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Old 04-24-2019, 08:50 PM   #131 (permalink)
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Interesting.

Drive safe.

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Old 04-25-2019, 07:12 AM   #132 (permalink)
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Old 04-30-2019, 12:49 AM   #133 (permalink)
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An easy one this time: https://youtu.be/GKamOhDza6U
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Old 04-30-2019, 01:44 PM   #134 (permalink)
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Both my vehicles have problems in this area. The Beetle is pretty hopeless, that's the area the engine cooling air comes from.



Isn't the rear roof angle about the worst it could be? I'm thinking that an extension should be fairly short across the top, but with sail panels down to the beltline. Creating vortexes that roll onto and reattach to the window glass.

At least I don't have taillights to deal with like the Roomster and Insight.
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Old 04-30-2019, 05:18 PM   #135 (permalink)
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Quote:
Originally Posted by freebeard View Post
Both my vehicles have problems in this area. The Beetle is pretty hopeless, that's the area the engine cooling air comes from.



Isn't the rear roof angle about the worst it could be? I'm thinking that an extension should be fairly short across the top, but with sail panels down to the beltline. Creating vortexes that roll onto and reattach to the window glass.

At least I don't have taillights to deal with like the Roomster and Insight.
You could try directly measuring the pressures across the rear window and then trialing different shaped extensions and seeing what happens to those pressures.
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Old 04-30-2019, 05:43 PM   #136 (permalink)
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Thanks. I'm speaking hypothetically, step #1 would be putting insurance back on it so it can be used on public highways.
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Old 05-08-2019, 06:52 PM   #137 (permalink)
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On-road testing of the Tesla Model S

https://youtu.be/1bCTBUtkaEM
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Old 05-08-2019, 08:17 PM   #138 (permalink)
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Quote:
Originally Posted by freebeard View Post
Both my vehicles have problems in this area. The Beetle is pretty hopeless, that's the area the engine cooling air comes from.



Isn't the rear roof angle about the worst it could be? I'm thinking that an extension should be fairly short across the top, but with sail panels down to the beltline. Creating vortexes that roll onto and reattach to the window glass.

At least I don't have taillights to deal with like the Roomster and Insight.
What I took away from that video is that airflow stays attached at some pretty severe angles. My Celica has a similar shape and preliminary dust testing suggests the rear window has attached flow.
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Old 05-09-2019, 11:47 PM   #139 (permalink)
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Quote:
Originally Posted by JulianEdgar View Post
On-road testing of the Tesla Model S

https://youtu.be/1bCTBUtkaEM
So, this is a really good video. It deserves more attention than it's going to get posted in this nondescript way burried in this thread. I hope the OP will consider creating a new thread just for the video.
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Last edited by California98Civic; 05-09-2019 at 11:56 PM.. Reason: typo
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Old 05-10-2019, 03:57 AM   #140 (permalink)
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Quote:
Originally Posted by California98Civic View Post
So, this is a really good video. It deserves more attention than it's going to get posted in this nondescript way burried in this thread. I hope the OP will consider creating a new thread just for the video.
Thank you!

Personally, I think for the amateur modifier, my videos on measuring surface body pressures are more of a breakthrough. eg https://youtu.be/Vb859fOe-S0

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