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Old 11-24-2019, 12:17 PM   #21 (permalink)
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I was just reading on F117 aerodynamics. That think was built with two goals, stealth and the ability to fly. Aerodynamically it was a 50 year or more setback

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Old 11-24-2019, 02:30 PM   #22 (permalink)
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In the case of the F-117 the constraint was modelling the radar reflections. Those things that replaced slide rules (computers) couldn't handle compound curves. By the time for the B-2 that had been sorted.

In the case of the Cybertruck, they're essentially trying to stamp out pieces made from spring steel.

Everybody is commenting — even Akkad Daily. He provides an assortment of memes (Baby Yoda showing his truck drawing to Elon in a cloud of smoke), but starts by showing his childhood favorite car from Total Recall and then ranting about the truck being ugly.
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Old 11-24-2019, 05:31 PM   #23 (permalink)
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Quote:
Originally Posted by Hersbird View Post
I was just reading on F117 aerodynamics. That think was built with two goals, stealth and the ability to fly.
In contrast, the Tesla Cybertruck design was built with two goals; most 'visible' & distinctive vehicle profile ever and the ability to 'fly' Tesla into the most lucrative truck market!
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Old 11-24-2019, 07:51 PM   #24 (permalink)
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Quote:
the Tesla Cybertruck design was built with two goals
What you are seeing is a revolution in manufacturability. Folding metal is cheaper than stamping it. No paint is cheaper than paint. Flat glass is cheaper than molded glass.

The high end Cybertruck gets you 500 mile range for $70K. The Roadster has more range but costs 3x. The low end Cybertruck costs as much as a Model 3 but carries six passengers instead of five.
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Old 11-25-2019, 11:03 AM   #25 (permalink)
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The ease of manufacturing is still to be debated. This is Elon we are talking about. Remember the 3 piece wheel tub and that we are talking about making parts of some sort of stainless. Whole different forming and machine processes than cold roll.

A couple of one off's is very different than making 10,000 identical items in a short time.
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Old 11-25-2019, 06:10 PM   #26 (permalink)
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More polygons in creating their truck

Low poly Karlmann King had a little bit more pieces to play with...

https://www.youtube.com/watch?time_c...ature=emb_logo
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Old 11-26-2019, 03:29 PM   #27 (permalink)
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Cybertruck CFD

Are the boxy Tesla Cybertruck’s aerodynamics any good? An engineer found out

From his Facebook post about it:

Well, no one else did it so I did. Here is the #CyberTruck in CFD. What intrigues me is how well this works. While it may occur to be happenstance that the aero turns out quite well, I believe this was actually the result of very clever design. Ease of manufacturing in flat panels, significant use of triangulated body parts, etc. I won't quote a drag coefficient, as I dont want to put words in anyone's mouth, but I will place money on it being much lower than most sports cars, and any truck period. Further, I believe the vortex shed over the bed walls helps act to "seal the bed" when the cover is open. I havent modeled the open bed yet, but it sure seems promising. Further, it appears the front end is designed to almost entirely blank out / shield the wheel well.... The cad file is dimensionally correct, all angles and curves are as close as possible. There are some uncertainties such as fenders and wheel well air-exhaust etc.

Lastly, at 65mph the local velocity over the roof "peak" is 88mph. Is this the ultimate Elon Easter Egg?
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Old 11-26-2019, 03:40 PM   #28 (permalink)
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Found out, and then shared the results with nobody. The article doesn't say how good the shape is.

I'm assuming it's pretty decent compared to typical truck design. Could be better with radiused curves instead of sharp ones, but maybe it didn't affect efficiency too severely.
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Old 11-26-2019, 06:29 PM   #29 (permalink)
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Old 11-26-2019, 06:43 PM   #30 (permalink)
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It amazes me how quickly I've got from an initial impression that the truck is hideous, to it kinda growing on me.

Maybe I'll buy one instead of a minivan if/when the family grows.

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