Sponsored

Deleted member 3316

Guest
It also solves a lot of the stainless steel to aluminum galvanic corrosion connection issues bolting the aluminum castings to a stainless steel exoskeleton. I could be wrong.
This galvanic corrosion thing got me thinking… can someone explain the mechanism here?

Is it an electrical phenomenon where the energy has nowhere to go?

If dissimilar metals are functioning like a battery couldn’t an LED or some other low energy devices be connected to draw the issue away? Rather than having a sacrificial anode?
Sponsored

 

LDRHAWKE

Well-known member
First Name
John
Joined
Dec 24, 2019
Threads
43
Messages
525
Reaction score
717
Location
Saint Augustine, Fl
Vehicles
Cyber Beast, GTS1000,FJR1300, Aprillia Scarabeo,
Occupation
Retired Engineer
Country flag
Careful not to conflate body-on-frame == exoskeleton-on-platform.

IDK what to expect exiting GigaAUSTIN. First principles, car motors would be a shocker, car platform a stunner and if exoskeleton is no longer structural, that’s a showstopper.
4382AF9C-4A46-4A35-B2C4-F0B74803B2A7.jpeg


All running gear are attached to the structural battery castings which are then mechanically integrated to the exoskeleton framework. This becomes one structural assembly fully integrated with shock towers landing at its terminus end supports.

We are saying the same thing. I am saying simply saying before the battery structure connected to the front and rear castings, that was not the original design concept.
 

Deleted member 3316

Guest
We are saying the same thing. I am saying simply saying before the battery structure connected to the front and rear castings, that was not the original design concept.
I’m not sure you can say this unequivocally.

Much of what we are all talking about is pure speculation and different interpretation of very limited information.

we won’t truly know the situation until Monroe and Associates tear one down…
I think there’s a chance that will happen very early in the production run.
 

LDRHAWKE

Well-known member
First Name
John
Joined
Dec 24, 2019
Threads
43
Messages
525
Reaction score
717
Location
Saint Augustine, Fl
Vehicles
Cyber Beast, GTS1000,FJR1300, Aprillia Scarabeo,
Occupation
Retired Engineer
Country flag
I’m not sure you can say this unequivocally.

Much of what we are all talking about is pure speculation and different interpretation of very limited information.

we won’t truly know the situation until Monroe and Associates tear one down…
I think there’s a chance that will happen very early in the production run.
I said this is speculation. We will know it if the wheel castings and batteries become a single structure, as my photo shows, or if the castings are separately connected to the exoskeleton as separate components.
 

Ogre

Well-known member
First Name
Dennis
Joined
Jul 3, 2021
Threads
166
Messages
10,735
Reaction score
27,050
Location
Ogregon
Vehicles
Model Y
Country flag
If Cybertruck is successful, I highly doubt Tesla would consider changing the design philosophy. I doubt going slightly smaller would negate the benefits of the exoskeleton/structural battery/die cast front rear….
You are likely right. Just a bit of random thought experiment.

Imagine if they did preserve the 3mm stainless and triangle design on a Maverick sized truck. They could have a small truck with ridiculous towing capacity and cargo capacity. Maybe
 


Jhodgesatmb

Well-known member
First Name
Jack
Joined
Dec 1, 2019
Threads
89
Messages
6,488
Reaction score
9,025
Location
San Francisco Bay area
Website
www.arbor-studios.com
Vehicles
Tesla Cybertruck FS AWD, Tesla Model Y LR
Occupation
Retired AI researcher
Country flag
I don't think it is batteries that are holding the CyberTruck in concept vehicle mode. That would have been easy for Elon to say and use it as an out.

Yes, Tesla has been successful solving challenges in the past, but that does not mean they can solve everything. Or in a timely manner.

If Tesla wasn't building Model Ys and Model 3s as fast as humanly possible, then they could spend time working on the final engineering hurdles for the CyberTruck.

But Elon made it clear they have more engineering to do on CyberTruck, partly due to trying to make it "affordable" with all the tech they promised to put in it.

My guess is the Quad motor, they announced would come first, is probably coming in at $85,000+ retail and they are going back to try and re-engineer aspects of the CT to try to get the costs down. Fact is the CT has been pushed back to "hopefully" 2023. In Elon speak, since he always over promises on timelines, I am guessing 2024 before a decent amount of trucks roll out of the factory.
He doesn’t always over promise on timelines. He was way off in the other direction when the Model Y came out. I am sure that you are referring to the many times he ‘has’ been wildly off, but to say ‘always’ isn’t correct.
 

Jhodgesatmb

Well-known member
First Name
Jack
Joined
Dec 1, 2019
Threads
89
Messages
6,488
Reaction score
9,025
Location
San Francisco Bay area
Website
www.arbor-studios.com
Vehicles
Tesla Cybertruck FS AWD, Tesla Model Y LR
Occupation
Retired AI researcher
Country flag
Pioneering in the wrong direction. Don’t get me wrong. The CT is really cool and I hope to get one but adding all that exoskeleton weight and cost to a vehicle is mostly just for a cool factor and not a practical engineering advancement. And if it permanently delays the CT is it really worth it?
If the weight and size are on the same order as the old F150, even with the battery pack, it is hard to follow your argument that the exoskeleton is adding weight. It would actually follow that it is reducing weight.
 

