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Old 01-24-2019, 09:55 AM   #141 (permalink)
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Maybe raising and lowering the ball shows speed difference in the center vs up against the wall.
I think the red ball/sphere is a test object with known Cd for calibration purposes- but could be wrong.

It is so simple looking that I want it to work, but also odd that it does not match other scale model wind tunnels I have seen.

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Old 01-24-2019, 10:21 AM   #142 (permalink)
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I think the red ball/sphere is a test object with known Cd for calibration purposes- but could be wrong.

It is so simple looking that I want it to work, but also odd that it does not match other scale model wind tunnels I have seen.
It might be able to distinguish between smooth and dimpled balls. In test equipment, you get what you pay for. This will work for various classroom demonstrations with a smoke trail, but not have the precision for experimentation.
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Old 01-24-2019, 10:45 AM   #143 (permalink)
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.

https://m.youtube.com/watch?time_con...&v=M59-njHjuZg


More info here.

https://www.instructables.com/id/DIY-Wind-Tunnel/





>
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Old 01-24-2019, 04:04 PM   #144 (permalink)
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Old 01-24-2019, 05:07 PM   #145 (permalink)
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Watch your head if you're standing at the curb when that pulls up.
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Old 01-25-2019, 04:45 AM   #146 (permalink)
It's all about Diesel
 
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Watch your head if you're standing at the curb when that pulls up.
Because of the mirrors or the front overhang?
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Old 01-25-2019, 11:30 AM   #147 (permalink)
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The mirror is outside the width of the buses body and they pull right up to the curb.
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Old 01-26-2019, 12:32 PM   #148 (permalink)
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I just don't know where to put this vehicle, looks like a good spot.

Random TRANSPORTATION pictures - Page 2138 - Pelican Parts Forums
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Old 01-26-2019, 01:31 PM   #149 (permalink)
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It looks like the highway post offices that ran between 1948 and 1974.
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Old 01-29-2019, 12:49 AM   #150 (permalink)
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Rear wiper in a sedan might seem pointless and an aerodynamic disturbance, but it does seem somewhat helpful in some circumstances.


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