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mongo

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Put more simply, crash into the back of any truck, then be shocked when part of it breaks off.

Also, I'm not sure, even if it didn't get crashed/dropped, if the back wouldn't have gotten ripped off anyway. I mean, no one, NO ONE, ever lets slack get into a tow rope, let alone a CHAIN with ZERO give/play. If you watch the video, they do a running start with a ton of slack, the truck goes a foot before getting stuck on the sharp edge of the concrete, comes to a complete stop, and then it snaps. I'd love to see the exact same thing on any other truck!
The F150 is driving in reverse for the first pipe. Then, when it sinks into the second dip, it applies the brakes instead. The Cybertruck still manages to pull it partway up the pipe.
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HaulingAss

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That was such a weak rebuttal. If the hitch was rated at 1,100 lbs then the hitch should have broke, not the casting. Are you saying the casting on a truck that weighs 6,000 lbs can only withstand 1,100 lbs?
Some people shouldn't play engineers on the Internet.

A hitch designed to handle 1,100 lbs. of tongue weight can withstand vertical forces much higher than that, perhaps 100,000 lbs. or more of static force. But the culvert drop probably applied a force of more than that, in a direction the hitch is not optimised for.

That's because the concrete isn't going to have much give to it. That makes the "stop distance" extremely small, which rapidly multiplies the g-forces experienced.
 

HaulingAss

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The F150 is driving in reverse for the first pipe. Then, when it sinks into the second dip, it applies the brakes instead. The Cybertruck still manages to pull it partway up the pipe.
I would be hard pressed to design a setup that could apply more force to the tow hitch than the culvert setup. I mean, they could have put a bunch of slack in the chain and accelerated up to 30 mph on level ground, jerking the F-150 backwards, but then the amount of force they were applying would have been obvious, even to non-engineer types.

The setup they actually used was quite devious! Anything to try to make a superior thing look inferior.
 

mongo

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I would be hard pressed to design a setup that could apply more force to the tow hitch than the culvert setup. I mean, they could have put a bunch of slack in the chain and accelerated up to 30 mph on level ground, jerking the F-150 backwards, but then the amount of force they were applying would have been obvious, even to non-engineer types.

The setup they actually used was quite devious! Anything to try to make a superior thing look inferior.
Yeah, pulling angle with front end in a steep rut is hella mechanical disadvantage.
 

Ray in montana

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From The Bearded Tesla:

The Tesla Cybertruck is unlike any truck before it, and although some are attracted to the truck for that very reason, the way the truck is built is also very different from traditional trucks. When it comes to the structure of the Cybertruck, no compromises can be made given the high levels of claimed capabilities.​
YouTuber WhistlinDiesel just recently posted his long awaited video where he utterly destroys the Cybertruck. In this video, he submits the Cybertruck to a gauntlet of torture that would destroy any truck, and in the end, the truck was still functioning somehow.​
Comparing the Cybertruck to a "real truck" was the purpose of the video in question, and in that torture testing, a critical failure occurred in the structure of the Cybertruck. While pulling a stuck F-150, the rear end of the truck completely snapped off.​
At first it was hard to understand how this could possibly happen. At closer inspection, we can clearly see the truck failed at the casting, which is the frame of the truck. Essentially, the casting snapped in half, releasing the trailer hitch with it. Left with a snapped rear casting and a tow hitch that has completely let lose from the truck, it raises a lot of questions about the strength of the truck for towing.​
It is extremely important to understand how a casting works, how the Cybertruck is engineered, and the circumstances leading up to the ultimate failure in this case. The Cybertruck is undoubtedly engineered to be extremely strong, and even claims the designation of bullet proof. But all vehicles, no matter how tough, do have failure points, and in this case, the abuse the Cybertruck was submitted to ultimately caused a catastrophic failure.​
During a segment of the video, the Cybertruck is driven across a row of 4 foot culverts. At the end of the row, the Cybertruck gets stuck and is pulled out with the F-150, and when it clears the last Culvert, it is dropped with force on the rear of the truck and the Culvert and then again on a concrete spike on the ground.​
The Cybertruck is rated to tow 11,000 lbs and a tongue weight of 1,110 lbs. In this case, a more than 6k lb truck was dropped right on top of the trailer hitch, and rear structure of the truck from a height. The vertical forces that the rear of the truck were submitted to were well beyond that of any truck on the market today is rated to handle. This ultimately led to the failure we later see when the F-150 is attached to the rear of the Cybertruck and pulled hard.​
Having towed nearly 10k lbs across the country, I can say from experience and with confidence that the Cybertruck is more than capable of towing massive loads. It is also safe in doing so and to submit the truck to destructive testing does not represent the trucks overall structural strength.​
Thank you for that.
 


