Aircraft Control Surfaces to Fixed Surface Gap Question

Moveable surface gaps can be sealed in various ways depending on aircraft size. At the smallest simplest end, elastomeric seals or even fabrics, at the larger end of the scale, flexible or hinged panels.
However it sounds like you are able to change the leading edge profile, I'd start by looking at that, provided it does not affect performance.

Thanks Ng2020...sealing is an option which we have not considered so far...but something to consider. Yeah, the intent of the study is to determine if LE shape affects performance...I'd start by reducing the LE round shape to a much smaller curvature...

Anyways, thanks for your replies. So far, I was not able to find out alternate shapes for control surfaces LE profile...sounds like circular one is a winner

The latest development work is on morphing wing shapes that have continuous outer skins that are flexed into different shapes, so that there are no gaps in any position.

Morphing wing tech might be out of my/our ability...BTW, are there any practical examples of morphing wing being used? Definitely something to consider

The Wright Flyer

NOTE. I believe Your use of terms in the problem definition is non-standard... and I'm confused by Your problem elements.

As I 'hear Your issue'... this sounds really like 2-major/spearate problems…

Torsional/bending wing-stiffness [or lack-of-stiffness] for control-forces reactions and...

Control-surface-to-wing/stabilizer structure... 'gap', 'fair' and 'seal' for consistent control surface power/moment/min-drag.

Also, in the 'real-world' you may need to be wary-of [concerned-about], the effects of weather [IE: moisture/rain/snow/ice/abrasion-erosion, etc] and maintainability [IE: degree of difficulty access/alignment/fastening, etc] and flutter or random/tramp-vibrations and internal-structure load reactions due to control actuation and feed-back.

NOTE. The design of control surfaces interfacing to wing/stabilizer structure has been addressed in various NACA or NASA reports... lots of ways to accomplish what You are asking about... but, I'm drawing blanks about which-ones... and no-time to search for You.

Just random thoughts...

Regards, Wil Taylor
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