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Forum: Aerodynamics 04-20-2024, 12:34 PM
Replies: 14
Views: 365
Posted By freebeard
I'm having trouble sorting out whether the...

I'm having trouble sorting out whether the viscosity of the fluid needs to be greater or less at smaller scales.

Gnats feel air like we do water, so maybe a less viscous fluid like ethanol?
...
Forum: Aerodynamics 03-15-2024, 10:05 AM
Replies: 102
Views: 7,371
Posted By ennored
Another video. Cybertruck at A2 Wind Tunnel...

Another video.

Cybertruck at A2 Wind Tunnel (https://www.youtube.com/watch?v=B43-G5-jwok)
Forum: Aerodynamics 03-11-2024, 10:55 AM
Replies: 22
Views: 1,660
Posted By aerohead
' how better '

There's two things going on with the 'Highland.'
1) Having a single inlet is an aerodynamic advantage in it's own right.
2) And harvesting all the air, right at the forward stagnation point, allows...
Forum: Aerodynamics 02-22-2024, 11:30 AM
Replies: 5
Views: 397
Posted By aerohead
'CHINA: Invasion of low drag cars.....................'

https://uk.motor1.com/news/707512/chinese-cars-more-aerodynamic-than-european/
Forum: Aerodynamics 02-15-2024, 11:02 AM
Replies: 111
Views: 6,098
Posted By aerohead
' 50% '

If one does the Road Load calculations for 'ANY' car, whether Otto-cycle, Diesel-cycle, Otto-Hybrid, Diesel-hybrid, ditto Plug-in hybrids, or BEV, they'll find that, at some thermally-equilibrated,...
Forum: Aerodynamics 01-06-2024, 11:57 AM
Replies: 5
Views: 411
Posted By aerohead
Hilda Margeret Lyon, aero-hydrodynamics

Here's a 'giant' who's shoulders we stand on:https://womenengineerssite.wordpress.com/2018/10/09/hilda-lyon-airships-windtunnels-and-submarines/
PS: I apologize for misspelling her name. 'Margeret'...
Forum: Aerodynamics 01-05-2024, 05:09 PM
Replies: 9
Views: 391
Posted By Phase
Chery .16 CD drag car

https://cnevpost.com/2023/11/02/chery-unveils-concept-car-low-wind-resistance/

very interesting chinese concept design for low drag.

rear box cavity fins and '' shocker'' flat wheel covers
...
Forum: Aerodynamics 12-11-2023, 11:09 AM
Replies: 2
Views: 293
Posted By aerohead
Fully Charged Audi E-Tron GT wind tunnel video

Apologize if this has been posted already. It's worth a look if you haven't seen it....
Forum: Aerodynamics 11-30-2023, 11:10 AM
Replies: 37
Views: 2,548
Posted By aerohead
misc. wheel cover drag quanta

Here's some past published data, just to muddy the waters:
1) for the Cd 0.312, 1982 Pontiac Trans Am Firebird,
* the OEM ventilated convex covers, compared to the naked, welded pressed- steel...
Forum: Aerodynamics 11-27-2023, 11:36 AM
Replies: 37
Views: 2,548
Posted By aerohead
' inside wheel covers'

https://ecomodder.com/forum/member-aerohead-albums-other+vehicles+1-picture115-open-wheel-racer-elevated-view.jpgMany years ago, I got to get up close and personal with Danika Patrick's INDYCAR...
Forum: Aerodynamics 10-06-2023, 07:50 AM
Replies: 111
Views: 6,098
Posted By CapriRacer
To completer this picture we need to know what...

To completer this picture we need to know
what affect inflation pressure has on both traction and wear.

Further, that graph is for a particular tire under a certain load. When tires are...
Forum: EcoModding Central 10-04-2023, 07:00 AM
Replies: 10
Views: 1,056
Posted By MetroMPG
Tested: rolling resistance of Dunlop Enasave vs. Bridgestone RE92 tires

OK! I FINALLY got around to doing this...

