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Forum: Aerodynamics Today, 02:06 PM
Replies: 1
Views: 10
Posted By Logic
You need this software before dimples work

Sal Rodriguez a nuclear engineer at Sandia National Labs came up with software where you input:
1: Your shape. (eg: car body)
2: The 'fluid' (air) its moving through.
3: The speed at which its...
Forum: The Lounge Today, 01:11 PM
Replies: 544
Views: 29,042
Posted By Piotrsko
Feels like the '70's once again, only the fuzz...

Feels like the '70's once again, only the fuzz was too nice fer a change. Skip a generation and the youngins gotta redo everything we did, but worse and wrong. Seriously, Columbia? Really? West...
Forum: Events & Meet-ups Yesterday, 04:37 PM
Replies: 1
Views: 36
Posted By arcosine
HPV races may 4th major tayloe velodrome, indy

https://hosting.photobucket.com/images/g277/cfbb/IMG_3402.png
Forum: Aerodynamics Yesterday, 11:45 AM
Replies: 1,088
Views: 257,774
Posted By aerohead
' Bam's trailer '

Bam's trailer is hinged to a transverse spar, welded to the 2-inch 'male' pipe which engages the receiver hitch.
It articulates in 'pitch', dampened by duel air-springs.
Forum: Alternative Transportation Yesterday, 09:06 AM
Replies: 47
Views: 11,957
Posted By MetroMPG
It's actually a center stand - the left side of...

It's actually a center stand - the left side of it is hidden behind the right.

Same kind of stand as on the old CCM:
...
Forum: Aerodynamics 05-01-2024, 06:48 PM
Replies: 1,088
Views: 257,774
Posted By freebeard
BamZipPow's example is not articulated. I've...

BamZipPow's example is not articulated.

I've only seen one-wheel articulated trailers on motorcycles.
Forum: Aerodynamics 05-01-2024, 06:37 PM
Replies: 21
Views: 630
Posted By freebeard
...if you follow the recipe; it's difficult to...

...if you follow the recipe; it's difficult to respect ingress/egress, breakover angles and worst of all, rear view mirror requirements.
Forum: Aerodynamics 05-01-2024, 11:54 AM
Replies: 1,088
Views: 257,774
Posted By Logic
Erm... If you want to make an articulated 1...

Erm...

If you want to make an articulated 1 wheeled trailer (no castor wheel) your 'tow hitch should be a universal cross as found in driveshafts on rear wheel drive cars.

Now you have the...
Forum: Alternative Transportation 05-01-2024, 11:14 AM
Replies: 47
Views: 11,957
Posted By MetroMPG
I guess I've got the old bike hoarding sickness

I think I've traded hoarding old Metros for hoarding old bikes...

https://ecomodder.com/forum/attachment.php?attachmentid=34702&stc=1&d=1714575671

I've picked up half a dozen 50 - 75 year-old...
Forum: EcoModding Central 05-01-2024, 08:08 AM
Replies: 59
Views: 117,215
Posted By steve05ram360
Throttle response changes with heavier tires, the...

Throttle response changes with heavier tires, the same for lighter wheels. If you drive 400 miles (example) non stop on the hiway then there may not be an impact but over a mixed tank where your...
Forum: The Lounge 04-30-2024, 07:49 PM
Replies: 544
Views: 29,042
Posted By freebeard
I didn't recognize the reframing of the questions...

I didn't recognize the reframing of the questions because I didn't dwell on each one. Some tests give a better result if you give an initial reaction rather than over-thinking each answer. an example...
Forum: Aerodynamics 04-30-2024, 12:05 PM
Replies: 25
Views: 1,823
Posted By Phase
The air curtains on the new model 3 actually look...

The air curtains on the new model 3 actually look pretty good. Did they say what the drag coefficient is for the performance version? They mentioned better front splitter and rear diffuser too. I’m...
Forum: Aerodynamics 04-30-2024, 10:05 AM
Replies: 3
Views: 139
Posted By ennored
"The car chosen for this study is an urban...

"The car chosen for this study is an urban electric hatchback car, designed for Indian conditions." "Length(mm) 3280....."

