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Forum: Events & Meet-ups 04-14-2024, 01:40 PM
Replies: 17
Views: 1,893
Posted By UltArc
I always plan on doing a recap of the GGP, and...

I always plan on doing a recap of the GGP, and pretty much never do. I get home and get back into the swing of things and that's that. Maybe since I'm sick and just laying around, I'm motivated this...
Forum: Aerodynamics 04-01-2022, 11:56 AM
Replies: 42
Views: 5,057
Posted By Snax
Fortunately, here in Oregon, the code is...

Fortunately, here in Oregon, the code is relatively open:

"(2) A rearview mirror or device only
meets the requirements of this section if it
enables the driver of the vehicle to have
such a...
Forum: Aerodynamics 08-11-2021, 11:56 AM
Replies: 9
Views: 2,025
Posted By California98Civic
Yeah. They should do that before selling people...

Yeah. They should do that before selling people stuff. Their claims are really for the unicorn corral, no? I mean big sales claims contradicting known research but that are nonetheless presented...
Forum: Aerodynamics 06-22-2021, 03:53 AM
Replies: 23
Views: 2,629
Posted By JulianEdgar
Another one from the Uno - front spoiler depth....

Another one from the Uno - front spoiler depth. (No smooth underfloor in a car of this age.)

https://i.postimg.cc/2ygXzTMZ/Uno-front-spoiler.png
Forum: Aerodynamics 05-30-2021, 03:43 AM
Replies: 200
Views: 13,254
Posted By JulianEdgar
In a nutshell, this is why I really dislike...

In a nutshell, this is why I really dislike "thought experiments" on web discussion groups. (Not just this thread - all of them.)

Anyone - anyone at all - can come up with ideas that might...
Forum: EcoModding Central 05-28-2021, 11:02 AM
Replies: 84
Views: 8,011
Posted By redneck
🦄 :turtle: > .

🦄


:turtle:

>

.
Forum: Aerodynamics 05-04-2021, 05:08 AM
Replies: 90
Views: 8,514
Posted By Isaac Zachary
I'm sorry, but I don't believe that ginormous =...

I'm sorry, but I don't believe that ginormous = safe propaganda one bit.

Sure, in a head-on collision you're safer in a heavier vehicle. But looks can be deceptive. A 2021 Ford F-150 starts out at...
Forum: Aerodynamics 04-25-2021, 04:46 PM
Replies: 88
Views: 20,134
Posted By JulianEdgar
Interesting pics but the explanations are at the...

Interesting pics but the explanations are at the typically quite confused level of so many similar websites.

The amount of air flowing under the car is small, due to the presence of the front...
Forum: Aerodynamics 03-21-2021, 11:58 PM
Replies: 0
Views: 887
Posted By JulianEdgar
Car Aerodynamic Testing - 2nd edition

https://i.postimg.cc/8kK0d849/cover.png

For anyone interested, I have published a second edition of my Car Aerodynamic Testing book.

Contents:

Chapter 1 – The approach

The different...
Forum: Fossil Fuel Free 03-16-2021, 01:32 PM
Replies: 1
Views: 1,175
Posted By MetroMPG
Politics. Nope. Let's cool it down with the...

Politics. Nope.

Let's cool it down with the US vs. THEM ... and talk about vehicles instead.
Forum: Aerodynamics 01-30-2021, 07:44 PM
Replies: 13
Views: 1,325
Posted By Cd
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC71533...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7153308/

This is not about trains, but I wanted to share and didn't know where to add it in the forum.
Forum: Aerodynamics 01-30-2021, 06:25 AM
Replies: 24
Views: 3,502
Posted By AeroMcAeroFace
Seeing as you are obsessed with BSFC, have you...

Seeing as you are obsessed with BSFC, have you considered how much less efficient the motor and controller get at higher speeds and lower loads. It seems like a critical oversight for you to ignore.
Forum: Aerodynamics 01-27-2021, 04:54 PM
Replies: 28
Views: 2,121
Posted By MeteorGray
Julian has added an enormous amount of knowledge...

