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The Eurofighter Canard has some holes on top side. What are these holes for?

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They aren't holes they're flush screw heads.

The fasteners have some form of recess for the screwdriving tool, like Phillips or tri-wing or similar, and it depends on the lighting whether or not the recesses are emphasized. In the bottom shot the light source from directly above emphases shadows in the screw head recesses. Visibility also depends on the paint coating and how much the paint fills the screw heads.

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  • $\begingroup$ Thanks, I appreciate answer, to me looks like some holes but must be flush screw heads, some Eurofighter-typhoon don't have them , anyway ,another ones have it , but not in the same pattern! Just a curious thing to me. $\endgroup$
    – George Geo
    Commented Sep 29, 2019 at 7:03
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    $\begingroup$ The fasteners have some form of recess for the screwdriving tool, like phillips or tri-wing or similar, and it depends on the lighting whether or not the recesses are emphasized. In the bottom shot the light source from directly above emphases shadows in the screw head recesses. It also depends on the paint coating and how much the paint fills the screw heads. $\endgroup$
    – John K
    Commented Sep 29, 2019 at 18:52
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    $\begingroup$ They are indeed fasteners joining the actuators to the canard, as visibile for example in this cutaway. $\endgroup$
    – sophit
    Commented Nov 1, 2022 at 11:52

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