The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passen... more The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passenger-only catamaran ferries with a length greater than 40 metres are presented and discussed, together with 2 other modeltested hull forms, covering both resistance and ship motions. Comment is made on the actual performance on trials when compared against the tank test results, together with the results from various numerical prediction methods. The hull forms include round-bilge, soft-chine and hard-chine shapes, representing semi-displacement hulls and Semi-SWATH hulls, and includes the effects of motion control devices. The effect of bulbous bows and transom sterns is discussed. The hull forms cover a range of speeds up to a Froude number of 1.2. Although not a systematic series, the trends resulting from variations in hull shape and characteristics are evident.
A substantial amount has been learned from the design, manufacture and operation of a 127-metre l... more A substantial amount has been learned from the design, manufacture and operation of a 127-metre length Trimaran RoPax vessel as well as a similar hull configured as a warship now in service with the US Navy. The trimaran hull shape and layout are carefully designed to work in conjunction with underwater foils in order to maximise passenger and crew comfort, and for the design of the next generation of high-speed trimaran it was decided to develop a new ride control system specifically to suit the characteristics of trimaran motions, which were found to be generally longer and slower than catamarans. Various systems and controlling software were analysed in a numerical simulator, and fullyarticulated T-foils were developed to best suit the new design. These were designed and manufactured in-house at the same time as a 40-knot 102-metre length trimaran was being constructed. New controlling software was also developed to suit the long-period motions of the vessel. Extensive trials have proven the success of the system with some noticeable improvements over the performance of the first vessel. NOMENCLATURE GM T Transverse Metacentric Height LCS Littoral Combat Ship (US Navy) KG Vertical Centre of Gravity above base MSI Motion Sickness Index [3] 1.
CFD analysis has been conducted on a 100m catamaran hull shape with various bow thruster position... more CFD analysis has been conducted on a 100m catamaran hull shape with various bow thruster positions in order to develop an understanding of the effects and losses that are generated from situating thrusters near the hull as well as the effect of having a hull downstream of the thruster. Various thruster angles, hull separations, and vertical heights were investigated to determine their influence on thruster losses. NOMENCLATURE T Effective thrust T 0 Maximum thrust X Distance between thrusters D Thruster diameter 1.
The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passen... more The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passenger-only catamaran ferries with a length greater than 40 metres are presented and discussed, together with 2 other modeltested hull forms, covering both resistance and ship motions. Comment is made on the actual performance on trials when compared against the tank test results, together with the results from various numerical prediction methods. The hull forms include round-bilge, soft-chine and hard-chine shapes, representing semi-displacement hulls and Semi-SWATH hulls, and includes the effects of motion control devices. The effect of bulbous bows and transom sterns is discussed. The hull forms cover a range of speeds up to a Froude number of 1.2. Although not a systematic series, the trends resulting from variations in hull shape and characteristics are evident.
Walking the streets in many developing countries leaves many Westerners with a sense of desperati... more Walking the streets in many developing countries leaves many Westerners with a sense of desperation to help to somehow improve the lives of the people they witness. This combined with the seemingly excessive wealth from home has led many people to start organisation, fundraisers, or just individual actions to help those in need. Child sponsorship (CS) has been a focus of this type of idea, because “I learnt that I can change someone's life with the cost of two cups of coffee per week. I would drink less coffee for myself to give my sponsored child a life-changing opportunity.” ((Good Neighbours, no date)
Large CS organizations in the majority have grown and matured from the early days of direct cash to children and families to more holistic community development focuses, but there are many smaller CS that have not undertaken this transition. Let’s do Something Now (LDSN) is a small American registered Not for Profit raising funds through CS programs for children in Rwanda and is currently in the process of wanting to transition from an individual CS organisation to something more holistic. This transitional process allows for a great opportunity to study the process and develop a potential path forward for the organisation.
There has been some research and publications on how large NGO’s have transitioned from direct CS to community development work, the process for small NGO’s is less well documented “It should be noted that while many of the larger CS INGOs have transitioned to community development utilising sponsorship as a fundraiser, the extent to which smaller CS organisations should, or can follow, poses interesting dilemmas.” (Pierce and Kalaiselvi, 2014) With LDSN looking to move and transition from the direct CS model to something else this research will help fill the void and answer some of the dilemmas spoken about by Pierece and Kalaiselvi.
Much has been written and debated on the success or otherwise of CS, but that is not the topic or aim of this paper.
The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passen... more The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passenger-only catamaran ferries with a length greater than 40 metres are presented and discussed, together with 2 other modeltested hull forms, covering both resistance and ship motions. Comment is made on the actual performance on trials when compared against the tank test results, together with the results from various numerical prediction methods. The hull forms include round-bilge, soft-chine and hard-chine shapes, representing semi-displacement hulls and Semi-SWATH hulls, and includes the effects of motion control devices. The effect of bulbous bows and transom sterns is discussed. The hull forms cover a range of speeds up to a Froude number of 1.2. Although not a systematic series, the trends resulting from variations in hull shape and characteristics are evident.
