Cybertruck Trailer Hitch/Casting Failure @10,400 lbs *VERTICAL LOAD*

[greggertruck]

Over 10k lbs before the casting "snapped"

Pure punishment!

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[Florida]

?????

 

[cybercricket]

Do we need to talk about "static" vs "dynamic" ?

 

[SCTesla]

I saw in the comments that the Ram did better and didn't break. It's being publicized as a negative on the CT. I assume there's a video I'll watch later

Edit: I found the video. Most comments are asking if Tesla will fix this as it shouldn't break with a static load like that. They are saying it's confirmation of Whistling Diesel's videos.

 

[CyberGus]

They are saying it's confirmation of Whistling Diesel's videos.

sigh

 

[Pulaski]

over 10k lbs before the casting "snapped"

Pure punishment!

Wow. That's pretty incredible!

 

[NXTruck]

I’d rather him load up the hummer again and put on a weigh safe hitch and point a camera at it and beat the shit out of it to see what the max tongue weight registers at.

but there has been at least one snap during what seemed like normal towing adding some murkiness.

I’m picturing a hummer EV hanging off the hitch, 10k is insane weight.

 

[tskyline]

This pisses me off. Jerryrigeverything publicly hates elon and taking some of it out of the Cybertruck. I am not trying to defend it, but do the same test on rivian too, right?
I mean what does this prove? Yeah we get it you hate him yadda yadda pffft

 

[Gigahorse]

Breaking at the tow weight is not good.
When traveling 60mph a load shift, construction dip etc would send that weight close to 10klbs.
I was hoping the failure weight would be closer to 15k which would give the appropriate margin for safety.

 

[greggertruck]

Breaking at the tow weight is not good.
When traveling 60mph a load shift, construction dip etc would send that weight close to 10klbs.
I was hoping the failure weight would be closer to 15k which would give the appropriate margin for safety.

I mean…. It’s rated 1100lbs on tongue weight.

If you put 10k on the trailer nose I think you’ll have other issues

 

[dalton108]

Welp, this isn’t how, towing, or trailers, or loads work; but, it’s not going to help things, is it?

The maligning of this vehicle shows no signs of stopping or slowing down.

If Tesla wants to put this to rest, they’re gonna have to do something more about it than tweeting, I think.

 

[dalton108]

“LLM Everything’s” retort:

 

[cybercricket]

Breaking at the tow weight is not good.
When traveling 60mph a load shift, construction dip etc would send that weight close to 10klbs.
I was hoping the failure weight would be closer to 15k which would give the appropriate margin for safety.

I can't picture the physics for that, so help me understand. First of all, out of 11k some 3k is the trailer itself and it can't shift. Trailers are fairly balanced around the axles and don't put much weight onto the hitch by themselves. Then we have the load, say an 8k skid steer. Let's hypothetically say it does shift forward some... what's the weight distribution at that point ? I don't have the number in mind, but even if you put it as far forward as possible, I doubt there will be more than 2k or so on the hitch. Only then the dynamic load comes into the picture.

 

[cybercricket]

Jerry claims that the root of the problem there is the fact cast aluminum is "porous", thus the whole thing is weak. I believe that is inaccurate - indeed if gravity cast in ambient atmosphere, castings will have all kinds of issues. That's not what Tesla is doing - they're injecting molten aluminum at high pressure (hence the gigapress) into the die, which ensures no gas trapping. Additionally, while aluminum behaves differently from steel when failure limits are reached, most aluminum parts can be engineered to be equally as strong as steel parts or even stronger. Thickness, geometry choice, reinforcement ribs, can all ensure that the part will not fail at any desired limit. In this particular situation Tesla's design for the rear casting to accommodate the bumper mounting was likely done with the deliberate limits in mind, we can hardly suspect they made a mistake.

 

[Crissa]

“LLM Everything’s” retort:

Wow, ChatGPT was channeling some snark.

Remember, kids, LLMs don't know if anything is true or not, and just follow with matching words or phrases to complete grammar.

The actual answer is that static loads under motion become multiplied as dynamic loads. So if you put a 1000 lbs on it and jump a curb or pothole, that 1000 pounds gets accelerated and multiplied by the drop.

Which is why it didn't break until the total load hit 10x the static limit.

-Crissa

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