Within the past year or so, I happened to score both a set of nearly new Dunlop Enasaves on alloys AND a set of nearly new Bridgestone Potenza RE92's on...
Forum: Aerodynamics 10-03-2023, 06:20 PM
Replies: 111
Views: 6,098
Posted By Phase
the tire size on the new 2023 prius LE is...

the tire size on the new 2023 prius LE is P195/60R17

what are your estimates in fuel economy improvement if dropping those down to 15 inch wheels?
Forum: Aerodynamics 08-10-2023, 03:43 PM
Replies: 11
Views: 1,671
Posted By freebeard
I only watched it once. More interested in...

I only watched it once. More interested in lighter cars.

What's a 'capsel'?
Forum: EcoModding Central 05-19-2023, 09:00 AM
Replies: 12
Views: 877
Posted By CapriRacer
That graph is lifted directly from this paper: ...

That graph is lifted directly from this paper:

https://azb4fstg-cdn-endpoint.azureedge.net/mediacontainer/medialibraries/smithersb4f/resources/2023/smithers_effect_of_temp_01102023v2.pdf?ext=.pdf...
Forum: Aerodynamics 05-18-2023, 12:07 PM
Replies: 11
Views: 1,671
Posted By aerohead
tires / wheels

* Very often, it's reported that the 'larger' wheels on BEVs come with a 'penalty' to range.
* And a number of researches have confirmed the efficacy of 'aero' wheels as pertaining to range...
Forum: EcoModding Central 05-17-2023, 01:08 PM
Replies: 12
Views: 877
Posted By CapriRacer
Tire Rolling Resistance Increases as the temperature drops!

From Tire Business May 8, 2023

How does temperature affect rolling resistance?

By Erin Pustay Beaven

GREENVILLE, S.C.

Range can be a very tricky thing. Electric vehicle range is, simply,...
Forum: Aerodynamics 06-30-2022, 11:16 AM
Replies: 54
Views: 5,811
Posted By aerohead
DATA UPDATE

Pages 70,71, August 2022, MOTOR TREND, 'MERCEDES' MEGAMETEREV', by Frank Marcus provides some specifics for the M-B Vision EQXX.
100 kWh, ( 2.9669-gallons-e )
713-miles range at average 56-mph (...
Forum: Aerodynamics 06-13-2022, 11:41 AM
Replies: 51
Views: 3,866
Posted By aerohead
Onorato's shape

I revisited the publication. It turns out that what Onorato presented is a von Mises profile, invented by Richard Von Mises, in 1915.
It's a 'fast' aft-section contour which could experience...
Forum: Aerodynamics 06-07-2022, 08:46 PM
Replies: 51
Views: 3,866
Posted By tomi_k
The Cd 0.158 shape start to look more or less...

The Cd 0.158 shape start to look more or less like Onorato's shape on page #4 on below publication....
...
Forum: Aerodynamics 06-06-2022, 12:15 PM
Replies: 51
Views: 3,866
Posted By aerohead
AST diffuser angle

https://ecomodder.com/forum/showthread.php/aerodynamic-streamlining-template-part-c-9287.html#post116392a) The images may not have been of sufficient clarity.
b) The diffuser is actually 2.8-degrees...
Forum: Aerodynamics 06-02-2022, 01:02 PM
Replies: 51
Views: 3,866
Posted By aerohead
images

Let's try this. If it doesn't work I'll go for help, or put a copy of the 'blueprint' in the mail to you.https://ecomodder.com/forum/showthread.php/baby-template-car-darko-2016-a-32673-13.html
The...
Forum: For Sale 05-28-2022, 03:46 PM
Replies: 25
Views: 18,086
Posted By rmay635703
Once they hit 25 years old easy peasy If...

Once they hit 25 years old easy peasy

If it’s under 3000lbs a few states allow them imported as an NEV if you restrict the speed.
Forum: EcoModding Central 05-25-2022, 06:09 AM
Replies: 5
Views: 770
Posted By alexshock
I use Mapy.cz Android app for such measures. It...

I use Mapy.cz Android app for such measures.
It calculates route, average speed, distance, time and even elevation profile.
(I think it was developed for cycling, but it is pretty useful for cars...
Forum: Aerodynamics 01-24-2022, 11:43 AM
Replies: 54
Views: 5,811
Posted By aerohead
EQXX dimensional deeper dive

1) After printing the plan-view photograph, and using the published length, here's a list of estimated dimensions and ratios for the car:
Length ( L) - 4630mm
Width ( W) - 1679mm
Height (H) -...
Showing results 1 to 25 of 260
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