Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-11-2011, 01:52 PM   #51 (permalink)
Master EcoModder
 
Sven7's Avatar
 
Join Date: Aug 2011
Location: Warren, MI
Posts: 2,456

Boo Radley - '65 Ford F100
90 day: 13.28 mpg (US)
Thanks: 782
Thanked 661 Times in 405 Posts
The full roof opening up could be interesting but I doubt they'd do it based on the fact that rain could get in. Yes, there are ways around this including a rubber bellows that opens in the space between the roof and trailer wall. But I don't think they would put something like that into production... would they?

Anyway hopefully they have designers like me to overcome these obstacles

__________________
He gave me a dollar. A blood-soaked dollar.
I cannot get the spot out but it's okay; It still works in the store
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-11-2011, 09:16 PM   #52 (permalink)
Master EcoModder
 
larrybuck's Avatar
 
Join Date: Apr 2011
Location: sw Washington (state), a little north of Vancouver
Posts: 1,043
Thanks: 277
Thanked 77 Times in 60 Posts
The easiest way I see to quickly at a loading dock to get Bubble-butt, or almost any rear extension would to have it be able to be quicklyraised like a car's hatchback, and then slide forward, and lock into position atop the trailer roof.

Most current docks would have better height clearance then fiddling w something that hinges to the sides, and takes up room.
It would just be a 20second thing added to the normal openings of the dual doors anyway!

My first thought when I saw these futuristic trucks w the ultra high driving perch was: I wonder how many joints there are in the steering!!!
  Reply With Quote
Old 12-12-2011, 09:56 AM   #53 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 2,793
Thanks: 3
Thanked 1,776 Times in 1,250 Posts
Quote:
Originally Posted by larrybuck View Post
My first thought when I saw these futuristic trucks w the ultra high driving perch was: I wonder how many joints there are in the steering!!!
I don't know about +20 years ago, but I would guess that a GM style of electric steering could be employed now.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Old 12-12-2011, 11:41 AM   #54 (permalink)
EcoModder
 
Join Date: Jul 2008
Location: North Central Alabama
Posts: 569

Big Salsa - '04 Toyota Sienna LE

Silver - '10 Toyota Prius III
Thanks: 106
Thanked 116 Times in 67 Posts
Quote:
Originally Posted by Shepherd777 View Post
Hi Wyatt -

Thanks for the kind words regarding following through.

Actually, what you are calling the "Bubble Butt" was the most aerodynamically clean boat-tail that our SolidWorks FloWorks CFD program has ever produced on a 53' dry van freight trailer.

I do have press releases, build pics, and a web site on the 1983 truck and the current SuperTruck being built. The SuperTruck is not finished yet, but we hope it will be ready for testing next month. So I'll probably start a seperate thread on the project in this aero forum of EcoModder, even though we use, like most folks here, more than just aero to get optimum fuel mileage. I just wanted to wait a little before revealing more details. If I get too involved and spend too much time in posting and replying to questions, I'll never get the damn truck finished.
By "aerodynamically clean" do you mean "lowest drag"? If so, I would be really surprised. I wonder how good of a job the CFD does. I haven't worked with it in a few years, but the one I used back then was very good in the "stress/strain" realm, and very bad in the "fluid flow" realm (it could be tricked into almost anything). I suppose things have come a long way since then, but I know NASA still backs up all CFD work with wind tunnel testing to ground their models, and if you have the means, a small scale wind tunnel test might not be a bad idea (if you haven't already).
Be sure to post a link to the new thread when you start one, I would be interested in following.
__________________
  Reply With Quote
Old 12-12-2011, 12:27 PM   #55 (permalink)
Master EcoModder
 
euromodder's Avatar
 
Join Date: Jul 2010
Location: Failed State Belgium
Posts: 4,428

GasDwarf - '13 Volkswagen up! EcoFuel CNG
Thanks: 151
Thanked 546 Times in 431 Posts
Quote:
Originally Posted by kach22i View Post
Anyone else see a little XB-70 in the design above?
I see a lot of wasted length & space in the Colani designs..

