question\n\na stall occurs when the smooth airflow over the unmanned aircrafts wing/propeller(s) is…

question\n\na stall occurs when the smooth airflow over the unmanned aircrafts wing/propeller(s) is disrupted, and the lift degenerates rapidly. this is caused when the wing/propeller(s)\n\nanswer choices\n\nexceeds maximum allowable operating weight.\n\nexceeds the maximum speed.\n\nexceeds its critical angle of attack.

question\n\na stall occurs when the smooth airflow over the unmanned aircrafts wing/propeller(s) is disrupted, and the lift degenerates rapidly. this is caused when the wing/propeller(s)\n\nanswer choices\n\nexceeds maximum allowable operating weight.\n\nexceeds the maximum speed.\n\nexceeds its critical angle of attack.

Answer

Brief Explanations:

In aerodynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded. At this point, the smooth laminar airflow over the upper surface of the wing or propeller blade separates and becomes turbulent, leading to a rapid loss of lift and an increase in drag. While factors like weight and speed can influence the conditions under which a stall occurs, the direct physical cause of a stall is always exceeding the critical angle of attack.

Answer:

exceeds its critical angle of attack.