The dihedral of the wings of Aircraft aids In stability in the: the pitch axis t

Question

The dihedral of the wings of Aircraft aids In stability in the: the pitch axis the roll axis the yaw axis Flow separation on the surface of wings causes increase in the drag due primarily to: increase in skin friction on the lower surface change In the upper surface pressure distribution due to separation separated flow becoming unsteady on the lower surface Aircraft equilibrium requires that: the sum of the forces be equal to zero the sum of the moments equal zero the sum of forces and moments be zero Maximum aerodynamic efficiency occurs when: the lift Is at a maximum value the drag is a minimum the ratio of lift to drag is a maximum Equating the Reynolds and Mach Numbers to prototype and model respectively: assures dynamic similarity justifies wind tunnel experiments with respect to prototype all of the above

Explanation / Answer

1. roll axis

2.changes in the upper surface pressure distribution due to separation

3. sum of the forces and moments should be zero.

4 the ratio of lift to drag is maximum

5.to assure dynamic similarity and justifies wind tunnel experiments with respect to prototype.

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