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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-11-2024, 01:00 AM   #1 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 1,121

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 1
Thanked 592 Times in 470 Posts
Tesla robo taxi drag?

Anyone know the drag coefficient on the new Tesla robo taxi? Looks like their most aero vehicle. Full wheel covers and mini boat tail and more rounded front

Attached Thumbnails
Click image for larger version

Name:	IMG_2195.jpeg
Views:	34
Size:	309.5 KB
ID:	35217  
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-11-2024, 02:32 AM   #2 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
Anybody watching the We, Robot dog & pony show?

They just rolled out a 20-passenger robot bus that makes the Cybertruck seem 'normal'.

edit: The RoboTaxi has single hinged butterfly doors that almost doubles the vehicle width when open. They're 40% of the vehicle length and open diagonally, the hinge is right above the wheelwell.

They have the Optimus robots cage go-go dancing.
__________________
.
.
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.

Last edited by freebeard; 10-11-2024 at 02:51 AM..
  Reply With Quote
Old 10-11-2024, 03:11 AM   #3 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,749

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

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

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

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 57.45 mpg (US)
Thanks: 4,316
Thanked 4,471 Times in 3,436 Posts
They made a coupe a taxi?
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 10-11-2024, 03:21 AM   #4 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
electrek.co/2024/10/10/tesla-unveils-cybercab-electric-robotaxi
Quote:
Tesla didn’t release much in terms of specs for the new vehicle. There was no word on the electric vehicle’s range.
Check out the trunk space:



The top comment there is "why no 4-seater?" I suspect the 20-passenger robobus will have a low average occupancy, like a city bus.


https://www.msn.com/en-us/autos/othe...re/ar-AA1s45kg
__________________
.
.
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.

Last edited by freebeard; 10-11-2024 at 03:31 AM..
  Reply With Quote
Old 10-11-2024, 07:27 AM   #5 (permalink)
Mechanical engineer
 
Vekke's Avatar
 
Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,272

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
90 day: 24.67 mpg (US)
Thanks: 270
Thanked 841 Times in 414 Posts
"why no 4-seater?"

Model 3 and Y can also work as robotaxis Or the robobus so you choose which car you will need based on your head and luggage count.

My post and estimates on Linkedin

#tesla hashtag#robotaxi is coming and it's hashtag#aerodynamics look great.
-No mirrors
-teardrop roofline
- pretty low ground clearance
- tight wheel arches
- hard to say the wheel and tire size yet but looks little narrower than model 3. -->Front 215/60R18 --> rear 225/60R21 wheels and tires from continental
- fully closed wheelcovers

All this should lead to Cd around 0.20 range - +0.01 tolerance. No mention of that yet. I can give better estimate when I see some closeup videos on the car from the event. The impact ofcourse is that you can use smaller battery and make lighter car.

I would say the robotaxi will use a lot of underside body parts from model 3 as the size seemed to match more that vehicle.

The fully closed wheelcover makes it possible to design a very ligth wheel as looks are not so important, one of the reasons why my wheelcovers are also fully closed.

what is hurting aero is no tire spats.
Air curtains are a mystery but I guess they are there same way as model 3.

Those wheels and tire could have been smaller.

Roofline is within few mm from MB EQXX roofline.
__________________


https://www.linkedin.com/in/vesatiainen/

Vesa Tiainen innovation engineer and automotive enthusiast

Last edited by Vekke; 10-13-2024 at 04:59 PM..
  Reply With Quote
The Following 2 Users Say Thank You to Vekke For This Useful Post:
aerohead (10-16-2024), RedDevil (11-02-2024)
Old 10-11-2024, 06:15 PM   #6 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
Today I walked to the pharmacy and back. When I watched a Tesla make a left turn in front of me I noticed the driver had a hand on the steering wheel. Something new to think about. I also saw a Starlink antenna in a back yard within a block or two of where I first saw a Cybertruck a month ago,

I'm having to reevaluate my land line only stance. Three reasons.
  • Starlink direct to cell is coming.
  • You won't be able to hail a robotaxi from the curb and pay cash.
  • Rob Braxman is taking preorders on a $279 de-Googled cell phone
__________________
.
.
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
Old 10-11-2024, 11:23 PM   #7 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
It's about the robotaxi, but mostly the chips and data collection and service. Plus a dig at Waymo.

FSD means 10x the miles per years so chips need to be more robust. Their 5th generation chip will be 10x as powerful.

I just like her voice.
__________________
.
.
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
Old 10-12-2024, 11:13 AM   #8 (permalink)
Master EcoModder
 
Join Date: Feb 2014
Location: Missoula, MT
Posts: 2,668

Dark Egg - '12 VW Touraeg
Thanks: 305
Thanked 1,187 Times in 813 Posts
The car that will crawl around on city streets, a taxi, should prioritize occupant comfort, egress, interior room. If this is a taxi it's size and shape is dumb. If this is the new model 2 for general population use then it looks great. Just put some normal doors on it, a steering wheel and controls, and send it.
  Reply With Quote
Old 10-12-2024, 01:21 PM   #9 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
Quote:
The car that will crawl around on city streets, a taxi, should prioritize occupant comfort, egress, interior room. If this is a taxi it's size and shape is dumb.
Average occupancy is 1.4 passengers.
Quote:
https://www.sciencedirect.com › science › article › pii › S1018363918307141
Taxi Service Characteristics and Involvement in Road Traffic Accidents ...
Study data show that the number of revenue trips served daily is 18.64 per taxi vehicle. The average occupancy per trip is 1.40 passengers (MOC study [8] found this occupancy 1.20 and Al-Gadhi study (1994) found it 1.52). In addition, this study found that, on average, the taxi vehicle operates 6.7 days per
On it's own maybe inadequate, but once you get to 4-5 passengers the robovan takes up the slack.

City streets or freeways?
__________________
.
.
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
Old 10-15-2024, 05:52 AM   #10 (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 Hersbird View Post
The car that will crawl around on city streets, a taxi, should prioritize occupant comfort, egress, interior room. If this is a taxi it's size and shape is dumb. If this is the new model 2 for general population use then it looks great. Just put some normal doors on it, a steering wheel and controls, and send it.
I agree with you, but let's explore some possible reasons for this situation.

Assume this is the Model 2, but a fully automated version.

Assume a taxi as a revenue maker can fetch a higher sale price.

Assume a Model 2's demand could not be met for a while, this buys time.

.................................................. .....................................

If one or more assumptions are correct, what we see makes complete sense.

Otherwise a shape similar to one of Canoo's projects would make more sense.

EDIT: Aren't taxi's expected to carry luggage?

__________________
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
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