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Search took 0.13 seconds. Search: Posts Made By: Vekke
Forum: Aerodynamics 03-19-2024, 06:19 AM
Replies: 102
Views: 7,337
Posted By Vekke
I think they did not adjust the frontal area...

I think they did not adjust the frontal area change in mirror removal and lowering. I think they should then readjust their correction factors for the tunnel. I tried to ask that in the youtube...
Forum: Aerodynamics 03-15-2024, 06:50 AM
Replies: 102
Views: 7,337
Posted By Vekke
Some nice video footage and testing in this...

Some nice video footage and testing in this video:
https://youtu.be/fG8YRQsaZhA?si=49uDrer00zuumnz8
Forum: Aerodynamics 03-12-2024, 03:31 AM
Replies: 22
Views: 1,646
Posted By Vekke
And when active grill block is closed in normal...

And when active grill block is closed in normal driving all the pressure goes to those air curtains.

3. also the outside flow is not interrupted by vent inlets shapes, which helps little as well.
Forum: Aerodynamics 03-11-2024, 03:53 AM
Replies: 22
Views: 1,646
Posted By Vekke
Some interesting engineering facts about the new...

Some interesting engineering facts about the new tesla model 3 in this video:

https://www.youtube.com/watch?v=RewrTJqc0wU
Forum: Aerodynamics 02-27-2024, 05:52 AM
Replies: 5
Views: 326
Posted By Vekke
2021- Ford f-150 active air dam

Hi,

Does anyone have idea how much lower the air dam comes down from underside lowest flat points of the vehicle?

If you have pictures from back towards front would also help to estimate the...
Forum: Fossil Fuel Free 01-26-2024, 03:32 AM
Replies: 3
Views: 725
Posted By Vekke
EV efficiency maps

Yesterday I found this Finnish guy called Santeri Pöyhönen who had made a lovely chart of his Opel Corsa e consumption at different speeds and outside temperatures.
...
Forum: Aerodynamics 01-10-2024, 09:44 AM
Replies: 5
Views: 399
Posted By Vekke
I think its just a helium filled foil balloon at...

I think its just a helium filled foil balloon at least the first versions. No frame needed as just the ball is inflated and has proper pressure to keep its shape.

camera equipment used does not...
Forum: Aerodynamics 01-10-2024, 04:09 AM
Replies: 5
Views: 399
Posted By Vekke
Airships are making a comeback. My friends...

Airships are making a comeback. My friends company is making these in Finland:

https://kelluu.com/

Some cool things you can do with those that are not possible with other flying machines
Forum: Aerodynamics 01-08-2024, 03:06 AM
Replies: 9
Views: 388
Posted By Vekke
Those active arch gap fillers make a big...

Those active arch gap fillers make a big difference. Do they work in real life is a another question. Similar could be made pretty easily in own workshop.
Forum: Aerodynamics 12-21-2023, 01:20 AM
Replies: 111
Views: 6,032
Posted By Vekke
In the end from 12.40 some data on tires impact...

In the end from 12.40 some data on tires impact to evs aerodynamics. Rounded corners on winter tires impact whole cars drag coefficient 0.02.
http://youtu.be/1KGiVzNNW8Y?si=abV0x4A0ryLRNMaj
Forum: Aerodynamics 12-12-2023, 03:11 PM
Replies: 102
Views: 7,337
Posted By Vekke
Outer edge of the wheelcovers is soft rubber....

Outer edge of the wheelcovers is soft rubber. Only way to make oversize wheelcovers work. Otherwise they grind pockets to the tire. I did that mistake around 2009
Forum: Aerodynamics 12-01-2023, 01:11 PM
Replies: 22
Views: 1,646
Posted By Vekke
Today had a Gigafactory Berlin factory tour and...

Today had a Gigafactory Berlin factory tour and there was new model 3 higland there on the yard

Air curtains are still there ;)

Behind the bumber and air inlet at the front bumber air intake...
Forum: Aerodynamics 11-23-2023, 08:22 AM
Replies: 37
Views: 2,523
Posted By Vekke
It also covers lower suspension arm if you zoom...

