Mono-Hull Boats | Aluminum Boat Plans & Designs by Specmar Whether it�s a planned adventure or a spur of the moment trip, we know that fishing is more than the thrill of a great catch, it's a way of life. At Alumacraft, we build our aluminium boats Fishing Boat Plans Aluminium Gas Gas Fishing Aluminium Boat Plans to refine the experience, making it smoother on and off the water, so your adventures are hassle-free and you can spend your time where Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas it matters.
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And the added strength in the aluminum boat is a plus. Another benefit might be more usable interior volume. They tend not to Fishing Boat Plans Aluminium Gas be so floppy, and bend more uniformly than flat bar. The downside is that extrusions cost more than flat bar or the sheet stock one can use to make flat bars, and may not be readily available at least in the size you want.

If working from stock Fishing Boat Plans Aluminium Gas plans for an aluminum boat, the designer probably specified certain sizes, types, and alloys of members for framing, etc.

But deviations may be possible. Most designs have some latitude in alternates that Free Aluminium Fishing Boat Plans Us can be substituted. Channels can be made from split square or rectangular tubing, or even split Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas pipe if somewhat larger than the specified channel. You could even fabricate your own sectional shapes from built-up flat bar.

Then too, if members are Fishing Boat Plans Aluminium Gas not available in one size, perhaps one the next size up will suffice. However, you should always consider the consequences of added weight that such a change might make. Conversely, it is probably better to avoid downsizing to a smaller member as the opposite alternative.

To the novice, there is a bewildering array of aluminum alloys available. But for the welded aluminum boat, the choices narrow down to the so-called marine alloys Fishing Boat Plans Aluminium Gas Fishing Boat Plans Gas Aluminium Fishing Boat Plans Aluminium Gas in the and series, the latter typically being extrusions.

Yet even within these series there are still many alternatives. But the most common, readily Fishing Boat Plans Aluminium Gas available, and suitable for welded boat hulls include: H32 H34 H H32 H H However, the designer may have already taken this into consideration if Fishing Boat Plans Aluminium Gas is specified. Corrosion resistance for the alloys listed above is excellent in all cases. The material has good corrosion resistance also and is commonly Fishing Boat Plans Aluminium Gas used for extruded shapes. Early aluminum boats were often made with closely-spaced transverse frames with few, if any, longitudinals, a carry-over from traditional wood Fishing Boat Plans Aluminium Gas boatbuilding no doubt.

However, the amount of welding required and the ultimate heat build-up caused considerable distortion and weakening of the skin. The more enlightened approach used today emphasizes longitudinal stiffeners fairly closely spaced with these crossing more-widely spaced transverse frames only as required to maintain hull shape.Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Aluminium Boat Fishing Plans Gas

In fact, some smaller welded aluminum boats may need few if any frames at all, especially where bulkheads may serve double duty.

The preferable approach Aluminium Gas Boat Fishing Plans is for transverse frames not to make contact with the shell plating other than perhaps at limited areas along the chine or keel.

About the only case where a transverse bulkhead needs to make continuous plating contact is if it is intended to be watertight.

Even then, such Fishing Boat Plans Aluminium Gas a practice tends to distort the plating and is often readily visible on the outside of the boat. In short, general practice is to Fishing Boat Plans Aluminium Gas NOT weld plating to transverse frames or bulkheads even if such members touch or come near the plating. The chine is the junction between Fishing Boat Plans Aluminium Gas the bottom and side on a v-bottom or flat bottom boat.

On high-speed planing boats, this corner should be as crisp are possible, especially in Plans Aluminium Boat Fishing Gas Boat Plans Gas Fishing Aluminium Fishing Boat Plans Aluminium Gas the aft half of the hull. The reason is that water should break free from the hull to reduce frictional drag at speed, and Fishing Boat Plans Aluminium Gas not climb up the topsides. As shown before, Fig. Otherwise, a Plywood Fishing Boat Plans Free 2020 backing member is largely optional.

If a special extrusion as discussed before is Fishing Boat Plans Aluminium Gas available, these are acceptable. Side and bottom plating fit into the slots which are then welded continuously. From an appearance standpoint, a continuous inside Fishing Boat Plans Aluminium Gas weld looks best. However, such extrusions are often proprietary items or otherwise prohibitive in cost, and a problem to buy and ship in small Fishing Boat Plans Aluminium Gas quantities.