igs

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Some people shouldn't play engineers on the Internet.

A hitch designed to handle 1,100 lbs. of tongue weight can withstand vertical forces much higher than that, perhaps 100,000 lbs. or more of static force. But the culvert drop probably applied a force of more than that, in a direction the hitch is not optimised for.

That's because the concrete isn't going to have much give to it. That makes the "stop distance" extremely small, which rapidly multiplies the g-forces experienced.
Tell that to Bearded Tesla Guy and yourself. He said 6x the force, so that's 6,600 lbs, which is nowhere near your claimed "more than that" 100,000 lbs.
 

Jhodgesatmb

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That was such a weak rebuttal. If the hitch was rated at 1,100 lbs then the hitch should have broke, not the casting. Are you saying the casting on a truck that weighs 6,000 lbs can only withstand 1,100 lbs?
It may in that dimension. If the rated tongue weight is 1,100 lbs then it would be overkill to design it to withstand more than 3X. And it isn’t the whole casting; just those parts the hitch is attached to.
 

igs

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If the rated tongue weight is 1,100 lbs then it would be overkill to design it to withstand more than 3X.
I agree. But @HaulingAss thinks its more than 100x. He must be an engineer. On the internet.
 

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I agree. But @HaulingAss thinks its more than 100x. He must be an engineer. On the internet.
The impact force applied when it smacked down on the concrete after the culvert was likely in the 200,000lbs or more range. A steel hitch may not have sheared off, but most certainly would have been bent so far out of shape to be unusable.
 

carsly

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You’re all taking the bait, there is nothing to analyze.

This is wanton destruction for the purpose of entertainment, nothing more. Why else fill a G63 with concrete? Testing? LOL, no. Think Jackass but applied to vehicles. That’s it.

Oh, and WWE is not real wrestling for those examining the finer technique points of a suplex off the top rope via-a-vis Olympic wrestling.
 


Bhcyber

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Thank you for making this video to help clarify the misinformation. However, WhistlinDiesel's 'testing video' causes damage, as many Tesla haters and nonbelievers will take his video as an 'I told you so' moment.
 

HaulingAss

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Thank you for making this video to help clarify the misinformation. However, WhistlinDiesel's 'testing video' causes damage, as many Tesla haters and nonbelievers will take his video as an 'I told you so' moment.
That's OK, it's their loss if they can't separate truth from fiction. In my experience, people that are poor at discerning the truth generally have a harder time of life in general. Not everyone can be in the top 50%, half the people have to occupy the dumbest 50%.

That's the way it's always been. ?‍♂
 

mongo

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This is akin to hitting a nail with a hammer. Much higher force than just pushing on the nail with the hammer, but how much higher?

If Cybertruck dropped 1 meter, that's a time of 0.45 seconds and final velocity of 4.41 m/s.
Acceleration required to stop the vehicle depends on the time the deceleration happens. If the back half is 3,500 pounds, then you hit 100,000 pounds if it takes 28.6gs. Knock one off for Earth and you get 27.6gs
27.6*9.8 = 270.48 m/s²
4.41 m/s / 270 m/s² = 0.016 s or 16 milliseconds
Assuming constant deceleration (unlikely, but easier) distance traveled = 0.016*4.41 -0.5*270*(0.016)² = 0.036m = 3.6cm = 1.4 inches

So, if the body and block flex less than 1.4 inches on impact (or drop is higher, or deceleration is nonlinear), then it would reach 100,000 pounds.
 
 








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