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Forum: Aerodynamics 01-16-2024, 08:23 AM
Replies: 1,084
Views: 256,988
Posted By Tahoe_Hybrid
anything extending out more then a two feet...

anything extending out more then a two feet require it that is a non marked trailer at lest a red flag
Forum: Aerodynamics 07-29-2023, 04:25 PM
Replies: 156
Views: 31,650
Posted By CigaR007
So I hit somewhat of a snag while looking at the...

So I hit somewhat of a snag while looking at the rear diffuser. The entire structure was slanted towards the rear. Newbie mistake, as I was mostly working at an angle, the car being on plastic ramps....
Forum: Aerodynamics 07-23-2023, 10:41 AM
Replies: 854
Views: 65,455
Posted By alexshock
Use special nuts instead: ...

Use special nuts instead:
https://ecomodder.com/forum/attachment.php?attachmentid=33992&stc=1&d=1690123255
Forum: Aerodynamics 07-20-2023, 10:38 AM
Replies: 854
Views: 65,455
Posted By aerohead
'HOT WHEELS'

At Texas Tech their minimum model scale for the water tunnel was 1:24. That was for 'qualitative' work only. No measurements possible.
The underwater tow-tank used 2/3rds-scale models. $ 68,000 for...
Forum: Aerodynamics 05-08-2023, 04:35 PM
Replies: 24
Views: 20,096
Posted By aerohead
'holding'

What's left of me is doing okay compared to some I see around me.
I never found out what happened back in October due to a glitch in way the VA and private healthcare providers interact.
If I can...
Forum: Aerodynamics 05-08-2023, 04:06 PM
Replies: 6
Views: 638
Posted By aerohead
' K'u'chemann carrots'

1) The 'spacious interior' is interesting.
2) It looks as if, in order to satisfy rollover and roof-crush requirements, that Toyota raised the rear hatch hinge mechanism above the roofline, creating...
Forum: Aerodynamics 05-08-2023, 03:29 PM
Replies: 7
Views: 649
Posted By aerohead
180-MPH quarter, back of the envelope

1) With the forced-induction, the compressor is going to 'get' the air, whether it receives any help from ram-air or not.
2) A look at some simple, Newtonian, F=M X A online horsepower calculators...
Forum: Aerodynamics 05-08-2023, 09:58 AM
Replies: 6
Views: 638
Posted By Cd
From the Lexus press kit : SHAPED FOR...

From the Lexus press kit :

SHAPED FOR AERODYNAMIC PERFORMANCE

RZ’s spindle shape design generates a distinctive roof spoiler to suppress aerodynamic force acting on the body in a crosswind....
Forum: The Lounge 04-08-2023, 05:41 AM
Replies: 7
Views: 592
Posted By Xist
Have you ever made your own car ramps?

My jack and stands were tied up under my 2002 Civic. I have plastic ramps in the Accord trunk 3.5 hours away. My new schemes and plans weren't working. I just bought a 2x8, cut it in half, cut...
Forum: Aerodynamics 03-31-2023, 11:00 AM
Replies: 22
Views: 1,843
Posted By aerohead
'another idea'

I think you'll like mpgs and rear downforce ( reduced rear lift ) the cap provides.
'bondo' ( member Brett Herndon ) sent me a Masters Thesis from a US Navy officer, who CFD and road-tested a cap,...
Forum: Aerodynamics 03-24-2023, 05:46 AM
Replies: 22
Views: 1,843
Posted By t vago
Here's another idea for a truck aerocap - very...

Here's another idea for a truck aerocap - very little roof/sail interaction.



And it did take some fair amount of work.
Forum: Aerodynamics 03-23-2023, 10:58 AM
Replies: 22
Views: 1,843
Posted By aerohead
'referring to?'

Yes, exactly. It's the Bournoulli Theorem at play.
Air over the truck is taking a longer path than along the side, yet arriving at the same time; requiring a higher velocity to compensate.
There's...
Forum: Aerodynamics 03-19-2023, 12:28 AM
Replies: 22
Views: 1,843
Posted By j-c-c
On my 2004 Tacoma, I did something very similar....