LDRHAWKE

Well-known member
First Name
John
Joined
Dec 24, 2019
Threads
43
Messages
525
Reaction score
717
Location
Saint Augustine, Fl
Vehicles
Cyber Beast, GTS1000,FJR1300, Aprillia Scarabeo,
Occupation
Retired Engineer
Country flag
If the weight and size are on the same order as the old F150, even with the battery pack, it is hard to follow your argument that the exoskeleton is adding weight. It would actually follow that it is reducing weight.
it is adding weight if you don’t need it as the main structural support when you have a structural battery connected to the wheel casting acting as a frame.
 

Jhodgesatmb

Well-known member
First Name
Jack
Joined
Dec 1, 2019
Threads
89
Messages
6,488
Reaction score
9,025
Location
San Francisco Bay area
Website
www.arbor-studios.com
Vehicles
Tesla Cybertruck FS AWD, Tesla Model Y LR
Occupation
Retired AI researcher
Country flag
When Tesla changed direction in a cast front and rear connected with a structural battery the whole exoskeleton design based weight and cost savings was no longer in the equation. It is now a body on frame.
And what do you suspect they were originally planning on doing for the front and rear that would differ in more than complexity? I cannot see your argument holding water.
 

LDRHAWKE

Well-known member
First Name
John
Joined
Dec 24, 2019
Threads
43
Messages
525
Reaction score
717
Location
Saint Augustine, Fl
Vehicles
Cyber Beast, GTS1000,FJR1300, Aprillia Scarabeo,
Occupation
Retired Engineer
Country flag
And what do you suspect they were originally planning on doing for the front and rear that would differ in more than complexity? I cannot see your argument holding water.
The front and rear suspension was never a structural member until the 8 Gig press came along.
 


Jhodgesatmb

Well-known member
First Name
Jack
Joined
Dec 1, 2019
Threads
89
Messages
6,488
Reaction score
9,025
Location
San Francisco Bay area
Website
www.arbor-studios.com
Vehicles
Tesla Cybertruck FS AWD, Tesla Model Y LR
Occupation
Retired AI researcher
Country flag
We are saying the same thing. I am saying simply saying before the battery structure connected to the front and rear castings, that was not the original design concept.
And you know this how? The M3/MY designs both use front and rear housings (but with different numbers of parts) and both connected to the battery. The CT was probably designed along the same reasoning but beefed up. Do I ‘know’ this? No, I don’t. But you don’t either.
 

Jhodgesatmb

Well-known member
First Name
Jack
Joined
Dec 1, 2019
Threads
89
Messages
6,488
Reaction score
9,025
Location
San Francisco Bay area
Website
www.arbor-studios.com
Vehicles
Tesla Cybertruck FS AWD, Tesla Model Y LR
Occupation
Retired AI researcher
Country flag
The front and rear suspension was never a structural member until the 8 Gig press came along.
Huh? A front or rear housing need not be a casting, let alone a single piece, to be structural.
 

LDRHAWKE

Well-known member
First Name
John
Joined
Dec 24, 2019
Threads
43
Messages
525
Reaction score
717
Location
Saint Augustine, Fl
Vehicles
Cyber Beast, GTS1000,FJR1300, Aprillia Scarabeo,
Occupation
Retired Engineer
Country flag
And you know this how? The M3/MY designs both use front and rear housings (but with different numbers of parts) and both connected to the battery. The CT was probably designed along the same reasoning but beefed up. Do I ‘know’ this? No, I don’t. But you don’t either.
i’ll repeat for the third time. I don’t know! But why else would they buy an 8 Gig press for large casting and make the battery structural? It is only logical….at least to me, to use the same concept as is being used on model Y.

it is possible they bolt four separate castings and battery pack onto a Cybertruck exoskeleton…..the model Y design wasn’t an option when the Cybertruck was first designed.
 
Last edited:

Crissa

Well-known member
First Name
Crissa
Joined
Jul 8, 2020
Threads
138
Messages
19,571
Reaction score
31,475
Location
Santa Cruz
Vehicles
2014 Zero S, 2013 Mazda 3
Country flag
This galvanic corrosion thing got me thinking… can someone explain the mechanism here?

Is it an electrical phenomenon where the energy has nowhere to go?

If dissimilar metals are functioning like a battery couldn’t an LED or some other low energy devices be connected to draw the issue away? Rather than having a sacrificial anode?
It becomes a battery, yes. But what you want is for the electrons not to transfer - so you have to add energy back into the system.




Not the video I was thinking of, but it covers the basic mechanics.

-Crissa
 

HaulingAss

Well-known member
Joined
Oct 3, 2020
Threads
28
Messages
10,325
Reaction score
20,742
Location
Western Washington, USA
Vehicles
Cybertruck DM, 2010 F-150, 2018 Performance Model 3, 2024 Performance Model 3
Country flag
it is adding weight if you don’t need it as the main structural support when you have a structural battery connected to the wheel casting acting as a frame.
It is obvious you have little clue about the strength required of a truck capable of carrying an additional 3500 lbs. of payload. Of course the stainless exoskeleton is required for the necessary strength and rigidity. A skateboard of the type envisioned is just one part of the equation and not even close to what is required for a truck of this capability. It's flat, it requires the triangular shape and the depth in the Y dimension to achieve the required strength.

What you are suggesting is a heavy-duty bridge without girders. Maybe you refrain from speculating about things you know so little about.
Sponsored

 
 








Top