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Rock, one way to find out for sure is to do a before and after (you cut them off) comparison. You can always glue them back on.
> On Aug 3, 2021, at 12:48 PM, Joe Dubner via groups.io <email@example.com> wrote:
> The attached photo is a Long-EZ NACA inlet. Has anyone seen a geometry like the parts I've circled? What is their purpose? Is there any basis in science for them? (I'm tempted to cut them off to get more air into the cowl.)
> Annotated NACA Inlet.jpg: https://canardzone.groups.io/g/members/attachment/335/0
I remember Klaus talking about adding something like that, with good results.
If you need more air into the inlet, VG’s close to beginning of the “ramp” seem to be the hot ticket.