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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-10-2018, 09:17 AM   #2881 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
Quote:
Originally Posted by samwichse View Post
Those big honking exhaust pipes are actually exhaust electors, basically venturis that act something like the "air multiplier" on those Dyson bladeless desk fans to suck air though the engine. Voila, an extra chunk of HP not used by the cooling system!
That's got to have some limitations, otherwise it's use would have been more widespread, right?

2013
Giving Your Fleet an Aerodynamic Advantage
https://www.fleetio.com/blog/giving-...amic-advantage


Quote:
You can already see the widespread advancement of aerodynamics by major manufacturers. New models by Ford, GM, and Volvo are sporting thoughtfully designed features like front grill shutters, streamlined mirror covers and enhanced ground effects.

For tractor trailers, there are a number of add-ons that can make the rig slicker going down the road. These include side skirts, rear covers and fairings - all having the objective of keeping the air flow as laminar (non-turbulent) as possible. You will see a lot of focus on decreasing wheel exposure, as spinning air surrounding them creates a profile much larger frontal area than the tire size implies.

__________________
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
The Following User Says Thank You to kach22i For This Useful Post:
aerohead (11-14-2018)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-10-2018, 02:55 PM   #2882 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,561
Thanks: 7,736
Thanked 8,554 Times in 7,041 Posts
Quote:
Originally Posted by samwichse
Sort of in the realm of aerodynamics...
Aerodynamics isn't just for the outside.

Thanks for posting that. The only example I knew of was a b&w photo in Popular Mechanix Illustrated in the 1960s. I'd never found it again. It was a Porsche racer in the 1950s and had large boxes behind each rear wheel. Probably not popular because... no muffler.

I believe Beetle produce about 1500cfm of exhaust and 1500cfm of hot air. My design has a megaphone header with an upturn into a bell Coanda nozzle at the back of the boat tail:

__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (11-14-2018)
Old 11-13-2018, 12:59 PM   #2883 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,475
Thanked 2,950 Times in 1,844 Posts
I forget whether or not the Rimac C2 has been included on this thread, yet, or not.





__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
The Following User Says Thank You to NeilBlanchard For This Useful Post:
aerohead (11-14-2018)
Old 11-14-2018, 09:03 AM   #2884 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
Quote:
Originally Posted by NeilBlanchard View Post
I forget whether or not the Rimac C2 has been included on this thread, yet, or not.
I don't remember either, but it is cool - and looks to be aerodynamic despite the many air inlets and rear wing.
__________________
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 11-17-2018, 07:10 PM   #2885 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
105 lbs, 901 mpg built by High School students. I found it posted in a Timber Frame forum in the O.T. section (forestryforum.com).

Nov 9, 2016
901 MPG Car Built by High School Students (Elroy1)
https://www.youtube.com/watch?time_c...&v=dmcRHtIQ4jA
Quote:
901 MPG Car Built by High School Students The Evansville, Indiana High School entry for the Shell Eco Marathon performed at an efficiency of 901 miles per gallon of gasoline in the 2016 Eco Marathon this year. It also placed 4th Globally! Congratulations guys! Stay tuned for the BFATE for some special guests and some drift-car action!
April 14, 2015
A different kind of hot-rodding: 2015 Shell Eco-marathon brings hyper-efficiency to Detroit
The 3,421-mpg car is here, and it was built by students
https://autoweek.com/article/car-new...ciency-detroit

Quote:
We loved the streamlined look of the Elroy, a gasoline-powered urban concept from team Mater Dei Supermileage from Mater Dei High School, Evansville, Ind. Photo by Shell Eco-marathon
https://www.autoblog.com/photos/shel...#slide-2589106



https://www.facebook.com/11526186189...3053565446641/
__________________
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; 11-17-2018 at 07:20 PM..
  Reply With Quote
The Following 3 Users Say Thank You to kach22i For This Useful Post:
aerohead (11-20-2018), freebeard (11-19-2018), NeilBlanchard (11-20-2018)
Old 11-17-2018, 07:37 PM   #2886 (permalink)
Master Ecomadman
 
arcosine's Avatar
 
Join Date: Nov 2010
Location: Chicago area
Posts: 1,149

sc1 - '98 saturn sc1
Team Saturn
90 day: 43.17 mpg (US)

Airplane Bike - '11 home built Carp line Tour

rans - '97 rans tailwind

tractor - '66 International Cub cadet 129

2002 Space Odyssey - '02 Honda Odyssey EX-L
90 day: 28.25 mpg (US)

red bug - '00 VW beetle TDI

big tractor - '66 ford 3400

red vw - '00 VW new beetle TDI
90 day: 58.42 mpg (US)

RV - '88 Winnebago LeSharo
90 day: 16.67 mpg (US)
Thanks: 20
Thanked 333 Times in 225 Posts
There's a you tube video on that. Its very loud with the megaphone exhaust...


