide open with the traveler  located as far aft as possible. The companionway hatch is set at an angle and the aft end of the weather deck appears to be supported by a strut near the transom. 
Beam is carried straight aft to the transom. 
Notice how small the rudders are relative to the keel. They appear to be no more than about 50 inches deep and are angled outboard about 20 degrees. They will probably be deeper than that in the production boat.  In this drawing the boom extends well beyond the twin running backstays. 


Accommodations in the CS50 are Spartan by Swan standards but I would feel quite comfortable spending a month or two living aboard this boat. The head runs the full width of the boat, or more precisely, is split by the centerline passageway, with the toilet and sink to port and a nice large shower to starboard. I really like this arrangement. In the bow youll find what appears to be a queen size berth along with lockers and shelves. Notice that it is set roughly eight feet aft of the bow, forward of which appears to be a crash bulkhead and lots of empty space. Swan states that all of the forward cabin furnishings can be easily removed for racing.



Simple, efficient accommodations.
The main salon is wide open, with very large settees to port and starboard, and a decent sized dining table on the starboard side. If I owned a CS50 Id want to entertain a lot, so Id have Nautor make sure the table will accommodate at least six diners. Aft to port is a smallish galley suitable for basic meal preparation. Notice the generator just aft of the galley. I think it might be a good trade-off to eliminate it and expand the galley a bit. Opposite the galley is a quarter-cabin with what looks like a king size berth and a hanging locker. This will be the nicest place to sleep when the boat is underway. The nav station is...well, there doesnt seem to be one on the CS50. I think this is because in a daysailer and weekender, you really dont need a nav station because all your navigation tools are in the multi-function screens at the helm stations. Still, Id like to see a chart table/desk on the boat. I dont use the nav station aboard my Beneteau 423 for navigating, but its a perfect all purpose place to work the SSB radio, manage ships papers and do all those mundane things I do at my desk at home.

I really appreciate that venerable, conservative Nautor has gambled on a truly new design for the 50. Having been a lifelong fan of German Frers designs, I would like to have seen what that firms answer to this design brief would have been, but Juan K got the nod instead. This is a bold step for Nautor and my hope is that it will be a huge success for them. I cant wait to see hull number one hit the water. For more information about this boat visit www.clubswan50.com.



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Sabtu, 11 Juni 2016

Back to business boat kits and complete boats


First off, I am now in 100% complete control of my Gmail account again. Someone in Egypt hacked in because I was not careful enough about protecting my password. Upgrade passwords and never have it on email anywhere! Learn from my mistakes. My email, boatkits@gmail.com, is completely safe, now.

Pictured is a recent boat kit heading out of the shop...CNC (computer numerically control) precut plywood kit and a timber kit. The pieces of mailing tubes over the ends of the long parts protect the precut scarf joints while the kit is shipped (this one a kit to Durango, CO).

Back to business and to pick up from the last few posts, I want to share a PDF and link to my webpage about how my kits are produced, why it makes more sense to built boats out of my catalog from kits or full size patterns, and the general idea regarding the economics of boat kits (i.e., why the extra cost of a boat kit is smaller than many think) will come next time.

http://www.clintchaseboatbuilder.com/CNC.html

My pitch for building from boat kits PDF (Google Docs)

In a nutshell, boats designed in the computer are actually drawn full size already to a higher degree of precision (thousandths of an inch) than on the lofting full size by hand (1/16ths of an inch). The difference is that a planks can be precut in advance, glued together with a precut scarf, and bent around bulkheads, hitting every mark on the spot. Interior components and the building jig itself are drawn into the computer model to exactly fit the boat. Therefore, to take a computer aided drafted (CAD) boat and loft it by hand introduces natural errors that were carefully avoided in the CAD process.

Because the parts can all be predetermined off the computer model, they can be nested onto fewer sheets of plywood than a manually (scratch-built) boat can be done. Also, it avoids cutting mistakes which often requires buying extra wood. This offsets the extra cost of a kit and wastes less wood.

The time it takes to manually cut parts to a boat, if you look at it in a hourly rate kind of way, would also offset any remaining difference in cost between building from scratch versus building from precut parts in a kit.



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