On this side of the pond, with its crowded cities and villages and more stringent limitations - legal and practical - on truck length, just about all tractors are cab-over-engine.
__________________
GasDwarf's fuel consumption :
  Reply With Quote
Old 12-12-2011, 02:29 PM   #56 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 2,793
Thanks: 3
Thanked 1,776 Times in 1,250 Posts
Quote:
Originally Posted by euromodder View Post
On this side of the pond.......... just about all tractors are cab-over-engine.
I've noticed that, and that they race them, and are quite creative in getting some aero out of the designs using air-curtains and the like.

Adding to what other have pointed out, that it's the rear not the front which counts the most, and that we might be stuck with a box of certain length and floor height for quite some time. I have to say that attention/discussion is warranted for those edge of box add-on's such as vortex generators and removable tail cones.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Old 12-16-2011, 06:16 AM   #57 (permalink)
EcoModding Lurker
 
Join Date: Dec 2011
Location: Bulgaria
Posts: 1
Thanks: 0
Thanked 1 Time in 1 Post
da i az sam na sashtoto mnenie. radvam se che tuk moga da se zapoznaq detailno s dosta intersni neshta
  Reply With Quote
The Following User Says Thank You to key_key For This Useful Post:
Frank Lee (12-20-2011)
Old 12-16-2011, 08:23 AM   #58 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 2,793
Thanks: 3
Thanked 1,776 Times in 1,250 Posts
I trust that most everyone will see this post as "on topic".

Efficient Utilitarian Truck Looks Good.............November 29, 2011
Efficient Utilitarian Truck Looks Good | New Energy and Fuel
Quote:
Mercedes has pushed for a working group of truck and trailer manufacturers under the umbrella of the German Association of the Automotive Industry, which has carried out further tests on the aerodynamics of semi-trailer tractors. Within the framework of the study, measurements in the wind tunnel at Mercedes-Benz concluded that modifications to the cab such as a supposedly aerodynamic extension result in merely minimal improvements where wind resistance is concerned.

They also learned there is much more potential in aerodynamic measures at the tail end of the trailer; a minor extension of the tail end in the form of a “boat tail” brings significant benefits. Four flaps measuring just 400 mm in length and positioned at an angle reduce the wind resistance of the entire semi-trailer tractor by nearly 10%. In arithmetical terms this corresponds to virtually 3% less fuel consumption or more than 1,000 liters of diesel a year. This is also shown by the simulations, which have been carried out for the aero trailer.

__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Old 12-16-2011, 08:25 AM   #59 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 2,793
Thanks: 3
Thanked 1,776 Times in 1,250 Posts
Did anyone else notice that the side skirts vent a little to the tail?
.................................................. .................................

Virgin's teardrop lorries?

Click link to view video:
Virgin Media Sustainability - The Little Red Box

Here, this is better (the real thing - not a cartoon):
Aerodynamic Teardrop Trailer


Don-Bur Launch The Teardrop MK2


Jumpy little site ain't it?
Trailer Aerodynamics


Quote:
Fuel consumption is primarily attributable to 3 things: (1) resistance to inertia, (2) rolling resistance and (3) aerodynamics.
DON-BUR'S "EcoStream" Aerodynamic Curtainsided Double Deck Trailer Under Test
EcoStream Under Test




DON-BUR: DeckStreamer

Quote:
Despite the recognised 10-18% fuel saving attributable to the EcoStream, there is an unavoidable loss of load-space. For those operators who are normally able to max-fill the area over the swan-neck, an EcoStream profile lowers the maximum potential.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html

Last edited by kach22i; 12-16-2011 at 08:47 AM..
  Reply With Quote
Old 12-20-2011, 11:47 AM   #60 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 2,793
Thanks: 3
Thanked 1,776 Times in 1,250 Posts
Another "add" to the list of aero-trucks.

Mobile Surgical Services Freightliner
Mobile Surgical Services Freightliner
Quote:
This radical looking truck is actually a 2001 Freightliner Argosy which has had an eXtreme makeover. Hard to believe when it looks like something from the future! The front of the truck was designed and made in New Zealand.




I've seen those "Air Curtain" type things on some European racing trucks.

__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com