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Forum: Aerodynamics 11-22-2023, 03:03 AM
Replies: 37
Views: 2,517
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: EcoModding Central 11-21-2023, 09:45 AM
Replies: 432
Views: 81,459
Posted By MetroMPG
Ecky - no wheel skirts on the car. I only ever...

Ecky - no wheel skirts on the car. I only ever made cardboard templates that were on for a couple of weeks.

Sad to report I only used the car for about 5 weeks this fall, and didn't add any new...
Forum: Aerodynamics 11-18-2023, 07:26 AM
Replies: 37
Views: 2,517
Posted By bwilson4web
Pizza pan wheel cover testing

I'm going to call it a modest success:
https://ecomodder.com/forum/attachment.php?attachmentid=34342&d=1700310332


thin green line - suggests the pizza pan wheel covers provide up to ~4% at 70...
Forum: Aerodynamics 09-15-2023, 04:22 PM
Replies: 29
Views: 2,660
Posted By Frontier2307
I have used an app called 'Polycam' that uses...

I have used an app called 'Polycam' that uses photogrammetry to create 3D models from photos or videos (no fancy phone-lidar required!). It's free for the first 60 scans, and I've found it does a...
Forum: EcoModding Central 07-14-2023, 01:03 PM
Replies: 8
Views: 544
Posted By Piwoslaw
Aluminum is great at transferring heat. Remind...

Aluminum is great at transferring heat.
Remind me once more why no one has mentioned filling the gap with insulation?
That would reduce the temperature more than just an air gap.
Forum: EcoModding Central 07-13-2023, 11:46 AM
Replies: 7
Views: 430
Posted By freebeard
It's sold by the package, not linear feet.

It's sold by the package, not linear feet.
Forum: EcoModding Central 07-13-2023, 10:23 AM
Replies: 7
Views: 430
Posted By aerohead
'plastic belly pan'

Dr. Teddy Woll of Daimler-Benz, in 2014, wrote that the entire exhaust system of an internal combustion vehicle could be thermally insulated to facilitate enclosing the entire length of the...
Forum: EcoModding Central 07-12-2023, 08:31 PM
Replies: 7
Views: 430
Posted By freebeard
Coroplasst is for prototyping. ...

Coroplasst is for prototyping.

www.nudo.com/resources/p22_product_data.pdf (https://www.nudo.com/resources/p22_product_data.pdf)

Polymetal is laminated aluminum skins on a thermoplastic core....
Forum: EcoModding Central 07-12-2023, 01:54 PM
Replies: 7
Views: 430
Posted By freebeard
Yes. How much? Dunno. This makes it...

Yes. How much? Dunno.



This makes it sound like melting and burning are two different things. Maybe Coroplast is not fit for purpose? Maybe butt the two materials instead of layering them?
Forum: Aerodynamics 07-10-2023, 02:10 AM
Replies: 44
Views: 2,161
Posted By 2015LXFIT
Did he specify if this was with metal or plastic...

Did he specify if this was with metal or plastic gearing? I'm building one out at the moment, looking at the 54kG ones on Amazon with metal gears. Thanks.
Forum: Aerodynamics 07-05-2023, 07:47 PM
Replies: 44
Views: 2,161
Posted By freebeard
https://external-content.duckduckgo.com/iu/?u=http...

https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fwww.gerberequipment.com%2Fmedia%2Fcatalog%2Fproduct%2Fcache%2F1%2Fimage%2F9df78eab33525d08d6e5fb8d27136e95%2Fh%2F-%2Fh-s4550.jpg&f=1&nofb=1&...
Forum: Aerodynamics 07-02-2023, 09:45 AM
Replies: 44
Views: 2,161
Posted By Piotrsko
Back in he WW2 days, on the heavy bombers with...

Back in he WW2 days, on the heavy bombers with massive control surfaces there was a thing called an anti servo tab which one moves instead of move the control surface.
Forum: Aerodynamics 07-01-2023, 03:00 PM
Replies: 44
Views: 2,161
Posted By Piwoslaw
One more thing to keep in mind: Should the roof...