Completing the ends of such extrusions where they join to transom and stem areas is also not always easy for the builder making a Fishing Boat Plans Aluminium Gas single boat. However, if the protruding flange is too pronounced, there may be a tendency to hang up on rocks in certain boats such Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas regard. In this case the bottom is fitted first and cut with care along the chine line a temporary backing member may aid in Fishing Boat Plans Aluminium Gas 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, Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas this configuration also takes care to assure fair lines. As mentioned, on the modern aluminum hull, most plating is reinforced by longitudinals. While a Fishing Boat Plans Aluminium Gas good set of plans will specify what to use for these members, this does not necessarily rule out another alternative if what is specified Fishing Boat Plans Aluminium Gas is not available.

These are available in many sizes, often in the form of extrusions with radiused edges that facilitate welding, or you can Fishing Boat Plans Aluminium Gas cut your own from plate. Other stiffeners are often extruded shapes that can get costly and may not be as readily available in the Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas of each cut. This allows a strong fillet weld on both sides of the junction the inside weld can be intermittent. A simple corner Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas junction here as in Fig. In fact, some builders extend the bottom plating considerably past the transom on faster planing hulls to form integral Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas via light plating and framing but with more of it , or with heavier plating using minimal but also somewhat huskier framing members. A boat Fishing Boat Plans Aluminium Gas 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, Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas has greater payload, and because it has less material, will cost less.

First, there is a natural tendency among builders in any material to Fishing Boat Plans Aluminium Gas Boat Aluminium Gas Fishing Plans 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 Plywood Fishing Boat Plans Free Quote 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 Fishing Boat Plans Aluminium Gas Boat Aluminium Fishing Plans Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas chance of heat buildup and ultimate hull plating distortion. Finally, special consideration must be given at the intersections of tank ends, hull stiffening members, Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas Gas Aluminium Fishing Boat Plans is sometimes shown as a function of tank capacity such as the following:.

To 50 Gals:. However, for practical purposes, most tanks should be Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas at least. Thicker tanks also require less stiffening, and since plating material is usually suitable, no special thinner stock need be ordered as might Fishing Boat Plans Aluminium Gas be implied from the above list. Also provide striker plates or doublers on the bottom under sounding tubes if being used to prevent damage Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas software to within exacting tolerances is a prerequisite. Otherwise, as they say, a miss can be as good as a mile. If one major Fishing Boat Plans Aluminium Gas 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 Fishing Boat Plans Aluminium Gas production builder, the higher design and development costs will be amortized over a great number of boats. And the labor savings would no doubt Fishing Boat Plans Aluminium Gas make up the investment manifold over time. This is the smallest of our Coastworker range that extends from just 25 ft to 58 ft Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas - An ideal first boatbuilding project.

Over built at last count - Our most popular small powerboat the you can build in your favorite material Fishing Boat Plans Aluminium Gas - Ideal as a small work or fishing boat and can make a great small family cruiser. Over 50 of his popular Trawler design Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas are in service world-wide. Over of his popular design are in service world-wide. Hundreds of this design have been built in many countries. This very popular Trawler has crossed major oceans and cruised world-wide. Features sail assisted economy cruising. Several of this popular design are in service world-wide.

This sailing trawler has crossed major oceans and cruised world-wide. Over of this popular design are in service world-wide.

This trawler is based on Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas a radius chine version of the Spray hull and makes the basis for either a family boat or rugged workboat that can be laid out to suit your particular requirements. Sail assist is another great feature of this design. This is an ideal Trawler design for those that prefer Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas wood epoxy construction methods. This very popular Trawler has been built in many countries and many examples are currently in service world-wide. This boat Fishing Boat Plans Aluminium Gas is also easy to build in fiberglass.

The fiberglass version features cheap mold construction methods as pioneered by Bruce Roberts. Remember us?? She sails Fishing Boat Plans Aluminium Gas like dream.

She is the fastest boat in the Abacos, Bahamas where we run our charter business. She has hit 12 knots She is stoutly rigged and heavily ballasted.

There will be two basic layouts - personal arrangements as shown plus an arrangement more suitable for charter use. The construction methods are very simple to use and suitable for any builder. Paul and Linda Jauncey and family made a successful Atlantic crossing in his self built steel Dutch style powerboat Dreamworld and at time of writing is currently undertaking a Pacific crossing.

When powering at hull speed Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas Fishing Boat Plans Aluminium Gas of 8. It is worth noting that by reducing speed to 7. By the end of the voyage Salvation 11 had called at ports, visited 51 countries including 34 states of the USA and motored just over , nautical miles in 7, hours at an average speed of 6. Shakedown cruise got a perfect This vessel performed beyond my wildest expectations. No ballast used.

Designers note: We recommend ballast in all our displacement trawlers.

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