The aerodynamic moment
coefficient oscillates typically between -0.6 and 0.6 during one trajectory calculation.
The aerodynamic moment
[[bar.M].sub.A] in (22) is composed of the moment defined by the dimensionless aerodynamic coefficients and the moment resulting due to the difference in position of the centre of gravity and the centre of pressure:
It indicates the effect of aerodynamic moment
increment caused by unit change of angle of attack.
In the stage of flow separation in the leading edge, the aerodynamic moment
So the aerodynamic moment
generated by the rudders can be ignored.
The bending moments are directly proportional to the height of the turbine nacelle above the sea bed and therefore there is an incentive to investigate smaller-diameter turbines with larger numbers of blades, which may be slightly less efficient but which having a lower aerodynamic moment
could reduce the support structure cost.
Consequently, a symmetrical profile gives no aerodynamic torque and in this case, at supersonic speed and on zero angle of attack, the coefficient of the aerodynamic moment
[C.sub.m0] is nil (Carafoli, 1969; Seebass & Woodhull 1998).
In (27) and (28), [C.sub.l], [C.sub.m], and [C.sub.n] represent the total 3-axis aerodynamic moment
coefficients, respectively; [[bar.C].sub.l0] represents the sum of aerodynamic rolling moment coefficients without the part contributed by [[delta].sub.a] and [[delta].sub.r]; [[bar.C].sub.m0] represents the sum of aerodynamic pitching moment coefficients without the part contributed by [[delta.sub.e]; [[bar.C].sub.n0] represents the sum of aerodynamic yawing moment without the part contributed by [[delta].sub.a] and [[delta].sub.r] ; and [mathematical expression not reproducible], represent derivative aerodynamic moment
coefficients about [[delta].sub.a], [[delta].sub.e], and [[delta].sub.r].
Since the velocities are not explicit in the dynamic and kinematic equations of rotation, the effect of the wind field on these equations is transitive through the aerodynamic moment
coefficient in the body coordinate system:
The inflated canopy should twist under the action of chordwise aerodynamic moment
. Compared with the spanwise bumps, the torsion has a completely different mechanism.