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Old 01-12-2021, 04:10 AM   #71 (permalink)
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Originally Posted by JulianEdgar View Post
The movie is good but the real story is better.

I watched the movie hoping for more on the machine than the man, but that was not the case.
The same with Ford vs. Ferrari.

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Old 01-12-2021, 04:14 AM   #72 (permalink)
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For Ford vs Ferrari, read this.

But again not much tech info - but the *real* story, not the film version.

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Old 01-12-2021, 10:36 AM   #73 (permalink)
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Quote:
Originally Posted by JulianEdgar View Post
Boots and bonnets are UK usage, not really Australian as such. We take after the UK in spelling and word usage (and system of government too, actually).
I took both those quizzes after I posted, and they're not accurate--spelling errors like "emergency break" but also outright incorrect distinctions (e.g. we call them "lawyers" in the US).
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Old 01-12-2021, 12:27 PM   #74 (permalink)
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Back on topic?

Quote:
Originally Posted by JulianEdgar View Post
Today I have found two papers that cover turning vanes.

One paper showed that aerofoil sections are much better than flat plates (what I'd found in my testing) and the other showed that really good gains can be made on older cars' A-pillars by the use of turning vanes (which also supports what my tuft testing showed).

So I'd like to fit them to my Insight, but the same old problem remains. No matter how hard I look, I cannot find an aerofoil-shaped aluminum or plastic extrusion that I can easily buy by the metre that's roughly the right size.
If it is not possible to weld 2 sections together to make the length needed, I have had surprisingly good results with J-B Weld, a very strong epoxy. It would be best to add some dowels in the hollow cavities for alignment and support.
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The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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Old 01-12-2021, 05:25 PM   #75 (permalink)
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Model aircraft construction techniques are on point. Foam board wrapped around a spar.
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Old 01-13-2021, 11:13 AM   #76 (permalink)
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Something has been bothering me here: are these reduction because of the airfoil shape or are they because you are increasing the radius of the pillar?
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Old 01-13-2021, 04:21 PM   #77 (permalink)
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Quote:
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Something has been bothering me here: are these reduction because of the airfoil shape or are they because you are increasing the radius of the pillar?
I don't know.

But I know that the tuft pattern changed when the inlet/outlet ratio of the guide was changed, and that a curved plate of the same dimensions as the aerofoil did not cause the better tuft pattern, even when its angle was changed in the same way as the aerofoil.
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Old 01-14-2021, 06:30 AM   #78 (permalink)
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Quote:
Originally Posted by freebeard View Post
Model aircraft construction techniques are on point. Foam board wrapped around a spar.
Or hotwire some foam, and use a carbon/wood spar. 3.44 in below video I found. Add a cutout for the spar in the template.



I think this is a potentially useful technique in aerodynamic modifications, maybe only in specific areas but useful nonetheless.

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