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Table 1 Aerodynamic forces and moments signs according to the sign of angle of attack and side-slip angle

From: Optimal shape design of an airship based on geometrical aerodynamic parameters

\((\alpha , \beta )\)

\(f_{x,a}\)

\(f_{y,a}\)

\(f_{z,a}\)

\(M_{a}\)

\(N_{a}\)

\((+, +)\)

−

−

−

\(+\)

−

\((+, -)\)

−

\(+\)

−

\(+\)

\(+\)

\((-, +)\)

−

−

\(+\)

−

−

\((-, -)\)

−

\(+\)

\(+\)

−

\(+\)