One more thing to keep in mind: Should the roof be reinforced to handle additional force at the point of mounting the air brake?
Forum: Aerodynamics 06-29-2023, 12:44 AM
Replies: 44
Views: 2,161
Posted By j-c-c
If the air brake adds any DF component when...

If the air brake adds any DF component when actuated, and if it's triggered by a brake application signal, I would think a gradual release control signal would be best for vehicle control and to...
Forum: Aerodynamics 06-27-2023, 09:41 AM
Replies: 44
Views: 2,161
Posted By Piotrsko
Or even really old school: an offset weight on a...

Or even really old school: an offset weight on a shaft that's free to rotate and activate a switching device in porportion to rotation. Brake controllers had this back in the '70s

Down side is it...
Forum: Aerodynamics 06-27-2023, 01:30 AM
Replies: 44
Views: 2,161
Posted By freebeard
An accelerometer to sense the force of the...

An accelerometer to sense the force of the braking, something the brake light is ignorant of.
Forum: Aerodynamics 06-27-2023, 12:23 AM
Replies: 44
Views: 2,161
Posted By 2015LXFIT
Hi, this is an excellent idea however, I think it...

Hi, this is an excellent idea however, I think it would be best fit with 2 side airfoils as well. I was considering engineering one for my 2015 Fit.

I think the proper way of doing it would be to...
Forum: Aerodynamics 06-21-2023, 07:35 PM
Replies: 1,306
Views: 163,168
Posted By freebeard
Unintentional or super-smart? ...

Unintentional or super-smart?

https://lh5.googleusercontent.com/-EAu4dg8NNeo/UQKsNYSRKjI/AAAAAAABkxo/FNcK4Hakfnc/s800/1956_Morelli_M-1000_01.jpg...
Forum: EcoModding Central 05-14-2023, 11:25 AM
Replies: 9
Views: 527
Posted By Blacktree
There are different schools of thought on that....

There are different schools of thought on that. I'm not sure if there's definitive proof either way. But here's my opinion, based on experience.

If you do the "slow and steady" thing, you may...
Forum: EcoModding Central 05-14-2023, 10:40 AM
Replies: 2
Views: 406
Posted By Blacktree
I'm not sure how cheap you're trying to go, but I...

I'm not sure how cheap you're trying to go, but I have a cheap GoPro wannabe camera, and have used it to film tuft testing on my car. The image quality was good enough for that. The audio quality is...
Forum: EcoModding Central 05-13-2023, 10:43 PM
Replies: 2
Views: 390
Posted By freebeard
Mods are asleep? Post memes. There is a...

Mods are asleep? Post memes.

There is a Contact Us button on the subforum main page. It looks promising:

ecomodder.com/forum/sendmessage.php (https://ecomodder.com/forum/sendmessage.php)
Forum: Aerodynamics 05-13-2023, 08:51 PM
Replies: 13
Views: 956
Posted By j-c-c
The saying to your dilemma reminds me of: "You...

The saying to your dilemma reminds me of:
"You can beat the rap, but not the ride"
comes to mind.
I once had a hearing regarding a no taillights ticket on a trailer.
Under cross-examination LEO...
Forum: Aerodynamics 05-13-2023, 08:19 PM
Replies: 6
Views: 571
Posted By freebeard
There spozta wuz.... ...

There spozta wuz....

https://ecomodder.com/forum/member-freebeard-albums-photoshops-picture6083-pickup-truck.png

Really more suited to a canopy or camper. But there's a single-wheel trailer and...
Forum: Aerodynamics 05-13-2023, 06:57 PM
Replies: 1,306
Views: 163,168
Posted By kach22i
https://aviation.stackexchange.com/questions/19281...

https://aviation.stackexchange.com/questions/19281/can-fuel-be-stored-in-the-anti-shock-bodies
https://i.stack.imgur.com/qHj9Z.jpg
Forum: Aerodynamics 05-11-2023, 09:38 PM
Replies: 6
Views: 571
Posted By j-c-c
Intuitively I suspect if airflow was originally...

Intuitively I suspect if airflow was originally laminar, it would increase drag, if not, it might reduce drag. I'm only guessing waiting for those above my paygrade to respond.
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