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-   -   Tribute to Syd Mead or F-117 aerodynamics? (https://ecomodder.com/forum/showthread.php/tribute-syd-mead-f-117-aerodynamics-38000.html)

botsapper 11-22-2019 01:25 AM

Tribute to Syd Mead or F-117 aerodynamics?
 
Tesla Cybertruck!

https://i.kinja-img.com/gawker-media...9likoynycy.jpg

https://www.motortrend.com/uploads/s...ound%7C875:492

https://www.motortrend.com/uploads/s...ound%7C875:492

https://www.motortrend.com/uploads/s...ound%7C875:492

https://www.motortrend.com/uploads/s...ound%7C875:492

https://www.motortrend.com/uploads/s...ound%7C875:492

https://electrek.co/wp-content/uploa...y=82&strip=all

Inspired by Italdesign Giugaro's Lotus Espirit S1 or Gandini's Lancia Stratos Zero

https://img.pistonheads.com/Fullsize...S3623960-1.jpg

https://hips.hearstapps.com/roa.h-cd...p&resize=980:*

kach22i 11-22-2019 09:23 AM

Cool.

The last time I experimented with such a shape it was a tandem two seater with outboard wheels, and a canopy that slid back so it was also a convertible. Drew 3 and 4 wheel versions, a mix between BF-109 and F-117.

The project prior to that was (30 years ago now?) was a 3rd world flat plane plywood car (just for fun) that I built a foam core model of.

The buttresses on this Tesla are rather first Gen Honda Ridgeline-ish, and I like that.

This is an angular pill to swallow but maybe what the doctor ordered?

I was fairly sure that the Tesla pickup was going to be a scaled down version of the Semi-Truck design, at least that the direction my own private sketches have been going for the last few years.

I suspect this Tesla has the military market in mind, and not so much civilian, why else the special unbreakable windows?

Tesla reveals Cybertruck, but breaks its 'unbreakable' windows during unveiling
https://www.cnn.com/2019/11/22/cars/...uck/index.html
https://cdn.cnn.com/cnnnext/dam/asse...xlarge-169.jpg
https://cdn.cnn.com/cnnnext/dam/asse...xlarge-169.jpg
Quote:

Another eye-catching feature of the truck is its price. The base version of the truck will start at $39,900. That's only about $10,000 more than the price of a base model Ford F-150, which starts at about $30,000. But it would compete well with the cost of a nicely equipped F-150. An F-150 Lariat Super Cab, for instance, starts at about $44,000.

Prices for the top end Tri Motor AWD version of the Cybertruck start at $69,900. Buyers will also be able to choose Tesla's "self-driving" option for $7,000. (The truck should be able to drive itself once the software for that becomes available.)

Musk had one final surprise as the presentation was wrapping up.
"Oh, yeah," he said. "We also made an ATV."

With that, a rider came out from a side room on a small electric all-terrain vehicle. He flipped down the truck's tailgate, extended a built in ramp, and rode it up into the bed.
To stay in business I suspect they will have to add $100,000 to those prices and become advanced scout vehicles for the world wide military market.

I could be wrong, but do not see this specialty item derailing any of the electric truck offerings and or plans on the near horizon.

Quote:

Rivian, a Michigan-based start up also plans to begin selling its own electric pickup next year. The company counts Amazon and Ford as major investors. Rivian founder, R.J. Scaringe, ranked third on this year's just-released Motor Trend Power List, a largely subjective ranking of relative auto industry mojo. Musk ranked 24th. Rivian's trucks will cost tens of thousands of dollars more then Tesla's, but they will look far more like trucks.
Aerodynamically speaking, lots of drag from those wheel flares. I know this first hand and not just by looking at CFD images online because I've done stuff to my pickup truck.

I also expect a lot of flat plane rolling vortexes of which numerous diagrams have been posted in the forum over the years. That roof plane change isn't exactly a friendly transition.

From the Random Aerodynamic Oddity Thread:

Strouhal Numbers of Unsteady Flow Structures Around a Simplified Car Model
https://link.springer.com/chapter/10...642-40371-2_26
https://media.springernature.com/ori..._Fig5_HTML.gif
Quote:

is work aims to gain relatively thorough understanding of unsteady flow structures around an Ahmed body and associated predominated Strouhal numbers St x SQ RT "A" based on the square root of the frontal area A.
Flow structures in the near-wake of the Ahmed model
https://www.sciencedirect.com/scienc...89974605000514
https://ars.els-cdn.com/content/imag...000514-gr1.jpg
Quote:

Time-dependant analysis revealed that the shedding behind the model is analogous to vortex shedding behind bluff bodies, with most of the fluctuations confined to the axial direction.

Frank Lee 11-22-2019 11:04 AM

Yeesh. It's got errodynamics.

Hersbird 11-22-2019 01:49 PM

I bet they are counting on model X history to estimate the range. Unfortunately the Model X is aerodynamic so this thing is going to need twice the model X battery if not more to get those kinds of ranges with more frontal aera, terrible aerodynamics, and big off road tires.

kach22i 11-22-2019 02:35 PM

False Flag operation and or testing public opinion of the military version on same platform intend for a scaled down Semi-Truck looking pickup truck?

http://forums.pelicanparts.com/uploa...1574451037.jpg

The above is from my Aerodynamic Folder in my computer, do not recall where I got it from but a reverse image search may lead you there.

Hersbird 11-22-2019 03:25 PM

Ok so I think one simple change would improve this both aesthetically and aerodynamically. Just flatten the roof. The peak just adds frontal aera and makes a tougher angle that forms eddies.

I'm going to dub the peak a Tesla "dunce cap"

https://ecomodder.com/forum/member-h...23-gallery.jpg

kach22i 11-22-2019 05:39 PM

Tesla CyberTruck - Page 3 - Pelican Parts Forums
http://forums.pelicanparts.com/uploa...1574455248.jpg

Guess they don't understand rounded front corners on trailers either.

The front should be canted, not the rear - it's freaking backwards.

redpoint5 11-22-2019 05:40 PM

Sure, but just about every vehicle is designed this way nowadays, not with a sharp transition, but with a tapered and sloped transition. The whole reason it's peaked is that it maximized headroom in the driving position.

botsapper 11-22-2019 06:32 PM

1st-gen Lara Croft finally has a Barbie Truck! https://i.imgur.com/EtiRpFY.jpg

kach22i 11-22-2019 10:14 PM

Quote:

Originally Posted by Hersbird (Post 612075)
............. Just flatten the roof.

Someone did a little more than that in this Photoshop and removed what little aerodynamic value there was.

Random TRANSPORTATION pictures - Page 2268 - Pelican Parts Forums
http://forums.pelicanparts.com/uploa...1574470945.jpg


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