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Under sail, with her new suit of canvas from Carol Hasse's Port Townsend Sails loft and a revamped rig, Building Small Steel Boats including a new mast track to replace the former in-mast furling mainsail , we've made speeds of nearly 10 knots when close-reaching in 15 knots of wind. Honestly, it's like we have a brand-new boat. Luckily, we've yet to sail Ocean Watch in truly heavy air and storm-tossed seas. That day, no doubt, is coming soon. But if what we've seen thus far is any Building Small Steel Boats Building Small Steel Boats Building Small Steel Boats indication, we're more than a little optimistic about how she'll fare.
We've got a lot of confidence in our boat, which any sailor knows is a very good thing to have. And considering my first misgivings, that's been a very pleasant Building Small Steel Boats Building Small Steel Boats surprise. Lists of materials - Technical information - Numerous construction drawings are all included. Winds were sustained 35 knots gusting higher.
The Carol Building Small Steel Boats Lee is a steel 65 foot long cutter rigged sloop. This video was taken shortly after sunrise just south of Cape Mendocino. Super Building Small Steel Building Small Steel Boats Building Small Steel Boats Boats fun! Bruce, video of one of your designs surfing down waves. That's me on the helm. She looks pretty rough and needs a paint job but we are slowly improving her while we cruise. We love her because she was well made and has Building Small Steel Boats Building Small Steel Boats good bones. A great design. Regards Carley. A shorter deeper keel is available Cutter, Sloop of ketch sail boat plans can be used on this version.
Note the optional longer shoal keel is shown in this profile view. While a good design, this configuration also Building Small Steel Boats takes care to assure fair lines. As mentioned, on the modern aluminum hull, most plating is reinforced by longitudinals.
While a good set of plans will specify what to use for these members, this does not necessarily rule out another alternative if what is specified is not available.
These are available in many sizes, often in the form of extrusions with radiused edges that facilitate welding, or you Building Small Steel Boats Building Small Steel Boats can cut your own from plate. Other stiffeners are often extruded shapes that can get costly and may not be as readily available Building Small Steel Boats in the sizes needed. When installing longitudinals, bending can present problems depending on curvature and Small Cabin Pontoon Boats member type. One approach some builders take Building Small Steel Boats to reduce bending effort is to gore members along their flanges as in Fig.
This idea is sound, but the execution takes care Building Small Steel Boats Building Small Steel Boats to assure fair curves. Good practice also calls for radiusing the corners at the gores slightly to minimize hard spots against the plating. Avoid over-welding, and completely around the ends of each cut.
This allows a strong fillet weld on both sides of the junction Building Small Steel Boats the inside weld can be intermittent. A simple corner junction here as in Fig. In fact, some builders extend the bottom plating considerably past the transom on faster planing hulls to form integral non-adjustable trim tabs. These can later be bent down slightly if required Building Small Steel Boats for best performance and then bracketed to the transom once an optimum position has been found. Transom thickness technically need be no more than that of the side or bottom plating.
Additional thickness may be required � at least in the area of the cut-out � Building Small Steel Boats either through the use of doublers or thick inserts. A thicker insert is preferable at a cutout to avoid the need to seal joints between doublers by welding. Where thin plating meets thicker plating, bevel the thicker edge at a slope equal to at least three times the thickness of the thinner plate see Fig.
The insert should have rounded corners rather than being a hard square or rectangular shape. There is an on-going debate as to whether welded aluminum boats should be made as light as possible via light plating and framing but with more of it , or with heavier plating using minimal but also somewhat huskier framing members. A boat built Building Small Steel Boats with light plating and framing is lighter in weight for more-economical operation, has a higher speed for a given power, is more-easily Building Small Steel Boats Building Small Steel Boats trailered, has greater payload, and because it has less material, will cost less.
First, there is a natural tendency among builders in any material to over-build and second-guess the designer, even when a boat uses the heavier plating approach initially. The typical idea is that if Building Small Steel Boats Building Small Steel Boats so much is good, then a little more must be better. The result is that such boats weigh more than the designer predicted.
You guessed it � NOT the builder. Much depends on the boat and its expected service. For pleasure boats, I tend to Building Small Steel Boats favor lighter scantlings, but for more rigorous duty, heavier construction may be justified. However, rather than simply increase plating thickness, you might Building Small Steel Boats get similar results by adding a few more internal stiffening members instead.
An appealing possibility on metal boats is tanks integral with the Building Small Steel Boats hull, which is acceptable for diesel fuel but not gasoline. Because the hull shell plating provides one or more of the tank sides, and internal tank members can double as hull stiffening members, such tanks can save material and add capacity without taking up more room. First, tanks might be of such a size or located in such a position that welding tight seams all around the perimeter Building Small Steel Boats is difficult if not impractical.
Second, because full welds are required, there is a greater chance of heat buildup and ultimate hull plating distortion. Finally, special consideration must be given at the intersections of tank ends, hull stiffening members, and internal tank baffles when required.
Attempting to fit and weld tank ends tightly around stiffeners that pass through the tank is tedious if not impossible. Instead, hull stiffeners Building Small Steel Boats Building Small Steel Boats should stop at tank ends, with similar members cut and fitted inside, or with internal baffles installed in line with such stiffeners as Building Small Steel Boats substitutes and to maintain continuity. Conversely separate tanks built outside the hull are physically easier to manipulate during assembly and welding, easier Building Small Steel Boats to test and assure integrity, easier to repair or replace, and not as likely to suffer damage in a collision.
