Aerodynamic Characteristics of a Small-Scale Shrouded Propeller at Angles of Attack from 0 deg to 90 deg

摘要

An investigation has been made to determine the effects of airspeed and angle of attack on the lift, drag, and pitching moment of a shrouded- propeller model, having a shroud length of about two-thirds the propeller diameter, over an angle-of-attack range from 0 deg to 90 deg. Tests were made of the complete model with the propeller operating and also of the shroud and motor combination with the propeller removed. The effect of inlet-lip cross-sectional radius on the static-thrust characteristics was also studied. These tests were made in connection with the design of a vertical-take-off free-flight model and the results are presented herein without analysis as it is felt that they may be useful in the design or analysis of other aircraft.