On my 2004 Tacoma, I did something very similar. I was not looking for max mileage over functionality. Regardless the results surprised me. I wanted to retain rear window useful visibility via the...
Forum: The Lounge 03-18-2023, 07:51 PM
Replies: 19
Views: 1,217
Posted By freebeard
Youtube has been wanting me to watch this, but...

Youtube has been wanting me to watch this, but I'm not interested enough. I've got Natasha Owen's #1 hit on Loop.

Nobody teaches you this, but its "Mechanics Basics 101"...
Forum: Aerodynamics 03-18-2023, 01:09 AM
Replies: 39
Views: 3,515
Posted By Bigrigdave
Absolutely just a wild experiment. I was able to...

Absolutely just a wild experiment. I was able to take my 1986 Mercedes 300sdl from roughly 20 mpg to 38.8 a few years ago.

I then ran it on used engine oil, hydraulic fluid... Whatever I could get...
Forum: The Lounge 03-16-2023, 10:07 PM
Replies: 19
Views: 1,217
Posted By Xist
DIY an oil leach with a 2L soda bottle, tubing, and a shop vac!

In Chris Notap's second video he says to put the catch container inside the shop vac.

You make a funnel from the top of the bottle, cut a hole just big enough for the tubing, which you feed...
Forum: Aerodynamics 03-16-2023, 02:03 PM
Replies: 22
Views: 1,843
Posted By mjboks
Truck aero cap

I have been wanted to get an aero cap for my truck for a while now. I used the ecomodder tool to get an idea of what it should look like.

33576

.Here's the proof of concept from xps foam, glue...
Forum: Aerodynamics 03-07-2023, 02:03 PM
Replies: 59
Views: 4,057
Posted By Phase
Did a Julian Edgar style box cavity as a test on...

Did a Julian Edgar style box cavity as a test on back roads. Car felt less draggy. Wasn’t really able to flare the side inwards to reduce wake size and no hard measurements. But I was surprised it...
Forum: Aerodynamics 02-04-2023, 01:15 PM
Replies: 59
Views: 4,057
Posted By freebeard
https://ecomodder.com/forum/member-freebeard-album...

https://ecomodder.com/forum/member-freebeard-albums-pieces++parts-picture5248-lane57-wtrailer.jpg

There is a fine line betwixt the two.
Forum: Aerodynamics 01-19-2023, 05:51 PM
Replies: 35
Views: 1,897
Posted By Cd
https://ecomodder.com/forum/attachment.php?attachm...

https://ecomodder.com/forum/attachment.php?attachmentid=33230&stc=1&d=1674168430
https://ecomodder.com/forum/attachment.php?attachmentid=33231&stc=1&d=1674168461...
Forum: Aerodynamics 01-19-2023, 05:40 PM
Replies: 35
Views: 1,897
Posted By Cd
Failed segmented boattail experiment using drawer slides

I got as far as the last section of the tail, but I'm calling it quits on this project.

I just don't feel confident enough to drive with this.
I am no engineer, and the risk is too great for...
Forum: Aerodynamics 01-01-2023, 01:32 PM
Replies: 39
Views: 2,833
Posted By JDaly
Gas burned, carbon emitted

Another view:...
Forum: Aerodynamics 01-01-2023, 01:31 PM
Replies: 39
Views: 2,833
Posted By JDaly
The real costs of 80 vs 55 mph

I used krousdb and MetroMPG's marvelous Aerodynamic & rolling resistance calculator - EcoModder.com to compare my 2009 Prius at 55 and 80 and see what the real costs were. I visualized its results
...
Forum: Aerodynamics 12-12-2022, 12:05 PM
Replies: 1,084
Views: 256,988
Posted By aerohead
Dragging Bam's aero trailer back into the light

For those who are unacquainted with BamZipPow's one-wheel streamlined trailer, I'm dragging this thread back into the light, now that there's a nascent industry drying it's wings.:)
Forum: Aerodynamics 09-29-2022, 03:03 PM
Replies: 16
Views: 1,214
Posted By aerohead
Solo by Electra Meccanica

https://newatlas.com/electra-meccanica-solo-3-wheel-ev-production/55453/here's a link to a website offering some high-accuracy technical images for anyone following this 3-wheeler....
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