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2 Answers

Ground Effect Clarity

Asked by: 3159 views Aerodynamics

I understand the theory of ground effect except one component of which is upwash. I understand what upwash is but would like to know in simple terms how upwash is altered in ground effect.

 

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2 Answers



  1. Brian on Jun 16, 2014

    Figure 6.9 of Aerodynamics for Naval Aviators (AFNA) shows exactly how upwash is effected when an aircraft enters ground effect. See this link: http://www.faa.gov/regulations_policies/handbooks_manuals/aviation/media/00-80t-80.pdf

    The AOA is reduced due to the change in local relative wind. The picture is pretty explicit on this. Have a read through the other 3 pages and that should clarify any other questions you have on this topic.

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  2. Dan Chitty on Jun 17, 2014

    Brian,

    Thank you for the info. I read the section you mention and it was helpful.

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