Chord line and angle of attack
- It has already been mentioned that the angle of inclination to the airflow is of great importance. On a curved aerofoil, it is not particularly easy to define this angle, since we must first decide on some straight line in the aerofoil section
- from which we can ensure the angle to the direction of the airflow.
- Unfortunately, owing to the large variety of shapes
used as aerofoil sections it is not easy to define this chord line to suit all aerofoils. Nearly all modern
aerofoils have a convex under-surface, and the chord must be specially defined,
although it is usually taken as the line joining the leading edge to the
trailing edge.
Comments
Post a Comment