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Have a look at a few previous bespoke builds Seastrike have designed for previous customers. Whether you chose semi-vee, semi-flat, flat or a custom boat, all are constructed from marine grade aluminium to the highest possible standards. Built in Great Britain since Our Range. Contact us. Perfect for both fishing and family use.
Click here for more information about our plans and kits. I am now getting ready to outfit the interior, build the helm, [�]. Choose one of the categories below, click on a boat for the listing of items available plus more info and photos. Simple as that� get started today! If you know the boat design name, use our Alphabetical Design Index Design Characteristics � Boat drawing with all parts listed.
Order a Hard-copy of the Catalog Click here for more information about our plans and kits. January 30, at pm. Connect with us:. Customer Builds. Completing the ends of such extrusions where they join to transom and stem areas is also not always easy for the builder making a single boat. However, if the protruding flange is too pronounced, there may be a tendency to hang up on rocks in certain boats such as whitewater boats, or snag debris and catch pilings in other types of boats depending on their use.
Otherwise, round bar bends around frames easily and gives a well-defined boundary to work to when fitting side and bottom plates. A temporary chine backing member may help in this regard. In this case the bottom is fitted first and cut with care along the chine line a temporary backing member may aid in fitting.
Then topsides are installed, letting the edge overhang the junction a distance as required to form the spray deflector flat. While a good design, this configuration also 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 can cut your own from plate. Other stiffeners are often extruded shapes that can get costly and may not be as readily available in the sizes needed.
When installing longitudinals, bending can present problems depending on curvature and member type. One approach some builders take to reduce bending effort is to gore members along their flanges as in Fig.
This idea is sound, but the execution takes care 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 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 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 � 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 with light plating and framing is lighter in weight for more-economical operation, has a higher speed for a given power, is more-easily 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 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 favor lighter scantlings, but for more rigorous duty, heavier construction may be justified.
However, rather than simply increase plating thickness, you might get similar results by adding a few more internal stiffening members instead. An appealing possibility on metal boats is tanks integral with the 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 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 should stop at tank ends, with similar members cut and fitted inside, or with internal baffles installed in line with such stiffeners as substitutes and to maintain continuity. Conversely separate tanks built outside the hull are physically easier to manipulate during assembly and welding, easier 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 should be at least. Thicker tanks also require less stiffening, and since plating material is usually suitable, no special thinner stock need be 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 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 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 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 and development costs will be amortized over a great number of boats.
And the labor savings would no doubt make up the investment manifold over time. Second, facilities for pre-cutting metal boats are currently far and few between, and not all have equal capabilities and expertise when it comes to boats.
Third, if a do-it-yourselfer is not near such a facility assuming a design is available , shipping costs can be prohibitive on just a single unit. Finally, although there are some designs available often because a builder gives up his design 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.
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