Abstract
We examined the drag and thrust efficiency of an airship with a stern propeller. It is supposed that there is a mutual interference between the airship hull and the propeller. To obtain a understanding of the interference, we measured the form drag of airship with and without a propeller, the propeller efficiency and the total efficiency of the airship. Furthermore we carried out inviscid computation for the effect of the propeller on the airship efficiency. It was clarified that the direct ; effect of the propeller on the pressure on the hull surface is weaker than that on the boundary layer separation and also expected that the inviscid flow field would give the best thrust efnciency.
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