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It is on on angle to allow the outboard to be trimmed. But first I had to match the cut outs in the centre rib to the curves of the chines and inwales- In the close up picture you can see the G Clamp holding a small steel bracket clamped to the chine for this Once everything was right and true I tied and clamped it so I could finally glue and screw the chines and inwales to the transom, centre rib and stem. The chines meeting the stem.
Note that I later cut a notch in bottom of the stem so the keel would fit nicely when it was put properly in place.. You can see pics of this in later steps. Once the basic shape was formed by the natural curves of the timber I carefully measured the locations for the other ribs about mm Centre to centre and measured each element of the rib to be made..
I then built and shaped each rib uniquely to its location and fitted it:- being careful to ensure that the boat remained symmetrical. At this point the keel had not been glued in it was clamped on.. To make the bottom sections of the ribs I made a cardboard template then used the frame itself to ensure I got the angles and the distances correct. It is three pieces of cardboard. One with a cut-out that matched the profile of the chine on the bottom of the picture and another matching the profile of the keel on the top.
I lined up each cut out and then stapled the pieces making a careful note of the angle of curve in the chines at that location�I then � transferred the template to my timber blank, marked the cuts and proceeded. Once the rib had been made only minor adjustments Sanding to the angles of the cuts were required.. After finishing the Boat Ramp Construction Gold Coast Korea ribs the keel was glued and screwed in pace.
Two heels- were installed on the keel one against the transom and another Davis Island Boat Ramp Construction Co Ltd against the stem. When everything was dry and stable I planed down the stem to meet the line of the boat. For the front-most rib I cut a curved piece of wood to go across the top to support some decking.. It is symmetrical.. I cut rebates into the bottom of the ribs about mm out from the keel.
I cut the rebate very carefully so the depth matched the thickness of the stringer to avoid too much fairing.. The stringers were then glued and screwed in.. Here is a drawing of what that looks like. Attached s a close up of the bottom, a chine, and a rib showing the fit.
The side panel has been done in this pic. I attached a 19mm wide vertical strip to the keel. The bottom planking butts up to this and the strip protrudes about 15mm. The strip was glued and screwed from the inside through the keel. It sat on the flat middle part of the keel left untouched by the fairing. See the centre rib drawing in the fairing section I also put in two seat rails 15mm x 20mm by notching out a step on the inner side of each rib and putting a small lug on each side ofthe transom to support them.
I also did a lot of sanding. You have fantastic access to all parts of the boat before it is planked so do as much as possible.. The detail of the attachment of the keel to the stem and how that is shaped can be seen. This was fun.. Again these were both made from the same piece timber to ensure uniform bending force. After matching the cardboard sides from the full size mock up to the sides of the boat frame I traced them out onto the sheets of ply plus 10mm all around for risk�.
A join was required toward the stern and I used a rectangle of ply on the inner side oF the join to provide support. This rectangle was a neat fit between the chine and inwale and was placed and clamped at the same time the panels were going on. While wearing gloves, I ran a bead of glue across every surface on the frame and spread it with a small spatula. Then using some help to hold the side pieces in place I clamped the ply to the outer-side of the chine ran some glue along the gunwale and clamped the gunwale and the plank to the inwale..
I used a clamp every mm. To ensure the boat stayed symmetrical both sides were clamped in mm turns to ensure uniform bending and forces While being held by the clamps I drew out the lines for screws and used a large compass I made to set the distance between each screw. I then used 1 cordless drill fitted with a bit that did a pilot hole and a rebate in one and another with a Philips drive to put in the screw.
When the sides were dry and ready I faired the excess on the bottom to create a flat surface for the rest of the hull.. Three short ones at the front and one larger piece for the rest. Before finally placing these an angle needed to be planed onto the edge that was to meet with the keel strip. The front pieces were fiddly so I did these first..
