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Steel is an excellent boatbuilding material, proven in use worldwide. Aluminum dinghy plans, due to the relatively high weight compared to other boatbuilding materials, and the care required in the akuminum stage with regard to hull development, structural integrity, stability, and balance, the plans used to build a steel boat should be intended specifically for use with this material.

Using plans for a design intended for some other material and converting it to steel should not be done, at least without careful and usually costly! For the amateur boatbuilder who has knowledge of aluminum dinghy plans weld types and welding sequences, together with the necessary electric dinghj gas welding skills, steel aluminum dinghy plans an ideal material.

On a cost-per-square-foot basis, steel is probably aluminum dinghy plans cheapest of all boatbuilding materials. Construction is simple when using the building methods specified in GLEN-L plans, plajs faster than just about any other boatbuilding material. No special shelters or structures are required, and the materials are readily available just about anywhere without special order.

For strength, steel is aluminum dinghy plans about tops in all respects. Repairs and modifications can aluminum dinghy plans easily made anywhere in the world as long as a welding set is available.

Numerous welding schools and classes are available in most areas, either through public school systems or through private trade schools. As for applying these skills to steel boatbuilding, there are several texts on steel boatbuilding, which we highly recommend to all steel boatbuilders.

This general instruction manual discusses the various building procedures and options for aluminum dinghy plans up, proper hull assembly sequence, welding recommendations, tank construction, insulating methods and materials, joinerywork, electrical, finishing, and much. Full size patterns mean even faster construction since no lofting is necessary.

For those who desire p,ans loft their boats, however, a Table of Offsets is also provided. They cover all aspects of the design including structural views and sections, scantlings, cabin construction, joinery arrangements, tank configurations, engine placements, rudders and underwater fittings, and spars on sailboat designs. In short, you get everything you alukinum in the way of information to build your aluminum dinghy plans own steel boat, and at a low price!

Steel is usually sold in quantity by weight. Simply use this figure times the cost of steel per pound in your area to arrive at a reasonable estimate for hull material costs.

Aluminum is also a superb material for boatbuilding by the aluminum dinghy plans qualified in aluminum welding. Aluminum boats using welded marine alloy construction are strong, lightweight, durable, and easy to maintain. As with steel, the dibghy should be specifically intended for this material.

Plans listed for aluminum construction include all aluminum dinghy plans details necessary to build the boat in sheet aluminum.

See our Online Store for additional publications on aluminum aluminum dinghy plans. Please see our Online Store for all the Glen-L designs available for aluminum construction. The following can be used as a general guideline for selecting materials.

However, the listing is not necessarily all encompassing nor given in order of preference. To figure hull cost, use weight of hull times cost per pound. For further information on welding, alumibum WeldingTipsandTricks. The number of people with aluminum welding skills and access dibghy fabricating equipment has increased considerably over the years.

Yet many are unaware of fundamental considerations confronting the short-handed amateur building a single boat for his own account. The would-be dingyy aluminum boatbuilder already familiar with aluminum often has his roots in a non-marine production fabrication setting. Thus there may be a tendency to want aluminum dinghy plans apply mass-production techniques to the construction of just a single boat.

But building a single boat yourself is considerably different from one built on a production line, and thus may require certain adjustments and even a revised mind set on the part of the builder. First, there is no one, aluminum dinghy plans way to finghy an aluminum boat.

In fact, there can be many suitable approaches and variations. Consider the following. Because production builders are always thinking up ways to cut labor and material costs, aluminum dinghy plans time required aluminum dinghy plans build aluminum dinghy plans, they evolve aluminum dinghy plans methods and materials that help toward these ends even if there is not necessarily any improvement in the boat.

For example, they may use special proprietary extrusions to expedite some assembly process such as joining side and bottom plating at the chine see Fig. Aluminum dinghy plans, your chines might then be backed with a almuinum round bar Fig. None of these methods is necessarily superior, but just different due to circumstances.

Also, production builders often make up sophisticated re-usable production jigs over which pre-cut hull panels are assembled and welded. These jigs may also rotate to facilitate high-speed welding, with internal members added after the hull is removed from the jig. In either case, end results are much the same and with comparable boat quality. Using a frame substructure for setting up your hull has several advantages for the do-it-yourselfer typically working.

First the frame substructure makes it easy to assure hull accuracy that is so important to ultimate performance in a powerboat. Factory production boatbuilders often use specialized forming equipment not alumibum available to amateurs, or use forming services that might be provided by metal suppliers when quantity requirements are high.

Conversely, a design for the do-it-yourself builder would more likely specify internal longitudinal stiffeners i. Either method gets the job done but the latter is easier and cheaper for most building their own boats.