It also covers lower suspension arm if you zoom in and turns with the wheel this one. Front edge should have radius, but in this it comes up so much I did not build a radius.
Forum: Aerodynamics 11-22-2023, 03:03 AM
Replies: 37
Views: 2,523
Posted By Vekke
Optimal tire size I would try in model 3 is...

Optimal tire size I would try in model 3 is 195/60R17 from new toyota prius.

In that size you can also get wheelcovers easily and use just steel wheels.



Inside wheel covers surely works....
Forum: Aerodynamics 11-10-2023, 07:06 AM
Replies: 39
Views: 14,710
Posted By Vekke
XL1 covers are not flat they are "convex" as you...

XL1 covers are not flat they are "convex" as you can see from my video shot at the vw dealer little while ago. They come out actually quite much.
https://www.youtube.com/watch?v=5Jp83gkrY_M&t=3s
...
Forum: Aerodynamics 11-01-2023, 05:41 AM
Replies: 111
Views: 6,032
Posted By Vekke
Found a error in my grundkörper picture...

Found a error in my grundkörper picture calculations. Here is corrected values so in these the wheel drag is mostly higher than in the previous video.
...
Forum: Aerodynamics 10-27-2023, 09:42 AM
Replies: 111
Views: 6,032
Posted By Vekke
Can you please tell the benefits of wider tires...

Can you please tell the benefits of wider tires you are referring?

https://www.youtube.com/watch?v=Bgz0qF3CuNA

I think water performance is much more important metric than little gains that can...
Forum: Aerodynamics 10-26-2023, 12:17 PM
Replies: 111
Views: 6,032
Posted By Vekke
Made some explanational video on the matter....

Made some explanational video on the matter. https://youtu.be/sRzaYvnW2JU
Forum: EcoModding Central 10-04-2023, 11:49 AM
Replies: 10
Views: 1,035
Posted By Vekke
Look how the tire roundness is also near the...

Look how the tire roundness is also near the edges and measure the contact patch width. If one is 10mm narrower it propably performs better at high speed...

To measure drive first on gravel road...
Forum: Aerodynamics 10-03-2023, 04:30 AM
Replies: 111
Views: 6,032
Posted By Vekke
50% of your EV energy consumption comes from wheels and tires

I have been cracking some numbers related to my new wheels and tires and it seems that 50% of your electric cars energy consumption comes from wheels and tires. So saving potential is huge.
...
Forum: Fossil Fuel Free 09-28-2023, 10:52 AM
Replies: 17
Views: 1,072
Posted By Vekke
Depends how you drive, mainly the top speed. In...

Depends how you drive, mainly the top speed. In most cases with evs will work without major problems.

You can calculate what thickness you would need when you know your top speeds and driving...
Forum: Fossil Fuel Free 09-26-2023, 04:32 PM
Replies: 174
Views: 17,012
Posted By Vekke
Those big tentacles come from mirrors and smaller...

Those big tentacles come from mirrors and smaller ones from roof pillars.

Crunched some numbers today for presentation and did you know that half of your cars consumption comes from wheels and...
Forum: Aerodynamics 09-23-2023, 12:38 PM
Replies: 11
Views: 1,665
Posted By Vekke
More wheels and tires are being bougth for the...

More wheels and tires are being bougth for the next tests:
Now I have 2 sets 195/60R18 e primacys.
215/55R18 Continentals
For those I have 7x18, 7,5x18 and 8x18 wheels to see which strech is best...
Forum: Fossil Fuel Free 09-13-2023, 12:16 PM
Replies: 174
Views: 17,012
Posted By Vekke
I can make overlay.

I can make overlay.
Forum: Fossil Fuel Free 09-12-2023, 04:12 PM
Replies: 174
Views: 17,012
Posted By Vekke
Some new aerodynamic data....

Some new aerodynamic data. https://airshaper.com/validation/tesla-model-y-wind-tunnel-test
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