Schwetz design specialise in the design of recreational vessels. Every vessel is designed to comply with the relevant Australian Standards such AS4132, Boat and Ship Design and Construction and AS1799-2009, Small Craft Code. These codes provide guidelines for structural design, stability, power capacity and the passenger capacity including the volume of internal foam buoyancy required. We also provide all the information required for the boat builder to complete the builders plate. We have been involved in some novel designs including aluminium steam powered paddle steamers.
Schwetz Design specialise in the design of commercial vessels. The majority of commercial vessels operating in Australia are now designed to comply with the new NSCV code. The code lists specific requirements for structural design, lifesaving appliances, vessel stability and general layout requirements. All drawings are reviewed and approved by the relevant government authorities before construction.

Vessels operating internationally are usually designed to meet the requirements of an international survey authority such as Det Norkse Veritas (DNV), Germanisher Lloyds (GL), Bureau Veritas (BV)

Surface modeling is a fundamental part of hull design. With our surface modeling skills we are able to model complex shapes and forms such as jet ducts, outboard motors and aircraft, and flat pattern a set of developable parts that can be used by a skilled tradesman to build the item. We used world leading software including Maxsurf, Rhino and Catia.
Structural Design and drafting is an important part of ship and boat design. Our in house design systems allow us to optimise any structure to suit a particular design loading condition. Often this will utilise finite element analysis to remove additional material and weight. The results of which are presented in a set of drawings detailing specific requirements.
Engineering Design and Drafting is another important part of Ship and Boat Design. Engineering systems include engine installation, shafting and powering, fluid systems such as fire systems, fuel, bilge, freshwater, and toilet systems and environmental systems such as heating and ventilation (HVAC). The drawing shown here details a bi folding bow door from one of our landing craft.
Computational Fluid Dynamics (CFD) is a computer software tool used by Naval Architects to compare the performance of various hull design versions for the same vessel, allowing the designers the ability to create an optimum hull form for each application. The image here shows the low wake generated from one of our catamaran ferries.
To accurately predict the performance of a new design a scaled version of the hull can be built and towed for about 300m in a towing tank. The scale models are usually about 2m long. Transducers are used to measure the forces and accelerations, and the results of the testing program can then be used to help predict the performance of the new vessel.
Finite Element Analysis (FEA) is a computer software tool used by engineers to model and predict the stresses, deflections and strength of structures. For complex structures, such as large ferry, of even the bridge/walkway pictured here, FEA can reveal how the structure will perform and respond as a whole once the loading is applied. The area shown in pink shows the location of greatest deflection, in this case being 2mm.



We specialise in the design of fire sprinkler and drencher systems onboard HSC2000 Ferries, which must comply with IMO resolution MSC.44(65).

Most pumping systems can be modeled and solved quite simply, the flow rate from the pump is simply expelled at the end of the discharge pipe, however a piping network system can be very complicated to solve. Schwetz Design have developed software in house utilising the Newton-Raphson method. The system is modelled as a set of elements connected together by nodes. Each element element is defined by an inlet node, an outlet node and an equation defining the pressure/flow characteristics particular to that element. A set of simultaneous equations is then assembled and solved using matrix algebra, revealing the discharge pressure and flowrates though each sprinkler nozzle.

Schwetz Design are available to independently manage any new build project. Our services includes producing the build schedule and monitoring the build progress. A weekly report is provided to the client following weekly meetings with the boat builder
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