Julian has added an enormous amount of knowledge to this site in a short period of time, and he has done so in clear, concise and interesting ways.

It's very rare to find someone who does so much...
Forum: Aerodynamics 01-21-2021, 06:18 AM
Replies: 28
Views: 2,121
Posted By AeroMcAeroFace
Julian isn't here to defend this, throttle stop...

Julian isn't here to defend this, throttle stop testing is like coast down testing, susceptible to environmental effects. Doing multiple consecutive A-B runs a few minutes apart will mean that the...
Forum: The Lounge 01-13-2021, 09:28 PM
Replies: 4
Views: 722
Posted By JulianEdgar
Understanding and measuring suspension natural frequency

Here (https://www.linkedin.com/pulse/measuring-suspension-natural-frequencies-julian-edgar)
Forum: Aerodynamics 12-29-2020, 04:28 PM
Replies: 62
Views: 5,484
Posted By JulianEdgar
Single puck in rear bumper, Magnehelic gauge,...

Single puck in rear bumper, Magnehelic gauge, pitot static reference, 80 km/h, gusty wind at 10 km/h. Suspension height variation in round terms from lowest to highest is about 75mm. Honda Insight...
Forum: Aerodynamics 12-29-2020, 12:00 AM
Replies: 17
Views: 1,457
Posted By JulianEdgar
Relationship between body pressures on the rear panels and the base pressure

Summarising what the experts told me.

There are two main theories used to describe the relationship between body pressures on the rear panels (eg side panels) of a car and the base pressure. One...
Forum: Aerodynamics 12-27-2020, 10:57 AM
Replies: 25
Views: 1,992
Posted By AeroMcAeroFace
How much do you think (although of course there...

How much do you think (although of course there is no way of knowing without testing) of the benefit of your air curtains come from the increased surface pressures pulling back less, on the tapered...
Forum: Aerodynamics 12-27-2020, 02:46 AM
Replies: 25
Views: 1,992
Posted By JulianEdgar
Side pressures and attached flow

My Edgarwit air curtains give a measured reduction in drag (using the throttle stop method) and tuft testing shows slightly better flow attachment on the side panels behind the front wheels.

My...
Forum: Aerodynamics 11-17-2020, 09:41 AM
Replies: 272
Views: 16,252
Posted By AeroMcAeroFace
"Addressing this problem, our shape...

"Addressing this problem, our shape representation is based on deforming a template mesh."

Please don't take quotes out of context, the full quote is included here if you don't have access to the...
Forum: EcoModding Central 11-03-2020, 11:18 AM
Replies: 44
Views: 5,224
Posted By Ecky
Some of Toyota's offerings come darn close, and...

Some of Toyota's offerings come darn close, and could probably realistically get 41+ highway.
Forum: Aerodynamics 10-17-2020, 09:25 PM
Replies: 77
Views: 4,959
Posted By sgtlethargic
How about we discuss it further in a new thread? ...

How about we discuss it further in a new thread?

https://ecomodder.com/forum/showthread.php/aerodynamic-streamlining-template-b-discussion-b-38687.html#post633952
Forum: Introductions 10-12-2020, 12:14 AM
Replies: 28
Views: 2,020
Posted By freebeard
Beanie.

Beanie.
Forum: Aerodynamics 08-22-2020, 09:06 PM
Replies: 160
Views: 9,183
Posted By JulianEdgar
Sorry, but I have this really weird idea that...

Sorry, but I have this really weird idea that misinformation being spread isn't beneficial to people, and should be called out.

Strange, I know, that I don't want to see people being continually...
Forum: Aerodynamics 08-05-2020, 01:08 PM
Replies: 6
Views: 624
Posted By aerohead
Visio.M, 2-seat, BEV, Cd 0.24

This car may have been posted already. It's a couple of years old now. A lightweight, 2-seat, BEV, with small battery pack, and range of around 99-miles.
They give it Cd 0.24. Pretty good for such a...
Showing results 1 to 25 of 198
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