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Search took 0.06 seconds. Search: Posts Made By: Bigrigdave
Forum: Aerodynamics 06-26-2023, 10:46 PM
Replies: 39
Views: 3,524
Posted By redpoint5
Curious what the impact of the cattle guard might...

Curious what the impact of the cattle guard might be? In general, front aero features aren't as impactful as rear.
Forum: Aerodynamics 06-26-2023, 10:13 AM
Replies: 39
Views: 3,524
Posted By JSH
That depends on the application. Some fleets...

That depends on the application. Some fleets own their trailers - some just move other people's trailers. Companies like UPS, FedEx, and Walmart own their trailers and only move their own freight....
Forum: Aerodynamics 06-26-2023, 12:53 AM
Replies: 39
Views: 3,524
Posted By freebeard
Don't the tractors have to take all trailers that...

Don't the tractors have to take all trailers that come along? Or do they come in matched sets like that?
Forum: Aerodynamics 06-26-2023, 12:12 AM
Replies: 39
Views: 3,524
Posted By JSH
Freightliner's Supertruck 1? ...

Freightliner's Supertruck 1?
...
Forum: Aerodynamics 06-24-2023, 05:24 PM
Replies: 39
Views: 3,524
Posted By JSH
While I haven't had a chance look up your VIN yet...

While I haven't had a chance look up your VIN yet your recent pictures tell me a lot.

#1 mod is to unbolt that huge bumper / grill guard and sell it to someone that wants to kill their fuel...
Forum: Aerodynamics 06-24-2023, 01:53 PM
Replies: 39
Views: 3,524
Posted By freebeard
There was a thread that compared Moon, open...

There was a thread that compared Moon, open centers and slots around the rim; and those open centers gave 80% benefit IIRC.
Forum: Aerodynamics 10-04-2022, 10:53 AM
Replies: 39
Views: 3,524
Posted By Piotrsko
All these mirrors hanging out everywhere are a...

All these mirrors hanging out everywhere are a newer thing, probably a great idea. Drivers lived for years without them, but poophowdy, does it make doing some tasks slick and easy and beats getting...
Forum: Aerodynamics 09-21-2022, 05:20 PM
Replies: 39
Views: 3,524
Posted By freebeard
Got it. Lurkers are important. I don't care...

Got it. Lurkers are important.

I don't care enough to search but there were wheel disks that expand like a crochet hoop to grip the wheel. Maybe they could be moved from one trailer to the next.
Forum: Aerodynamics 05-26-2022, 03:19 PM
Replies: 218
Views: 24,190
Posted By ennored
Aero RV

If it's been mentioned in this thread, I missed it.

A good example of a boat tail on a motorhome was done by user Orbywan a few years back. Did you review his build and results?
...
Forum: Aerodynamics 05-26-2022, 03:15 PM
Replies: 218
Views: 24,190
Posted By aerohead
belly pan

If you can locate orbywan's old RV posts, you might find time-saving tricks he used. He got his Ford MH up to 14.5-mpg.
Forum: Aerodynamics 05-23-2022, 03:33 PM
Replies: 218
Views: 24,190
Posted By aerohead
rigid bottom

1) It will help stabilize the entire envelope.
2) A light-kit could be integrated into it. Traffic near you need to see your functions from all vantage points.
3) And likely, the rear license...
Forum: Aerodynamics 05-23-2022, 03:07 PM
Replies: 218
Views: 24,190
Posted By sregord
A series of 3- 12+" sections ..ala "Mercedes IAA...

A series of 3- 12+" sections ..ala "Mercedes IAA concept:"or tri-fold closet doors- seems a bit complicated...problematic
...which brings me back to Freebeard's original idea (Post#12).
The MH has...
Forum: Aerodynamics 05-23-2022, 02:01 PM
Replies: 218
Views: 24,190
Posted By freebeard
The Zeppelin aeroform is not as pertinent as the...

