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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-04-2020, 11:37 PM   #1 (permalink)
Banned
 
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,594 Times in 1,131 Posts
A quiz for people

So here's a good example of a really low drag vehicle - incredibly well streamlined with a Cd of 0.101 - yes, 0.101.





It's the 1996 Honda Dream solar race car.

Now, who wants to guess whether, overall and at zero yaw, it has:

(1) Downforce
(2) Neither lift nor downforce
(3) A small amount of lift
(4) A lot of lift

Just putting down the number that corresponds with your guess would be good.


Last edited by JulianEdgar; 09-05-2020 at 01:47 AM.. Reason: Added second pic
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-04-2020, 11:47 PM   #2 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,155 Times in 1,463 Posts
Quote:
Originally Posted by JulianEdgar View Post
... Just putting down the number that corresponds with your guess would be good.
5

__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



  Reply With Quote
Old 09-04-2020, 11:50 PM   #3 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 9,273

Acura TSX - '06 Acura TSX
90 day: 28.24 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 26.85 mpg (US)
Thanks: 3,220
Thanked 3,546 Times in 2,645 Posts
3, though the question is subjective.

Wondering why the wheel cowlings weren't combined?
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 09-05-2020, 01:21 AM   #4 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,559

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)

Shirubāarō (*ω`*) - '05 Toyota Prius Executive
Team Toyota
90 day: 54.88 mpg (US)

Blue Thunder - '20 Hyundai IONIQ Trend PHEV
Team Hyundai
Plug-in Hybrids
Thanks: 68
Thanked 640 Times in 404 Posts
Send a message via MSN to jakobnev
3.5
__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
Old 09-05-2020, 02:36 AM   #5 (permalink)
EV convert
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 9,547

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 228
Thanked 3,122 Times in 2,442 Posts
Pi
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
  Reply With Quote
Old 09-05-2020, 03:17 AM   #6 (permalink)
Banned
 
Join Date: Nov 2017
Location: Australia
Posts: 2,060
Thanks: 107
Thanked 1,594 Times in 1,131 Posts
Quote:
Originally Posted by oil pan 4 View Post
Pi
I'll take that as #3!
  Reply With Quote
Old 09-05-2020, 04:35 AM   #7 (permalink)
EcoModding Lurker
 
Join Date: Mar 2012
Location: uk greece
Posts: 72

Endless money pit - '07 Toyota Yaris
90 day: 47.02 mpg (US)
Thanks: 33
Thanked 10 Times in 10 Posts
4
  Reply With Quote
Old 09-05-2020, 10:42 AM   #8 (permalink)
Moderator
 
Vman455's Avatar
 
Join Date: Feb 2012
Location: Champaign, IL
Posts: 1,848

Pope Pious the Prius - '13 Toyota Prius Two
Team Toyota
SUV
90 day: 51.9 mpg (US)

Tycho the Truck - '91 Toyota Pickup DLX 4WD
90 day: 24.12 mpg (US)
Thanks: 197
Thanked 1,650 Times in 869 Posts
I won't guess since I just downloaded and read the paper, but I will say: not what I expected.
__________________



  Reply With Quote
The Following User Says Thank You to Vman455 For This Useful Post:
aerohead (09-09-2020)
Old 09-05-2020, 11:20 AM   #9 (permalink)
EcoModding Apprentice
 
GreenTDI's Avatar
 
Join Date: Apr 2020
Location: Belgium
Posts: 223

GreenTDI - '11 Skoda Fabia Estate R3 1.2 CRTDI
TEAM VW AUDI Group
Diesel
90 day: 65.02 mpg (US)
Thanks: 53
Thanked 84 Times in 66 Posts
It looks like a wing, so I would say 3.
If the part under the car (between those wheels) is flat, straight and not curved, I would say 4.
__________________
Skoda Fabia Estate R3 1.2 CRTDI
See my thread: https://ecomodder.com/forum/showthre...mpg-38318.html
  Reply With Quote
Old 09-05-2020, 04:04 PM   #10 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 20,169
Thanks: 5,657
Thanked 6,593 Times in 5,316 Posts
Not an informed guess but if I was piloting that through the Oz-tralian Outback, I'd want downforce, just in case.

Quote:
Originally Posted by redpoint5
Wondering why the wheel cowlings weren't combined?
Zero yaw is a momentary condition.

FYI: EcoModder has a polling function.

__________________

."Once men turned their thinking over to machines thinking this would set them free. This only allowed other men with machines to enslave them." Frank Herbert
____________________

Sadhguru: Yesterday isn't good or bad, it's gone.
____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
redpoint5 (09-08-2020)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com