Aluminum tank thickness is sometimes shown as a function of tank capacity such as the following:. To 50 Gals:. However, for practical purposes, most tanks Steel Small Boats Building should be at least.
Thicker tanks also require less stiffening, and since plating material is usually suitable, no special thinner stock need be Building Small Steel Boats ordered as might be implied from the above list. Also provide striker plates or doublers on the bottom under sounding tubes if being used to prevent damage to the inside of the tank. All tank tops should be canted, sloped, or cambered so condensation or moisture will drain off the tops. Tanks can be made out of the same material used for the hull plating , , etc.
Special computer-aided Building Small Steel Boats Building Small Steel Boats design programs coupled with numerically-controlled cutting equipment have made it possible to literally pre-cut all the components of a metal boat to precise Building Small Steel Boats Building Small Steel Boats Building Small Steel Boats Building Small Steel Boats size and shape in kit form ready for final welding assembly. However, for successful results, a skilled boat designer familiar with the material and fabrication techniques, along with the ability to operate the software to within exacting tolerances is a prerequisite.
Otherwise, as they say, a miss can be as good as a mile. If one major component is not spot-on, you could waste a lot of Building Small Steel Boats Building Small Steel Boats costly metal quickly and perhaps assemble a boat that could be so inaccurate as to suffer severely performance-wise. But done right, the system has inherent appeal since such boats should be easier and faster to assemble.
Is this technology suitable for the do-it-yourselfer building just one boat? It depends. The ability to provide such a technologically-advanced product does not come cheap.
For the production builder, the higher design Building Small Steel Boats and development costs will be amortized over a great number of boats. And the labor savings would no doubt make up the investment Building Small Steel Boats manifold over time. Second, facilities for pre-cutting metal boats are currently far and few between, and not all have equal capabilities and expertise Building Small Steel Boats when it comes to boats.
Third, if a do-it-yourselfer is not near such a facility assuming a design is available , shipping costs Building Small Steel Boats can be prohibitive on just a single unit. Finally, although there are some designs available often because a builder gives up his design Building Small Steel Boats rights for one reason or another , design choices are minimal. A design where you build from scratch and cut out your own parts may take somewhat longer to build, but will be the low-cost alternative.
And there are countless stock plans to choose from, many at a low cost. One-off Versus Production Building Methods � Similar Results, But Different Approaches Required The would-be do-it-yourself aluminum boatbuilder already familiar with aluminum often has his roots in a non-marine production fabrication setting. Framed Boat Advantages for Do-It-Yourself Builders Using a frame substructure Building Small Steel Boats for setting up your hull has several advantages for the do-it-yourselfer typically working alone.
Some Considerations On Changing From Steel To Aluminum Aluminum is not as strong as steel so some compensations must be made if using it in place of steel. A Practical Rule Of Thumb Converting from steel to aluminum is fairly straight-forward mainly because the members used are much the same in configuration and the Building Small Steel Boats Building Small Steel Boats methods of design and construction are similar.
Comments are closed. In terms of our peace of mind on the water these are all Building Small Steel Boats very favorable characteristics. We will then be confronted with the inevitable question, "Aren't steel boats ugly? In the hands of amateurs the unfortunate answer is all too often yes However if designed with finesse in terms of aesthetics, a steel yacht will be every bit as elegant and graceful as a boat built with any other material, bar none.
We have observed, both in our own lives Building Small Steel Boats and in the lives of others, that " Form Follows Budget. At the time of building and during a vessel's ownership, steel Building Small Steel Boats is at first a very economical material for boat building, and then, if properly built, an easy boat to take care of.
You Building Small Steel Boats will not for example be repairing stove-in planking nor dry rot nor smashed and ruined fiberglass structure nor will you have to deal with fiberglass boat-pox. In general you will be able to go boating without the incipient fear of running into stuff In modern times since the mid-fifties proper surface preparation sandblasting and modern coating systems epoxy paint have been well known and have allowed small steel Building Small Steel Boats boats to last a very long time.
Steel, after all, does not change with time unlike wood and plastic , therefore its life is Building Small Steel Boats simply a matter of how well it has been protected by the builder.
Due to weight considerations, it is not optimum to design small steel yachts with a corrosion allowance of any appreciable thickness. Thus the original application of protective coatings by the builder is quite important. In terms of maintenance, the proper care of any vessel involves keeping up its paint system. If the paint system has been correctly applied to a steel vessel by the builder, one can expect very much the same maintenance regime with a steel Building Small Steel Boats boat as with a fiberglass boat - but without the ordeal of "boat pox".
The key to easy maintenance and long life is Building Small Steel Boats Building Small Steel Boats proper application of the paint system at the time of building. In order to address this necessity when creating a new metal Building Small Steel Boats boat design, we add an 8 to 12 page Paint Specification as a supplement to our usual 40 to 70 page Vessel Specification.
In our Paint Specification, the vessel's original coating application and subsequent maintenance are explicitly laid out for the benefit of owner and builder. For more information on these matters, please see our article on Corrosion Prevention. With regard to displacement, we observe that the Building Small Steel Boats volume of any object varies as the cube of its dimensions l x w x h. In order to compare the relative heavy versus light displacements of vessels of different sizes, it is desirable to "equalize" them mathematically via some "non-dimensional" means.
Written as an equation:.
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