9-10 プロペラの空気吸込み現象について  [in Japanese] 9-10 An Experiment on Air Draw of a Propeller  [in Japanese]

Propellers draw air continuously or intermittently into the water when they are working near the water surface. The characteristics of propellers, in view point of air draw, are divided into three types, and these three types are related with three types of air draw pattern, say T, M and S-Type.