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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-21-2020, 01:53 PM   #21 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,648
Thanks: 26
Thanked 2,390 Times in 1,675 Posts
Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
I guess you would want to take a look at the current generation of Marcopolo urban transit buses in order to get some inspiration for aero mods.

Hotsite - Comienzo - MP 60 BRS - Marcopolo Ônibus
I was hoping for more from them, no box cavity, still has wheel flares, and those front corners could stand to be more rounded in my opinion.

Is that a city bus or a highway cursing bus design?

We should perhaps be looking a long distance highway cruisers, yes?

I did find the below doing a search on the topic, looks like they did more to the fronts than the rears, which is not very encouraging.

Aerodynamic Exterior Body Design of Bus
https://www.ijser.org/paper/Aerodyna...gn-of-Bus.html

Quote:
6 CONCLUSION

Four different prototypes have been fabricated for performing experimental and numerical analysis using wind tunnel and CFD software. The Bus No.1 is the existing model, Bus No.2 is the existing model with the rear end modified, Bus No.3 is the existing bus with the front end modified and Bus No.4 is the model with modification at front and rear end..........
EDIT:

This is cool.

Teardrop Cars
CLASSIC CARS
Aerodynamically, the shape of a drop of water faces the least air resistance, so in the years running up to the Second World War, numerous ŠKODA vehicles strove to replicate this “teardrop” look.
https://www.skoda-storyboard.com/en/...teardrop-cars/

Quote:
The 532 and 536 bus prototypes also featured aerodynamic rear sections. The triple-axle 532 with independent suspension on all wheels was particularly impressive. Its rear-mounted engine was separated from the 35-seater passenger compartment by a soundproofed partition and could be reached via a hatch. The wheels on both rear axles were skirted for improved aerodynamics. The upcoming war, however, halted the development of these prototypes.
AUTOCULT - SKODA - 532 AUTOBAHNBUS CZECH REPUBLIC AUTOBUS 1938
https://www.carmodel.com/autocult/at...us-1938/128098




__________________
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; 11-21-2020 at 02:09 PM..
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-21-2020, 02:39 PM   #22 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 17,567
Thanks: 4,741
Thanked 5,847 Times in 4,664 Posts
These are all nice, but is it known how much length can be added to a 40ft bus? Maybe five feet?

The hardest limitation is the right front corner. Maybe the door could be modified to something like the GMC Motorama trucks.


https://i.pinimg.com/originals/aa/29...2d8fd75252.jpg[/URL][/URL]
__________________
.

Andrej Karpathy: If you bombard Earth with photons long enough eventually it will emit a Tesla.

_________________
  Reply With Quote
Old 11-21-2020, 03:51 PM   #23 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,648
Thanks: 26
Thanked 2,390 Times in 1,675 Posts
https://ecomodder.com/forum/showthre...ure-33061.html
Quote:
Many of the European Cabin Over Engine racing trucks have these corner features.
Apparently, they are eliminating the vertical foils at corners and or scoops normally found on European racing trucks (see below).

https://www.eurotransport.de/artikel...-11170089.html




May 8, 2013
Scania - Streamline Aerodynamics


Leading Edge Radius
https://www.sciencedirect.com/topics...ng-edge-radius


https://www.jstor.org/stable/44718757?seq=1
__________________
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; 11-21-2020 at 04:11 PM..
  Reply With Quote
The Following User Says Thank You to kach22i For This Useful Post:
aerohead (Yesterday)
Old 11-22-2020, 01:01 PM   #24 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 1,380
Thanks: 131
Thanked 382 Times in 321 Posts
Legally I think it's 65ft for any vehicle. 40ft is the arbitrary length for non articulated to make typical street corner right turns in a city without running onto the opposing traffic lane, left turns in Britain.
  Reply With Quote
The Following User Says Thank You to Piotrsko For This Useful Post:
freebeard (11-22-2020)
Old 11-22-2020, 01:53 PM   #25 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 17,567
Thanks: 4,741
Thanked 5,847 Times in 4,664 Posts
No doubt it varies by jurisdiction, my recollection is 45ft for a single vehicle and 65ft for any combination, up to three trailers.
__________________
.

Andrej Karpathy: If you bombard Earth with photons long enough eventually it will emit a Tesla.

_________________
  Reply With Quote
Old 11-26-2020, 06:12 PM   #26 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 8,459
Thanks: 0
Thanked 918 Times in 813 Posts
Quote:
Originally Posted by kach22i View Post
Is that a city bus or a highway cursing bus design?

We should perhaps be looking a long distance highway cruisers, yes?
That's a city bus, yet it seems to have been inspired by the Marcopolo highway cruisers.
  Reply With Quote
Old 11-27-2020, 10:01 AM   #27 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,648
Thanks: 26
Thanked 2,390 Times in 1,675 Posts
Some retro inspiration.

Random TRANSPORTATION pictures - Page 2412 - Pelican Parts Forums
__________________
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 Yesterday, 11:52 AM   #28 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 11,786
Thanks: 18,992
Thanked 6,098 Times in 3,740 Posts
magic radii

Quote:
Originally Posted by kach22i View Post
https://ecomodder.com/forum/showthre...ure-33061.html


Apparently, they are eliminating the vertical foils at corners and or scoops normally found on European racing trucks (see below).

https://www.eurotransport.de/artikel...-11170089.html




May 8, 2013
Scania - Streamline Aerodynamics


Leading Edge Radius
https://www.sciencedirect.com/topics...ng-edge-radius


https://www.jstor.org/stable/44718757?seq=1
Hucho commented that, during development of the VW Vanagon, in 1969, when tested at full-scale, flow could remain attached with smaller radii than in scale-model testing. 5% of the square-root of frontal area was sufficient.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old Yesterday, 01:41 PM   #29 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,648
Thanks: 26
Thanked 2,390 Times in 1,675 Posts
Quote:
Originally Posted by aerohead View Post
.......... 5% of the square-root of frontal area was sufficient.
Thank you.

It can be more complex than that with side view mirrors, visors, radiator grilles and so forth mucking things up, at least that's my walk away from the video.

And what ever you do, don't crack open a window.

__________________
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 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com