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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-28-2019, 04:26 AM   #321 (permalink)
EcoModding Apprentice
 
Bicycle Bob's Avatar
 
Join Date: May 2008
Location: N. Saskatchewan, CA
Posts: 1,805

Appliance White - '93 Geo Metro 4-Dr. Auto
Last 3: 42.35 mpg (US)

Stealth RV - '91 Chevy Sprint Base
Thanks: 91
Thanked 460 Times in 328 Posts
Official "flying wires" are flat, and not even coiled for shipping. There is a problem with flutter if they get too streamlined, though. Helicopter blades carry heavy ballast in the leading edge to keep them stable. One of the Kremer prizes was won by a flight with a pair of the thin piano wires left off, running from mid-wing forward.
What always astounds me, however, are all the round-section rollover bars on race cars. They are often extra-tall and wide, yet poorly braced, and with no attempt at streamlining. A foam fairing of the shape shown above would not be hard to do, and even a simple cardboard tail taped on would more than halve the drag. Even terrible paint would help, like the dimples on a golf ball. There are often other round bits hanging out in the breeze, too. Both the Goldenrod and Challenger used the same truck axle which left a large stub sticking out of the hub. The stubs could have been streamlined with a fairing on a bearing, like those non-rotating bling-bling wheel covers.

__________________
There is no excuse for a land vehicle to weigh more than its average payload.
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-28-2019, 09:59 AM   #322 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,179
Thanks: 127
Thanked 2,802 Times in 1,968 Posts
Quote:
Originally Posted by Vman455 View Post
Came across these images on Slowtwitch the other day. These two objects are acted on by the same drag force at a given velocity:
Butter Beans.

Seriously?

So the other day I emptied the contents of a tall skinny class into a much larger short fat glass..................they held the same amount it turns out.

I still get awoken by these long known facts once in a while.

You woke me today Vman.
__________________
George
Architect, Artist and Designer of Objects

2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

You cannot sell aerodynamics in a can............
  Reply With Quote
Old 05-28-2019, 05:55 PM   #323 (permalink)
Moderator
 
Vman455's Avatar
 
Join Date: Feb 2012
Location: Urbana, IL
Posts: 1,939

Pope Pious the Prius - '13 Toyota Prius Two
Team Toyota
SUV
90 day: 51.62 mpg (US)

Tycho the Truck - '91 Toyota Pickup DLX 4WD
90 day: 22.22 mpg (US)
Thanks: 199
Thanked 1,804 Times in 941 Posts
Me too. I had missed these the first time around, when they were posted in response to a thread about the 2014 Cervelo P2/P3. The former chief engineer for Cervelo wrote that their wind tunnel tests showed that the front derailleur hanger, a small tab that hangs off the down tube, generated more drag than the down tube itself. Crazy.
__________________
UIUC Aerospace Engineering
www.amateuraerodynamics.com
  Reply With Quote
Old 05-30-2019, 05:49 PM   #324 (permalink)
ASV
weirdo
 
ASV's Avatar
 
Join Date: Oct 2008
Location: PHX AZ
Posts: 119
Thanks: 7
Thanked 19 Times in 17 Posts
Quote:
Originally Posted by kach22i View Post

ouch that first picture
talk about being sand blASSted
  Reply With Quote
Old 05-30-2019, 06:09 PM   #325 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,544
Thanks: 8,086
Thanked 8,878 Times in 7,327 Posts
That's precisely the configuration I'm advocating Arcimoto run with one of their electric tricycles. Just with a full envelope 'asset':



Converting the controls would be trivial. Invert the handlebars and add a 4-bar linkage to move the hydraulic brake foot pedal to the rear. The tandem bogey is to fit class rules.
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
.
.
Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
slowmover (06-02-2019)
Old 05-31-2019, 07:46 PM   #326 (permalink)
Primer is still paint!
 
ChopStix's Avatar
 
Join Date: Aug 2015
Location: box by the river
Posts: 604

85 Chevy Pickup C10 - '85 Chevy C10

‘21 Compass Latitude - '21 Jeep Compass Latitude 4x2
90 day: 32.46 mpg (US)
Thanks: 123
Thanked 154 Times in 121 Posts
I was browsing the News and found this. Its notably more "aero" than a lot of the RV's made today. I especially like the small size, curved sides, and top, which today are always made so blocky. The backend does nothing for aero, but neither do the majority of campers made today...





Original Article - Dually Camper
Attached Thumbnails
Click image for larger version

Name:	R.jpg
Views:	430
Size:	56.2 KB
ID:	26097   Click image for larger version

Name:	S.jpg
Views:	455
Size:	68.8 KB
ID:	26098  
  Reply With Quote
The Following 2 Users Say Thank You to ChopStix For This Useful Post:
Bicycle Bob (05-31-2019), slowmover (06-02-2019)
Old 05-31-2019, 10:24 PM   #327 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,544
Thanks: 8,086
Thanked 8,878 Times in 7,327 Posts
Random.
Aerodynamic.
Oddity.


Just A Car Guy: Like I've said before, you better be on the look out, especially around those damn amateur airports
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
.
.
Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
  Reply With Quote
The Following 3 Users Say Thank You to freebeard For This Useful Post:
niky (08-25-2019), skyking (06-01-2019), slowmover (06-02-2019)
Old 06-01-2019, 06:19 AM   #328 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,873
Thanks: 0
Thanked 1,684 Times in 1,502 Posts
The side profile of the roof extension in this Peugeot van is quite odd
  Reply With Quote
Old 06-02-2019, 12:49 PM   #329 (permalink)
Banned
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,422
Thanked 737 Times in 557 Posts
Re low-flying obstacles. FINISH first cup of coffee prior to leaving house each morning.

Note the tow rope. Just giving the other guy a hand with a rolling in-gear jump start. Ha! (Glider more likely).
  Reply With Quote
Old 06-02-2019, 12:54 PM   #330 (permalink)
Banned
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,422
Thanked 737 Times in 557 Posts
Quote:
Originally Posted by ChopStix View Post
I was browsing the News and found this. Its notably more "aero" than a lot of the RV's made today. I especially like the small size, curved sides, and top, which today are always made so blocky. The backend does nothing for aero, but neither do the majority of campers made today...





Original Article - Dually Camper
But there’s no getting around the weight & space inefficiency of a Motorhome. They are a dead end. Not worth any time or effort.

.

  Reply With Quote
Reply  Post New Thread






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