This paper describes a programme of model tests and computer predictions which was designed to assist in the selection of a hull design for a new ship, and ensure that it would meet the owner's requirements. Whilst that is a common requirement of model tests, this case was unusual because the subject was a 50 metre wooden sailing ship for disabled crews, and a choice had to be made with regard to a wide range of operational requirements.

The paper describes the background to the project, the scope of the testing, the presentation of the results, and their implications for the design. A general outline of the whole project is given, rather than details of specific tests or results, because of the dual limitations of space and confidentiality to the client, Tony Castro Ltd. It is hoped that the paper will provide an illustration of the range of investigations which are now available to assist in the design stages of any sailing vessel.

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