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• W85725101 abstract "The aim of the thesis was to design a test rig capable of accurately determining the forces produced by the water on a rowing oar blade under controlled conditions. The design is to be able to test the forces on the oar blade under the full variation of blade angles of attack and to cater for many different blade shapes. Other aim was to keep within a very limited budget (approx $200) for the construction and testing of the rig. The limitation of the budget dominated the design process and added many other restrictions on the final design of the test rig.The use of drag and lift theory for the design of oar blades is common within the rowing community, however there is no scientific prove that this design philosophy is the best approach. The next step was to investigate a method for testing the blade to determine an accurate force value and therefore improve the efficiency of the blade.Upon review of the previous design attempt and the paper presented by Caplan (2005) on testing a scale model, it was determined a simple mechanism that pushes the blade through the water in an arc would be sufficient to get the required data. The path of the oar blade through the water is complex and difficult to replicate in a static test environment, therefore breaking the oar blade movement down and determining forces at set velocities and angles of attack was determined to be a better method than the previous test rig design. The use of a scale model by Caplan does not allow for the variation in the Froude number when considering the flow characteristics. As it is not accurate to scale the Froude number it was therefore decided to make the test rig capable of pushing a full size blade.The test rig has been designed to use available scrap materials found within the Mechanical Engineering department of the University of Queensland. Many of the components and parts within the rig are to suit the available scrap and are not the optimal design for the test rig. Components of the design are in some instances well above the required strength and stress limits while other components are just able to meet the requirements. The design of the rig took many trial designs before settling on the current model. The use of strain gauges by Caplan to determine the forces is the best and most accurate method, however due to the budget limitations it was determined a potentiometer to measure angular acceleration and velocity of the drive shaft would initially be sufficient for this test rig.Recommendations are made to improve on the design and to finalize some of the smaller components and operational characteristics of the rig. This report focuses on the overall design of the rig and determining the theory and engineering involved in the process design.Further development and use of this report is recommended so as to construct a full working model of the test rig and to perform initial testing on some oar blades. It is then envisaged the project could be developed into a Masters degree with oar blade manufacturers input to improve the efficiency of both the testing methods and designs of rowing oar blades." @default.
• W85725101 created "2016-06-24" @default.
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• W85725101 date "2006-01-01" @default.
• W85725101 modified "2023-09-27" @default.
• W85725101 title "Design of a test rig to measure rowing blade forces" @default.
• W85725101 hasPublicationYear "2006" @default.
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