04-24-2019, 08:50 PM
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#131 (permalink)
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Interesting.
Drive safe.
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04-25-2019, 07:12 AM
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#132 (permalink)
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Wish I had the time to keep up with you Julian  |
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04-30-2019, 12:49 AM
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#133 (permalink)
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04-30-2019, 01:44 PM
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#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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04-30-2019, 05:18 PM
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#135 (permalink)
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Quote:
Originally Posted by freebeard
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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04-30-2019, 05:43 PM
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#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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05-08-2019, 06:52 PM
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#137 (permalink)
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On-road testing of the Tesla Model S
https://youtu.be/1bCTBUtkaEM |
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05-08-2019, 08:17 PM
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#138 (permalink)
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Quote:
Originally Posted by freebeard
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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05-09-2019, 11:47 PM
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#139 (permalink)
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Quote:
Originally Posted by JulianEdgar
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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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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
Last edited by California98Civic; 05-09-2019 at 11:56 PM..
Reason: typo
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05-10-2019, 03:57 AM
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#140 (permalink)
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Quote:
Originally Posted by California98Civic
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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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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