First, a disclaimer. But in reality few do-it-yourselfers want to pay the price for the service. But steel is considerably heavier than aluminum, so boats designed for steel dnighy usually designed for greater displacement. The consequences for a semi- or full-planing powerboat might be so much the better since the lighter aluminum boat will dinvhy less power and fuel.

But in converting slower displacement-type powerboats from steel to aluminum, you might need to add ballast into such a boat done in aluminum to bring it back down to its aluminum dinghy plans lines.

This may place the center of gravity too far below that of einghy steel brethren and result a snappy, jerky motion. So instead, you may want to place some of the added weight higher up. Aluminum is aluminum dinghy plans as strong as steel so some compensations aluminum dinghy plans be made if using it in alumnum of steel.

Without getting too technical, with aluminum used for shell plating e. Dinggy another way, to alumibum the same strength as steel in an aluminum hull, it needs to be approximately half the weight almuinum steel. More important is how the two perform under repeated fatigue loading stress cycles alternating between tension and compression. Tests show that for a similar number of cycles, aaluminum stays above its yield strength threshold.

In other dibghy, it is more likely to fail due to fatigue over time, an important consideration for boats subject to such conditions i. But by how much? Converting from steel to aluminum is fairly straight-forward mainly because the members used are much the same in configuration and the aluminjm of design and construction are similar.

And while there are standards-making organizations e. Consider plating thickness. On the steel boat, this is more often based on the practical minimum necessary to ward aluminum dinghy plans corrosion over time, provide decent welds, and a thickness adequate to minimize unsightly deformation.

Aluminum dinghy plans 10GA. And in most cases this increase applies mostly dinhgy thickness alone as is listed in Fig. An operating premise is that aluminum dinghy plans boats in the size range discussed are almost dingjy stronger than is necessary; aluminu due to the nature of the material, for reasons previously noted, and the fact that the shape of most boats adds strength in and of itself, and often where aluminum dinghy plans does the most good such as in the bow.

So using the pllans, 10GA. In other words, multiply the planns of the steel member by a factor of from 1. Tip: Start with 1. The point is, many alternatives can be used to build an aluminum boat with largely the same results in terms aluminum dinghy plans strength, durability. In the above and referring to Fig. First, the extra strength that a shaped member would provide in the steel boat is simply redundant in the size boats discussed; it would just add weight, cost, and complexity.

Second, shaped members add to the difficulties aluminum dinghy plans inspection, maintenance, and corrosion protection in the steel boat; for example, the ability dingny see and coat the underside flanges is difficult, especially when such members are small. However, in the aluminum boat in Fig. But there are several reasons for using shaped members, especially for longitudinal p,ans.

First, such members are stronger. Or put another way, you could have the same strength in a lower-profiled shape aluminum dinghy plans with flat bar. And the added strength in the aluminum boat is a plus. Another benefit might be more usable interior volume. They tend not to 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 plaans use to make flat bars, and aluminum dinghy plans plan be readily dinghyy at least in the size you want.

If working from stock plans for an aluminum boat, pans designer probably specified certain sizes, types, and alloys of members for framing. But deviations may be possible. Most designs have some latitude in alternates that can be substituted. Channels can be made from split square or rectangular tubing, or even split 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 not available in one size, perhaps one the next size up will suffice. However, you should always consider the consequences dingny added weight that such a change might make.

Conversely, it is probably better to avoid downsizing to a smaller member as aluminum dinghy plans opposite alternative. To the novice, aluminum dinghy plans is a bewildering array of aluminum alloys available. Aluminum dinghy plans for the welded aluminum boat, the choices narrow down to the aluminum dinghy plans marine alloys in the and series, the latter typically being extrusions.

Yet even aluminum dinghy plans these series there are still many alternatives. But the most common, readily alumiunm, and suitable for welded boat hulls include: H32 H34 H H32 H H However, the designer may have already taken this into consideration if is specified. Corrosion resistance for the alloys listed above is excellent in all cases. The material has good corrosion resistance also and is commonly used for extruded shapes.

Main point:

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10 rows�� Home / Boat Plans & Kits Catalog / Aluminum Construction: Designs for Aluminum Construction. All SPECMAR welded aluminum hulls have been specifically designed for welded aluminum construction and computer guided cutting. Each design is intended to speed production, improve accuracy, and minimize both shop time and man-hours. Detailed assembly drawings and written assembly instructions are provided with each design. We can provide the needed CAD data to an .

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1. EMOS writes:
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2. Olmez_Sevgimiz writes:
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