Effective Aspect Ratio for Twin Vertical Tail

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For Twin vertical tail, the effective aspect ratio is given by:

 

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The ratio of the effective vertical tail aspect ratio to the vertical tail aspect ratio is found from Figure 10.19 in Airplane Design Part VI. It is a function of the vertical distance from the horizontal tail to the vertical tail tip and the vertical tail span.

 

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Back to Effective Aspect Ratio for Single Vertical Tail.