A substantial amount has been learned from the design, manufacture and operation of a 127-metre l... more A substantial amount has been learned from the design, manufacture and operation of a 127-metre length Trimaran RoPax vessel as well as a similar hull configured as a warship now in service with the US Navy. The trimaran hull shape and layout are carefully designed to work in conjunction with underwater foils in order to maximise passenger and crew comfort, and for the design of the next generation of high-speed trimaran it was decided to develop a new ride control system specifically to suit the characteristics of trimaran motions, which were found to be generally longer and slower than catamarans. Various systems and controlling software were analysed in a numerical simulator, and fullyarticulated T-foils were developed to best suit the new design. These were designed and manufactured in-house at the same time as a 40-knot 102-metre length trimaran was being constructed. New controlling software was also developed to suit the long-period motions of the vessel. Extensive trials have proven the success of the system with some noticeable improvements over the performance of the first vessel. NOMENCLATURE GM T Transverse Metacentric Height LCS Littoral Combat Ship (US Navy) KG Vertical Centre of Gravity above base MSI Motion Sickness Index [3] 1.
CFD analysis has been conducted on a 100m catamaran hull shape with various bow thruster position... more CFD analysis has been conducted on a 100m catamaran hull shape with various bow thruster positions in order to develop an understanding of the effects and losses that are generated from situating thrusters near the hull as well as the effect of having a hull downstream of the thruster. Various thruster angles, hull separations, and vertical heights were investigated to determine their influence on thruster losses. NOMENCLATURE T Effective thrust T 0 Maximum thrust X Distance between thrusters D Thruster diameter 1.
The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passen... more The hydrodynamic characteristics of twelve hull forms of existing high-speed vehicular and passenger-only catamaran ferries with a length greater than 40 metres are presented and discussed, together with 2 other modeltested hull forms, covering both resistance and ship motions. Comment is made on the actual performance on trials when compared against the tank test results, together with the results from various numerical prediction methods. The hull forms include round-bilge, soft-chine and hard-chine shapes, representing semi-displacement hulls and Semi-SWATH hulls, and includes the effects of motion control devices. The effect of bulbous bows and transom sterns is discussed. The hull forms cover a range of speeds up to a Froude number of 1.2. Although not a systematic series, the trends resulting from variations in hull shape and characteristics are evident.
Walking the streets in many developing countries leaves many Westerners with a sense of desperati... more Walking the streets in many developing countries leaves many Westerners with a sense of desperation to help to somehow improve the lives of the people they witness. This combined with the seemingly excessive wealth from home has led many people to start organisation, fundraisers, or just individual actions to help those in need. Child sponsorship (CS) has been a focus of this type of idea, because “I learnt that I can change someone's life with the cost of two cups of coffee per week. I would drink less coffee for myself to give my sponsored child a life-changing opportunity.” ((Good Neighbours, no date)
Large CS organizations in the majority have grown and matured from the early days of direct cash to children and families to more holistic community development focuses, but there are many smaller CS that have not undertaken this transition. Let’s do Something Now (LDSN) is a small American registered Not for Profit raising funds through CS programs for children in Rwanda and is currently in the process of wanting to transition from an individual CS organisation to something more holistic. This transitional process allows for a great opportunity to study the process and develop a potential path forward for the organisation.
There has been some research and publications on how large NGO’s have transitioned from direct CS to community development work, the process for small NGO’s is less well documented “It should be noted that while many of the larger CS INGOs have transitioned to community development utilising sponsorship as a fundraiser, the extent to which smaller CS organisations should, or can follow, poses interesting dilemmas.” (Pierce and Kalaiselvi, 2014) With LDSN looking to move and transition from the direct CS model to something else this research will help fill the void and answer some of the dilemmas spoken about by Pierece and Kalaiselvi.
Much has been written and debated on the success or otherwise of CS, but that is not the topic or aim of this paper.
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coffee for myself to give my sponsored child a life-changing opportunity.” ((Good Neighbours, no date)
Large CS organizations in the majority have grown and matured from the early days of direct cash to children and families to more holistic community development focuses, but there are many smaller CS that have not undertaken this transition. Let’s do Something Now (LDSN) is a small American registered Not for Profit raising funds through CS programs for children in Rwanda and is currently in the process of wanting to transition from an individual CS organisation to something more holistic. This transitional process allows for a great opportunity to study the process and develop a potential path forward for the organisation.
There has been some research and publications on how large NGO’s have transitioned from direct CS to community development work, the process for small NGO’s is less well documented “It should be noted that while many of the larger CS INGOs have transitioned to community development utilising sponsorship as a fundraiser, the extent to which smaller CS organisations should, or can follow, poses interesting dilemmas.” (Pierce and Kalaiselvi, 2014) With LDSN looking to move and transition from the direct CS model to something else this research will help fill the void and answer some of the
dilemmas spoken about by Pierece and Kalaiselvi.
Much has been written and debated on the success or otherwise of CS, but that is not the topic or aim of this paper.
coffee for myself to give my sponsored child a life-changing opportunity.” ((Good Neighbours, no date)
Large CS organizations in the majority have grown and matured from the early days of direct cash to children and families to more holistic community development focuses, but there are many smaller CS that have not undertaken this transition. Let’s do Something Now (LDSN) is a small American registered Not for Profit raising funds through CS programs for children in Rwanda and is currently in the process of wanting to transition from an individual CS organisation to something more holistic. This transitional process allows for a great opportunity to study the process and develop a potential path forward for the organisation.
There has been some research and publications on how large NGO’s have transitioned from direct CS to community development work, the process for small NGO’s is less well documented “It should be noted that while many of the larger CS INGOs have transitioned to community development utilising sponsorship as a fundraiser, the extent to which smaller CS organisations should, or can follow, poses interesting dilemmas.” (Pierce and Kalaiselvi, 2014) With LDSN looking to move and transition from the direct CS model to something else this research will help fill the void and answer some of the
dilemmas spoken about by Pierece and Kalaiselvi.
Much has been written and debated on the success or otherwise of CS, but that is not the topic or aim of this paper.