A new technique for determining Field Point Velocities around a propeller using Laser Doppler Anemometry. The details of the technique plus the selected results of three experiments are presented. The results presented show field point velocities around a skewed propeller and around a tandem propeller. The skewed propeller was tested both in uniform inflow and in the axisymmetric wake. The first demonstrated the technique’s accuracy by comparing it favorably to computer potential flow predictions. The second test demonstrated the ability of the new technique to study small-scale features, specifically tip forces in detail. The tandem propeller was tested in two different configurations, both in uniform inflow. This demonstrated the agility of the new technique to d large quantity testing over large areas.

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