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Ship Hull Resistance and Thrust Deduction Fraction from Overload Tests Alone

The idea to identify wake and thrust deduction fractions at full scale ships from propulsion tests alone has been proposed by the present author more than ten years ago and developed over the years. In recent accounts of model tests with propellers in ducts and tunnels and of the model and full scale tests with the research vessel METEOR the axiomatic solution proposed has reached a certain state of maturity permitting wider application. The purpose of this paper is to describe only the solution of the resistance and thrust deduction problem in the most concise form in order to promote its general acceptance by showing its relation to the traditional approach and more recent proposals, e. g. by Holtrop and Kracht. The solution of the wake problem has been treated elsewhere.