CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car From Scratch

[NeilBlanchard]

Originally Posted by cRiPpLe_rOoStEr

Among several other options, which ones would you be more favorable to?

Given the efficiency and ease of packaging, I would think that in-wheel motors would make the most sense.

[freebeard]

Thanks - I will be trying this out.

There may be other solutions, this is just known to me. Frankly I don't get very far in Blender myself. I'm thinking about hiring a community college student to tutor me.

In addition to the watertight hull you'll also find retopo:

https://docs.blender.org › manual › en › latest › modeling › meshes › retopology.html
Retopology — Blender Manual
Retopology is the process of simplifying the topology of a mesh to make it cleaner and easier to work with. Retopology is need for mangled topology resulting from sculpting or generated topology, for example from a 3D scan. Meshes often need to be retopologized if the mesh is going to be deformed in some way.

And of course you have rendering, compositing and a video editor (and a spreadsheet!)

https://docs.blender.org › manual › en › latest › editors › spreadsheet.html
Spreadsheet — Blender Manual
Spreadsheet — Blender Manual Spreadsheet The Spreadsheet editor is used to inspect geometry attributes. The Spreadsheet editor. Header Object Evaluation State Display the data of an object at different states of its evaluation. Evaluated Display data from the object with all modifiers applied.

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Aptera hub motors? Who else has them?

[cRiPpLe_rOoStEr]

Originally Posted by NeilBlanchard

Given the efficiency and ease of packaging, I would think that in-wheel motors would make the most sense.

With torque-vectoring AWD too?

[aerohead]

In the August 2022 MOTOR TREND article about the Mercedes-Benz Vision EQXX, Frank Marcus mentioned that Mercedes' design studio used ZBrush 'digital sculpting' ( like Dreamworks used to render Shrek ) to shape parts of the car for 3-D printing.
I'd not heard of this software before.

[freebeard]

ZBrush
pixologic.com/features/about-zbrush.php
Pixologic ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology which stores lighting, color, material, orientation, and depth information for the points making up all objects on the screen.Wikipedia
Developer(s):
Pixologic
Initial release:
1999
Operating system:
Windows 10 version 1709 and later, macOS 10.13 and later

ZBrush is sculpting tool comparable to Blender Sculpt Editor. The 'pixol' tech sounds similar to OpenVDB.

https://www.blender.org › features › sculpting
Sculpting — blender.org
Experience the joy of sculpting organic subjects using the built-in sculpting feature set of Blender. Sculpting in Blender includes: 20 different brush types Multi-res sculpting support Dynamic Topology sculpting Mirrored sculpting Brushes Blender comes with built-in brushes such as Crease, Clay Strips, Pinch, Grab, Smooth, Mask and many more.

Sculpting is [usually] for organic shapes. For hard surface objects there're other tools.

https://www.blendernation.com › 2020 › 04 › 04 › blender-add-ons-review-boxcutter-and-hard-ops
Blender add-ons review — BoxCutter and Hard Ops - BlenderNation
Hard Ops makes use of Blender's modifiers and other built-in tools and functions. It does not have its own custom Booleans or other custom-coded algorithms. The advantage of this is that the non-destructive modifier-based output of Hard Ops is easily adjustable because you're already familiar with the native modifier settings.

[aerohead]

I keep revisiting the 1987, Renault Vesta-II, Cd 0.186, 2008 M-B Bionic Boxfish, Cd 0.19, and Rocky Mountain Institute's 1990s 'Hypercar', Cd 0.16, as a 'glider', without powertrain.
Basically speaking, CarBEN seems like the offspring of these three, only with the added benefit of the full skirt package.
If it didn't come in at around Cd 0.16, as she sits, I'd be shocked. All the elements are there.
Especially as a BEV, which benefits from lower body porosity, from lower drag, lower road load power requirement, as with the M-B Vision EQXX.

[ME_Andy]

I think you should lower your standards on aerodynamic drag and just wrap it up already. Perfection is the enemy of progress and all that

[cRiPpLe_rOoStEr]

Originally Posted by ME_Andy

Perfection is the enemy of progress and all that

I'd have to agree. Yet some real-world usage of the car would enable gathering information for eventual upgrades, either for a retrofit or in case of an updated version being made later.

[freebeard]

Originally Posted by ME_Andy

I think you should lower your standards on aerodynamic drag and just wrap it up already.

I don't think that's the problem.. The theoretical shape needs instantiation..

09-14-2016, 09:27 AM #695:

I am still intending to do work, but I lack the garage space.

I had hopes and dreams in 2016 as well.

[NeilBlanchard]

I would have a very tall mountain to climb to get the structure of this construction method to work. I did buy a Saab 900 as a suspension donor, but that has been rusting in my yard for about 6 years. The battery channels in the bottom of the car would have to have metal liners to provide tension strength between the front and rear "subframes".

If I can verify what the Cd is, then there are better ways to construct it. I hope it is below 0.20 and it certainly could be lower than that. The Mercedes Bionic car and the Schlorwagen were two of the main influences. The center driver comes from the latter - and this is the way to gain the most use of the interior volume. And it protects the driver better in a crash; all else being equal.

The two things that are harder to see that are aero related - the underside rises up about 3-4 inches from the lowest point between the front wheels, and the rear track is 7" narrower than the front track. The area of the rear face is pretty small - maybe 55-65% of the frontal area.