A theory is presented to show simply the essential effect of sweep angle on divergence and aileron reversal. For this purpose, several simplification assumptions are introduced such as high aspect ratio, strip theory of aerodynamics, effective wing root and tip, assumed mode shapes for bending and torsion, etc. Thus a kind of theory for "typical section" is developed. The result shows that the divergence speed would be increased and decreased by sweep back and forward, respectively-as well-known. But for aileron reversal, the result seems not to agree with descriptions in usual text books. The result obtained here suggests that the reversal speed increases irrespective of sweep back or forward, while the lift due to aileron angle increases and decreases for sweep forward and back, respectively.
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