The Zeppelin aeroform is not as pertinent as the work Mair did on torpedoes.

https://ecomodder.com/forum/member-freebeard-albums-aero+technical-picture4769-user322-pic97-1215134663.jpg

You have...
Forum: Aerodynamics 05-23-2022, 01:46 PM
Replies: 218
Views: 24,190
Posted By aerohead
16-feet

I believe that boat-tail length is capped @ 48-inches, unless its inflatable, then you've got 60-inches to work with.
Since the MH has the more narrow 'width' dimension, all geometry for the tail...
Forum: Aerodynamics 05-23-2022, 12:25 PM
Replies: 218
Views: 24,190
Posted By aerohead
raided

Last two times I attempted to share images, there was no longer the 'MANAGE ATTACHMENTS' button to use.
Not sure what's happened.
Forum: Aerodynamics 05-23-2022, 12:20 PM
Replies: 218
Views: 24,190
Posted By freebeard
I've never understood the attraction of...

I've never understood the attraction of attachments. I raided your albums:
...
Forum: Aerodynamics 05-23-2022, 10:37 AM
Replies: 218
Views: 24,190
Posted By aerohead
inflatable

I can testify that even 'mediocre' inflatable tails will show at the gas pump or charging station.
I'd link a photo, but the 'manage attachments' no longer exists.
Forum: Aerodynamics 05-20-2022, 01:44 AM
Replies: 218
Views: 24,190
Posted By redpoint5
I've thought an inflatable aero treatment made...

I've thought an inflatable aero treatment made the most sense.

Make it so it's foolproof and easy, that lazy slobs will still be compliant.

Make it with relief valves so lazy forgetful slobs...
Forum: Aerodynamics 05-20-2022, 12:56 AM
Replies: 218
Views: 24,190
Posted By Drifter
Yokohama has a calculator of their own: ...

Yokohama has a calculator of their own: https://www.yokohamatruck.com/tire-tools/fuel-savings-calculator

Looks like they list their 023, 101, 108, 109, 114, 517, 617, 703, 709, 712, and 715 tires...
Forum: Aerodynamics 05-19-2022, 07:09 PM
Replies: 218
Views: 24,190
Posted By freebeard
Mercedes IAA concept: ...

Mercedes IAA concept:
https://i.kinja-img.com/gawker-media/image/upload/s--X4fBb6ck--/c_fit,fl_progressive,q_80,w_636/1431586686742354834.gif...
Forum: Aerodynamics 05-12-2022, 12:23 AM
Replies: 218
Views: 24,190
Posted By Drifter
If you've got random tires on it, you might gain...

If you've got random tires on it, you might gain 10% mpg just from switching to the loweat rolling resistance models. Michelin has a calculator to see what percentage change in rolling resistance...
Forum: Aerodynamics 05-11-2022, 11:12 PM
Replies: 218
Views: 24,190
Posted By freebeard
https://www.rvtrader.com/listing/1999-Rexhall-AERB...

https://www.rvtrader.com/listing/1999-Rexhall-AERBUS-XL3100-5016435059https://cdn2.rvtrader.com/v1/media/609981667212865ef3288e19.jpg?

Is there a question? I don't see a lot of opportunity --...
Forum: Aerodynamics 11-15-2020, 02:13 PM
Replies: 218
Views: 24,190
Posted By freebeard
Welcome to Ecomodder. Time is either...

Welcome to Ecomodder.

Time is either speeding up or stretching out —I don't remember the post at #10 at all.

I watched the video again and what stood out this time was the inflating mechanism...
Forum: Aerodynamics 10-12-2020, 03:26 PM
Replies: 218
Views: 24,190
Posted By sregord
I know this is a really old thread...

...I found something that could be applicable in more than this.
A german company was testing what is called a Trucksack. Company seems to have moved on, but here is the youTube showing the test...
Forum: Aerodynamics 04-06-2020, 07:10 PM
Replies: 8
Views: 1,091
Posted By Chonk_Master
I working on very thin aluminum pizza trays that...

I working on very thin aluminum pizza trays that will be bolted to the lugnuts. Each one cost about $4. The lugnuts will be drilled and threaded on top.
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