Quote:
Originally Posted by samwichse View Post
Sort of in the realm of aerodynamics...

Tatra made a V8 T603 race car, and removed the parasitic load of the cooling fans from the air-cooled engine.

How did they keep it cool, you might ask?

Those big honking exhaust pipes are actually exhaust extractors, basically venturis that act something like the "air multiplier" on those Dyson bladeless desk fans to suck air though the engine. Voila, an extra chunk of HP not used by the cooling system!

https://www.carthrottle.com/post/wybmg98/

I always wondered if someone could run something similar on a air-cooled VW engine.
__________________
- Tony

  Reply With Quote
Old 11-18-2018, 07:45 AM   #2887 (permalink)
Master EcoModder
 
sendler's Avatar
 
Join Date: May 2011
Location: Syracuse, NY USA
Posts: 2,935

Honda CBR250R FI Single - '11 Honda CBR250R
90 day: 105.14 mpg (US)

2001 Honda Insight stick - '01 Honda Insight manual
90 day: 60.68 mpg (US)

2009 Honda Fit auto - '09 Honda Fit Auto
90 day: 38.51 mpg (US)

PCX153 - '13 Honda PCX150
90 day: 104.48 mpg (US)

2015 Yamaha R3 - '15 Yamaha R3
90 day: 80.94 mpg (US)

Ninja650 - '19 Kawasaki Ninja 650
90 day: 72.57 mpg (US)
Thanks: 326
Thanked 1,315 Times in 968 Posts
A slightly larger version of this car is where we should be headed. Tandem seating. Normal compact car track. Standard bumper height. All wheel drive hub motors. Top speed of 80mph. NO radar, cameras, or airbags.
.
We are wasting resources to mandate safety and self driving to the point where every car must be 2,000 kg with a 500 kg battery and cost $40,000.
.
.

.
.
  Reply With Quote
The Following 3 Users Say Thank You to sendler For This Useful Post:
aerohead (11-20-2018), Joggernot (11-18-2018), NeilBlanchard (11-20-2018)
Old 11-19-2018, 01:26 PM   #2888 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
Quote:
Originally Posted by sendler View Post
A slightly larger version of this car is where we should be headed...............
I admire this design in that it somewhat relieves overhang anxiety.

That is to say, it is very difficult to package humans, drive systems and aerodynamics all into one.

One of the reasons is that either the wheelbase becomes super long or the front and rear overhangs do. And sometimes both at the same time.

This tiny car negates some of those factors by completely enclosing the front and rear wheels, so the overhang isn't as noticeable and in your face.

It still comes off looking somewhat like a float in a parade, but it's a nice parade on the study of aerodynamics.
__________________
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 11-19-2018, 01:38 PM   #2889 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
it's a very nice Jaray interpretation.
__________________


  Reply With Quote
The Following 2 Users Say Thank You to Frank Lee For This Useful Post:
aerohead (11-20-2018), freebeard (11-19-2018)
Old 11-20-2018, 11:40 AM   #2890 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
tandem

Quote:
Originally Posted by sendler View Post
A slightly larger version of this car is where we should be headed. Tandem seating. Normal compact car track. Standard bumper height. All wheel drive hub motors. Top speed of 80mph. NO radar, cameras, or airbags.
.
We are wasting resources to mandate safety and self driving to the point where every car must be 2,000 kg with a 500 kg battery and cost $40,000.
.
.

.
.
The Cd 0.156, 2006 VW 1-liter car was their inspiration.

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
NeilBlanchard (11-20-2018)
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric Cars Push Japan Engine Parts Makers to Crisis Mode tjts1 The Lounge 14 12-23-2012 12:47 PM
Name that Eco Car! Quiz: identify these aerodynamic production cars MetroMPG Aerodynamics 16 08-30-2009 05:24 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com