Abstract
Investigation is made on the drag and thrust efficiency of an airship with a stern propeller. Interference was expected between the airship hull and the propeller. For the analysis of the interference, measurements were performed on the form drag of an airship with and without a propeller, the propeller efficiency and the total efficiency of the airship. Furthermore inviscid computation was carried out regarding the propeller effects on the total vehicle propulsive efficiency. It was clarified that the propeller’s direct effect on the hull surface pressure change is weaker than the effect of the boundary layer separation, and this implies that the realization of inviscid flow field would give the maximum thrust efficiency.
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