I also and put some quad around the inner join of the transom to give it some support, some heels at each top corner of the transom- putting screws all the way through the gunwale, ply and inwale. This pic with my kids shows the position of the centre rib. It looks like it is toward the front.. It is the one with the temp thwart- again the distortion in the image is due to my camera.
Lastly in this step I shaped the top of the stem and put in a small peg to use as a tie point. I cut two basic seats to be placed on the rail. The middle seat had a support that went from the chine to the seat. Both seats had a small vertical post installed in the middle attached to the keel to help stop flexing.
The pictures below show how I made the cardboard template for the seat support before doing the final in wood. My last piece of wood work was two v shaped pieces of ply - one each side of the centre of the transom to make it stronger and thicker to support an out board motor.
I had to cut it so it went around the heel between the keel and transom. All the screw countersinks etc we plugged with epoxy. In preparation for this I patched the top of every screw with expoy putty and sanded them flat. I patched and sanded everything I could With the boat upside down.. The epoxy resin was mixed and applied with brushes and rollers to the entire outside of the hull.
It took about 20 min to get all of the glass saturated until transparent. The resin started to go off after about 30 min. By the next morning it was hard.. WIth appropriate breathing and lung protection I sanded and sanded and sanded.. Inside and out.. I applied a couple of coats for white exterior house paint as an undercoat and kept on sanding, mostly by hand and with an orbital sander.. I used one of the modern acrylic enamel paints designed for exterior use.
The forces which parts of a machine are subjected to can vary significantly and can do so at a great rate. The forces which a boat or aircraft are subjected to vary enormously and will do so thousands of times over the structure's lifetime. The structural design must ensure that such structures can endure such loading for their entire design life without failing.
Aerospace structures typically consist of thin plates with stiffeners for the external surfaces, bulkheads, and frames to support the shape and fasteners such as welds, rivets, screws, and bolts to hold the components together.
A nanostructure is an object of intermediate size between molecular and microscopic micrometer-sized structures. In describing nanostructures it is necessary to differentiate between the number of dimensions on the nanoscale.
Nanotextured surfaces have one dimension on the nanoscale, i. Nanotubes have two dimensions on the nanoscale, i. Finally, spherical nanoparticles have three dimensions on the nanoscale, i. The terms nanoparticles and ultrafine particles UFP often are used synonymously although UFP can reach into the micrometer range. The term 'nanostructure' is often used when referring to magnetic technology. Medical equipment also known as armamentarium is designed to aid in the diagnosis, monitoring or treatment of medical conditions.
There are several basic types: diagnostic equipment includes medical imaging machines, used to aid in diagnosis; equipment includes infusion pumps, medical lasers, and LASIK surgical machines ; medical monitors allow medical staff to measure a patient's medical state. Monitors may measure patient vital signs and other parameters including ECG , EEG , blood pressure, and dissolved gases in the blood; diagnostic medical equipment may also be used in the home for certain purposes, e.
A biomedical equipment technician BMET is a vital component of the healthcare delivery system. Employed primarily by hospitals, BMETs are the people responsible for maintaining a facility's medical equipment.
Columns are elements that carry only axial force compression or both axial force and bending which is technically called a beam-column but practically, just a column. The design of a column must check the axial capacity of the element and the buckling capacity. The buckling capacity is the capacity of the element to withstand the propensity to buckle.
Its capacity depends upon its geometry, material, and the effective length of the column, which depends upon the restraint conditions at the top and bottom of the column. The capacity of a column to carry axial load depends on the degree of bending it is subjected to, and vice versa.
This is represented on an interaction chart and is a complex non-linear relationship. A beam may be defined as an element in which one dimension is much greater than the other two and the applied loads are usually normal to the main axis of the element. Beams and columns are called line elements and are often represented by simple lines in structural modeling. Beams are elements that carry pure bending only.
Bending causes one part of the section of a beam divided along its length to go into compression and the other part into tension. The compression part must be designed to resist buckling and crushing, while the tension part must be able to adequately resist the tension. A truss is a structure comprising members and connection points or nodes. When members are connected at nodes and forces are applied at nodes members can act in tension or compression. Members acting in compression are referred to as compression members or struts while members acting in tension are referred to as tension members or ties.
