1. INTRODUCTION
The focus of this paper is to outline the final year dissertation for the BEng Yacht and Powercraft Design course at Southampton Solent University. The proposed focus of this dissertation is an investigation into the development of foils for the Multi50 class of offshore racing trimarans. The Multi50 class has been a cost-effective option in the world of high-performance offshore multihull racing, drawing the attention of smaller independent teams and larger professional teams alike. The Multi50 class rules limit the boats with a box rule and air draft and have previously disallowed the use of lift-generating foils. With many of the extremely high-performance yachts, and the media, exploring the use of foils, the Multi50 class …show more content…
Other offshore multihull classes including the MOD70 and ORMA classes have already made considerable strides in foil design. Due to the operating cost associated with these larger multihulls, the Multi50 is an ideal test bed for development. With the rule change, new boats and old boats will be testing foils and making changes to their platform. One of the major areas of concern for these teams will be the ability of the structure to cope with the loads of foils. Lift generating foils must be designed to support the entire weight of the boat as well as be able to withstand the shock of the hull inevitably coming down off the foils during maneuvers, wind shifts or operator error. The structure of a trimaran, especially a racing trimaran, is a complex equation with many variables and is constantly being tested as the boat races in all conditions. The design of these foils and structure will be a focus of this …show more content…
With a limited class size and relatively closely guarded details, interpolating data from similar classes such as the ORMA 60 or MOD70, may be required. A major component of this stage will be to determine the spacing of the hulls to limit negative interactions. This can be completed by comparing hypothetical resistance data and predicted speeds from WinVPP based on different hull spacing. With this completed, the rig plan and appendages can be placed and compared against existing data from the class. Sailing equilibrium calculations will be used here to develop the requirements for the foils and ensure the stability of the platform in offshore conditions. Designing the foils will begin with research on similar foils and testing with ANSYS. The foil design will determine the loads which will be used to engineer the structure. With the loading developed and the loads of the foils established, the final stage will be to refine the overall structure with all of the loads
The focus of this paper is to outline the final year dissertation for the BEng Yacht and Powercraft Design course at Southampton Solent University. The proposed focus of this dissertation is an investigation into the development of foils for the Multi50 class of offshore racing trimarans. The Multi50 class has been a cost-effective option in the world of high-performance offshore multihull racing, drawing the attention of smaller independent teams and larger professional teams alike. The Multi50 class rules limit the boats with a box rule and air draft and have previously disallowed the use of lift-generating foils. With many of the extremely high-performance yachts, and the media, exploring the use of foils, the Multi50 class …show more content…
Other offshore multihull classes including the MOD70 and ORMA classes have already made considerable strides in foil design. Due to the operating cost associated with these larger multihulls, the Multi50 is an ideal test bed for development. With the rule change, new boats and old boats will be testing foils and making changes to their platform. One of the major areas of concern for these teams will be the ability of the structure to cope with the loads of foils. Lift generating foils must be designed to support the entire weight of the boat as well as be able to withstand the shock of the hull inevitably coming down off the foils during maneuvers, wind shifts or operator error. The structure of a trimaran, especially a racing trimaran, is a complex equation with many variables and is constantly being tested as the boat races in all conditions. The design of these foils and structure will be a focus of this …show more content…
With a limited class size and relatively closely guarded details, interpolating data from similar classes such as the ORMA 60 or MOD70, may be required. A major component of this stage will be to determine the spacing of the hulls to limit negative interactions. This can be completed by comparing hypothetical resistance data and predicted speeds from WinVPP based on different hull spacing. With this completed, the rig plan and appendages can be placed and compared against existing data from the class. Sailing equilibrium calculations will be used here to develop the requirements for the foils and ensure the stability of the platform in offshore conditions. Designing the foils will begin with research on similar foils and testing with ANSYS. The foil design will determine the loads which will be used to engineer the structure. With the loading developed and the loads of the foils established, the final stage will be to refine the overall structure with all of the loads