The dimensions given match a Mahindra e2o:
...
Forum: Aerodynamics 04-30-2024, 04:23 AM
Replies: 25
Views: 1,823
Posted By Vekke
For some "reason" new model 3 performance has...

For some "reason" new model 3 performance has brought back the older looking air curtain style.

https://youtu.be/SsI8i1nfahs?si=0VQTF7BXWNPPngSc&t=152

So my estimate is that the new style from...
Forum: Aerodynamics 04-29-2024, 01:52 PM
Replies: 20
Views: 1,722
Posted By CigaR007
Did a 30-mile loop yesterday. Ambient air...

Did a 30-mile loop yesterday. Ambient air temperature was around 16 deg C and the coolant was stable at 95 deg C with the grille shutter half-open.

Pretty sure the grille shutter will need to be...
Forum: The Lounge 04-29-2024, 01:49 PM
Replies: 26
Views: 1,691
Posted By freebeard
1) It's at ?t=628...

1) It's at ?t=628 (https://youtu.be/T2Sn9QG68WI?t=628). Ultrawhite paint is 88.6%, a silvered mirror is 89.5%.

2) Don't know

3) [citation needed]

4) Disagree. It's reflecting the heat load...
Forum: General Efficiency Discussion 04-29-2024, 11:26 AM
Replies: 10
Views: 196
Posted By aerohead
' 20% '

I'm not current on Diesels, as I've lost interest in internal combustion, but the last time I looked, the most efficient diesels were in ocean-going cargo ships.
The one reported, was manufactured...
Forum: Aerodynamics 04-29-2024, 11:06 AM
Replies: 3
Views: 139
Posted By aerohead
SAE International, 2022-28-0509 ( Aer0 vs Range)

Delta-10% drag = Delta 5% range on BEVs.
https://www.sae.org/publications/technical-papers/content/2022-28-0509/...
Forum: Aerodynamics 04-29-2024, 10:29 AM
Replies: 7
Views: 211
Posted By aerohead
' blame '

I blame him too!
He's just a !*$*&#+?~!! buzzkill.;)
Forum: Aerodynamics 04-29-2024, 02:49 AM
Replies: 15
Views: 4,803
Posted By Vekke
With so little 1/3" 8,5mm protrusion no impact...

With so little 1/3" 8,5mm protrusion no impact that you could measure to consumption. Maybe sound might be a problem but test will show is there any sounds coming.

I currently have no stock to...
Forum: The Lounge 04-28-2024, 06:00 PM
Replies: 544
Views: 29,042
Posted By freebeard
I think that link at #517 is corrupted. This...

I think that link at #517 is corrupted.

This system doesn't have the GIMP installed or I'd crop a screen shot.

I see that the X axis is economic. What would a collective/sovereign axis be...
Forum: The Lounge 04-28-2024, 04:29 PM
Replies: 26
Views: 1,691
Posted By freebeard
Here is a metamaterials approach: This Material...

Here is a metamaterials approach:
This Material Might Change How We Cool Our Houses Forever (https://www.youtube.com/watch?v=T2Sn9QG68WI)
A self-assembling aluminum foam. I should think that would...
Forum: EcoModding Central 04-28-2024, 10:54 AM
Replies: 34
Views: 4,331
Posted By Logic
Ye; like that but ALSO with sucking at the...

Ye; like that but ALSO with sucking at the trailing edge of the upper wing surface..

ie: That blown air is directed/pointed towards a facing suction nozzle/slot of some sort, located very close...
Forum: The Lounge 04-28-2024, 10:01 AM
Replies: 544
Views: 29,042
Posted By sgtlethargic
I don't put much weight into this.

I don't put much weight into this.
Forum: General Efficiency Discussion 04-28-2024, 04:43 AM
Replies: 10
Views: 196
Posted By jakobnev
Maybe I'm reading the charts wrong, but @2100rpm...

Maybe I'm reading the charts wrong, but @2100rpm there was 30%(?) increase in power with 6% improvement in BSFC, which means 23% more fuel was injected. It's not apples to apples and if you don't...
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