Need advice on NACA duct placement to airflow on curved surface.

[JulianEdgar]

Originally Posted by freebeard

Cd — perforating a boxed cavity seems counterproductive.

Why?

[freebeard]

I don't understand the question?

[JulianEdgar]

Originally Posted by freebeard

I don't understand the question?

Why do you think that perforating a box cavity seems counterproductive?

[freebeard]

I don't understand the question? >> Why?

If I knew that I'd probably understand.

I went back to your most click-bait title: There is no magic in a Kamm tail!

I remembered it as conflating Kamm-back and Kamm-tail. At 5:35 You have the red, blue and not-green lines. A Kamm-back is a field expedient fix for the area between red and blue lines. I view it as a boxed cavity.

Since I'm minus a Kamm-back and pressure pucks and tubing, I can't establish the differential between the inner and outer face of a Kamm-back. I hope that answers your question.

[JulianEdgar]

Originally Posted by freebeard

I don't understand the question? >> Why?

If I knew that I'd probably understand.

I went back to your most click-bait title: There is no magic in a Kamm tail!

I remembered it as conflating Kamm-back and Kamm-tail. At 5:35 You have the red, blue and not-green lines. A Kamm-back is a field expedient fix for the area between red and blue lines. I view it as a boxed cavity.

Since I'm minus a Kamm-back and pressure pucks and tubing, I can't establish the differential between the inner and outer face of a Kamm-back. I hope that answers your question.

Sorry, I don't understand how any of that answers this question: why do you think that perforating a box cavity seems counterproductive?

Or to put it another way, how do you think a box cavity works and how will that mechanism be impacted by vents?

[freebeard]

I'm not trying to be contrary. That's exactly what I'm fishing for asking.

How would a boxed cavity's effectiveness not be compromised by ventilation.

[JulianEdgar]

Originally Posted by freebeard

I'm not trying to be contrary. That's exactly what I'm fishing for asking.

How would a boxed cavity's effectiveness not be compromised by ventilation.

You're the one putting forward the proposition, not me! Your proposition was:

'perforating a boxed cavity seems counterproductive'

I wondered why you thought that, and I still do.

[freebeard]

That's because you are oblivious to Internet culture. It's the law. Cunningham's Law.

Sherlock Holmes has been known to use the principle at times (for example, in The Sign of the Four.[3]) In "Duty Calls," xkcd references a similar concept.[4]

I can post XKCD again, if it would help.

Declarative, interrogative, and imperative statements ...
https://grammar.collinsdictionary.co...ive-statements
Each sentence in English provides some type of information. For example, a sentence can be a statement, a question, a request, a command, a denial or a response, etc. In English the choice and order of the parts of a sentence help us express these meanings....

'perforating a boxed cavity seems counterproductive'

Okay by me if you just let the personal attacks go.

[JulianEdgar]

Originally Posted by freebeard

That's because you are oblivious to Internet culture. It's the law. Cunningham's Law.


I can post XKCD again, if it would help.



'perforating a boxed cavity seems counterproductive'

Okay by me if you just let the personal attacks go.

Personal attack? What rubbish. I just asked you to support what you had said. That seems pretty basic to me in any rational discussion.

I am interested in talking about car aerodynamics, and you made a point which puzzled me. I asked you to support what you'd said but instead, we got basically nothing.

(And to be frank, I couldn't care less about your internet culture laws.)

[Vman455]

Originally Posted by freebeard

I remembered it as conflating Kamm-back and Kamm-tail.

This distinction only exists in English; both are translations of the German Kamm-heck ("heck" = "rear" or "tail").

Re: ventilated box cavities--I think I have some papers on these, I'll check my desktop when I get home.