Most trusses use gusset plates to connect intersecting elements. Gusset plates are relatively flexible and unable to transfer bending moments. The connection is usually arranged so that the lines of force in the members are coincident at the joint thus allowing the truss members to act in pure tension or compression. Trusses are usually used in large-span structures, where it would be uneconomical to use solid beams.
Plates carry bending in two directions. A concrete flat slab is an example of a plate. Plates are understood by using continuum mechanics , but due to the complexity involved they are most often designed using a codified empirical approach, or computer analysis. They can also be designed with yield line theory, where an assumed collapse mechanism is analyzed to give an upper bound on the collapse load.
This technique is used in practice [8] but because the method provides an upper-bound, i. Shells derive their strength from their form and carry forces in compression in two directions. A dome is an example of a shell. They can be designed by making a hanging-chain model, which will act as a catenary in pure tension and inverting the form to achieve pure compression.
Arches carry forces in compression in one direction only, which is why it is appropriate to build arches out of masonry. They are designed by ensuring that the line of thrust of the force remains within the depth of the arch. It is mainly used to increase the bountifulness of any structure. Catenaries derive their strength from their form and carry transverse forces in pure tension by deflecting just as a tightrope will sag when someone walks on it.
They are almost always cable or fabric structures. A fabric structure acts as a catenary in two directions. Structural engineering depends on the knowledge of materials and their properties, in order to understand how different materials support and resist loads.
It also involves a knowledge of Corrosion engineering to avoid for example galvanic coupling of dissimilar materials. From Wikipedia, the free encyclopedia. Sub-discipline of civil engineering dealing with the creation of man made structures. This article includes a list of general references , but it remains largely unverified because it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. February Learn how and when to remove this template message.
Main article: History of structural engineering. Slightly smaller than the Spray 40 this was a custom design for a client who had particular requirements - check it out as it may suit you too! With over completed at last count, the Spray 40 along with her smaller sisters, the Spray 40 is one of our all time most popular designs. Many S40's have completed complete circumnavigations - proof that this is one great sailboat that you can build in your favourite building material.
Another version of the Spray 40, this was a custom design for a client who had particular requirements - check it out as it may suit you too! Another of our earliest designs that has retained its popularity with many being built over the past 25 years. This larger sister to the popular PCF 40 Trawler, has crossed major oceans and cruised world-wide.
Over completed and in service world-wide this saiboat was designed for those that prefer the full round bilge hull form, the Centennial Sprays have found favor with those who want to build in either round bilge steel, aluminum or wood epoxy. Designed for those that prefer to build in wood epoxy, this sailboat has found may admirers and examples can be found in many countries where the owners are duly proud of this fine sailboat.
Another of our earlier designs that has retained its popularity with many being built over the past 20 years. This design features a modern un-broken sheerline with a deck salon a feature of this boat. The design features a modern long keel configeration that is popular with many of our builders. One of our larger than Sprays that has already been built in considerable numbers.
Originally this was a custom design for a client who had particular requirements - check it out as it may suit you too! The first example of this popular design was built in Siberia Russia, since then many other examples have been built in many areas of Bass Boat Construction Plans Guide the world. With a wide variety of possible building materials the Roberts 58 goes from strength to strength. Designed for those that prefer to build in wood epoxy, this sailboat has found may admirers and examples can be found in many countries.
One of our most recent designs this sailboat started life as a custom design but is sure to find many admirers for years to come. Well worth your consideration if you are looking for a modern aluminum sailboat that you can build from our very detailed plans and patterns.
This is one of our most 'famous' designs - read all about this great sailboat that you can build for yourself! There will be two basic layouts - personal arrangements as shown plus an arrangement more suitable for charter use. Already a well proven design the Euro Cat is a great family cruising Cat.
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