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


Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-05-2021, 05:06 PM   #1 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 12,181
Thanks: 19,612
Thanked 6,151 Times in 3,784 Posts
Cd 0.208 2021 Tesla Model S Plaid



Cd shared this at another forum today.
The car hit 200-mph, 0-60 in 1.9-seconds, 390-miles range, 1020-hp.
For 2021, the Model S received changes at the front facia / lower splitter, panoramic glass roof, new wheel design, new diffuser, wider side skirts, flared wheel arches, and Plaid version has a new rear duckbill spoiler.
She now holds the title of lowest drag production sedan.
Lightyear One is advertised at lower drag, however, it's tires probably limit its utility / performance.
We can wait and see if Porsche can 'see' Tesla with their Taycan Turbo, and then, raise the ante even higher.
If the US DOT ever allows for synthetic vision, allowing the loss of side mirrors, cars like Model S will immediately fall to Cd 0.19, saving Giga-Watts each year.

Attached Thumbnails
Click image for larger version

Name:	Tesla_S_Plaid_1.jpg
Views:	210
Size:	27.3 KB
ID:	30229   Click image for larger version

Name:	Tesla_S_Plaid_2.jpg
Views:	235
Size:	30.1 KB
ID:	30230  
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/

Last edited by MetroMPG; 02-25-2021 at 08:34 AM.. Reason: (added pic)
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
redpoint5 (02-05-2021)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-05-2021, 06:59 PM   #2 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 8,555

Acura TSX - '06 Acura TSX
90 day: 29.14 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: 26.65 mpg (US)
Thanks: 2,914
Thanked 3,291 Times in 2,453 Posts
I hope this drives used values down to the point I'm tempted to get one.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!

The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary. -H.L Mencken.
  Reply With Quote
The Following 2 Users Say Thank You to redpoint5 For This Useful Post:
aerohead (02-10-2021), Ecky (02-06-2021)
Old 02-06-2021, 07:41 AM   #3 (permalink)
EcoModding Lurcher
 
mort's Avatar
 
Join Date: Dec 2010
Location: Los Angeles
Posts: 317
Thanks: 142
Thanked 100 Times in 72 Posts
Quote:
Originally Posted by aerohead View Post
The car hit 200-mph, 0-60 in 1.9-seconds, 390-miles range, 1020-hp.
Online calculators estimate 0-60 times of around 1.9 seconds for electric drive with 1000 hp and 5000 lb curb weight
But - assuming 25 sq ft frontal area, the ecomodder mpg estimator only requires 308 hp to reach 200 mph. It seems the top speed of the plaid+ should be much higher. This top speed to power calculator suggests 300 mph.
-mort
  Reply With Quote
The Following User Says Thank You to mort For This Useful Post:
aerohead (02-10-2021)
Old 02-06-2021, 10:10 AM   #4 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 1,572
Thanks: 153
Thanked 428 Times in 364 Posts
Yes but remember that electric motors suffer from back EMF as the motor speed increases reducing available torque and hp.
  Reply With Quote
Old 02-06-2021, 11:54 AM   #5 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,213
Thanks: 2,466
Thanked 852 Times in 505 Posts
Aerohead, where did you find pictures of the updated car ?
I'm seeing lots of artists' renderings online, but on Tesla.com the car doesn't look drastically different.

The main difference I see right away is an integrated splitter below the front bumper area, wheel curtains like the Model 3, and flared fenders.
  Reply With Quote
The Following User Says Thank You to Cd For This Useful Post:
aerohead (02-26-2021)
Old 02-06-2021, 01:43 PM   #6 (permalink)
Master EcoModder
 
Join Date: Feb 2014
Location: Missoula, MT
Posts: 2,184

Dark Egg - '12 VW Touareg TDI Sport AWD
90 day: 25.81 mpg (US)
Thanks: 202
Thanked 928 Times in 635 Posts
But if the widened the car they may not have really lost much in overall drag. If it's anything like that widebody they were testing I bet it's a wash.
__________________

  Reply With Quote
Old 02-06-2021, 01:49 PM   #7 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 18,363
Thanks: 5,037
Thanked 6,073 Times in 4,862 Posts
Piotrsko: Buried Permanent Magnet motors don't suffer at higher RPMs.
__________________
.
The difference between science and screwin' around, is writing it down.
Adam Savage
_________________
  Reply With Quote
Old 02-06-2021, 03:28 PM   #8 (permalink)
In the fasting lane
 
RedDevil's Avatar
 
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,855

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 49.75 mpg (US)

It - '09 Hyundai I10 Active Cool
Team Hyundai
90 day: 29.76 mpg (US)
Thanks: 1,605
Thanked 2,127 Times in 1,371 Posts
The new S isn't drastically different, but the little changes do a lot.
Like the slots in the corners of the front bumper, presumably for an air curtain in the front wheel well.

For comparison: my Insight has a Cd of .28, while the very similarly dimensioned Hyundai Ioniq has a Cd of .24. Crazy no?
It all comes down to little details like the air curtains (there too) and tweaks from more time in the wind tunnel and better CFD.

About the top speed. They can make it faster, but shouldn't.
Going faster than 200 mph in an EV makes no sense, as the time gained doing that would be more than lost in recharging times even at extreme charging speeds.
Safety wise it makes no sense either. It would still be a car, not a Formula 1 racer that can brake with 6G; without added downforce it would still take at least 6 seconds to come to a standstill, and it travel almost 300 meters during braking. If you take a second to react to spotting a potential danger, it better be over a quarter mile away or you're bound to hit it.
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.



“We all know that light travels faster than sound. That's why certain people appear bright until you hear them speak.” ― Albert Einstein
  Reply With Quote
Old 02-06-2021, 09:37 PM   #9 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 4,198

Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 20.16 mpg (US)

K-sight - '00 Honda K-sight
Team Honda
90 day: 42.17 mpg (US)
Thanks: 2,003
Thanked 1,776 Times in 1,149 Posts
Top speed could be gearing / max motor RPM limited.
  Reply With Quote
Old 02-08-2021, 11:21 AM   #10 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 1,572
Thanks: 153
Thanked 428 Times in 364 Posts
Top speed is more probably back EMF limited

  Reply With Quote
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