One of your best. And so many layers of relevant points made. I was curious about the title on the can lurking in the background...and then you started the demo... Tried not to laugh, really, I swear...🙊🙊

Great commentary and fantastic crush demo! Thanks!

Those in the 'know' knew it was a body recovery mission within hours of it going missing. They heard the bang, at the exact same time the coms dissapeared. It was quite strange the media dragged it out giving people false hope for several days afterwards.

Love to hear about your back ground as you definitely have an understanding of interesting topics and great at explaining things

Amazing video well explained the submarine part, not everyone can think of good ways to examplify something let alone understand the physics. This is just a cool random youtube channel I'm so happy to be subbed to, greetings from Mexico.

Great video, great watch. The Oceangate submersible certainly had design flaws as you mentioned. But the real culprit was the lack of protocol to analyze how fatigue stress was effecting the hull. Fatigue stress is material stress resulting from repeated cycles of loading and unloading. I can't remember how many dives this sub had completed but I think it was over the course of a year or more. Every decent and ascent is an extreme loading cycle. Materials that are strong under static loads can behave very differently when subjected to cyclic loading. One great example is a wire coat hanger. The wire is quite strong in static cases and coat hanger wire is used successfully for many different ad hoc mechanical situations. But if you simply grab 2 ends of a short piece and bend it back and forth, cyclical loading, it will snap in short order. Carbon fiber is similar as it is a brittle material that develops micro cracks during cyclical loading. These cracks become magnified and tend to propagate through the material during loading cycles. It was just a matter of time before this effect caught up with the number of dives, the fatigued material failed and the vessel imploded. Proper protocol would be to allow the sub to perform a few dives, like less than 5, and then retire the hull to be dissected, sectioned, micrograped and completely studied so the next sub could be designed to be safer. His design worked, for awhile, until fatigue stress caught up with it.

*I've been watching your videos for a while and also a subscriber. After watching this particular video I felt the need to make a comment because of the talk of what happened recently.* *Your demonstration of what happened to the Titan is exactly how I explained it to my wife. This video was very well explained. Thanks for talking about this and your explanation. I will definitely show this to my wife. Very sad for the crew that lost their lives.* *Stay safe! Big Mac Sam*

Thought I misunderstood the discussion @2:15 until finding the mentioned Oceangate hull manufacturing video. Agree - watching them wrap successive layers perpendicular to the length axis of the cylinder (and hand skive) without changing the wind angle appears very odd for filament wet winding even in Aerospace

Great observation regarding the one-way weave not being optimal.

Love the channel! 👍🏻🇺🇲

Thank you for a most interesting video & demonstration...2 questions...1st, the sub flattened as you demonstrated...would it stay that way, or would it further desintegrate as it sank to the sea floor? 2nd...there have been stories that people want to bring up the remains of these folks - considering the forces involved, would there be anything to bring up? I am not trying to be morbid or disrespectful, I am just trying to understand....would these poor folks have instantly "ignited" due to the implosion & disappeared, or would their physical remains been reduced to a "liquid" state & dissipated as the broken remains of the vessel sank to the sea bed ?

really good video doc

I thought I'd spotted a Subby on that wrist. Ah, it was a Sea Dweller.

I remember the Specialized Ultimatre (carbon tubes bonded into Ti lugs) and the Trek OCLV (all carbon but still tubes bonded to lugs) in the early 90s, any earlier and I would have been too young. Regards PlayStation controllers, I've heard of gaming controllers being used in some surprising situations including military applications and commercial ROVs (remotely operated submarines used by the oil/gas industry) so that on its own isn't necessarily a bad sign.

I loved science class today thanks for the lesson doc, made alot af since using ur Rolex 4 reference

So your into bikes, cool, me too, my whole life, up until I had my hips replaced 20 years ago? Been into them since I was a kid? Absolutely love quality of all types of bikes, especially road bikes? I never was able to get a super premium ti. or C/F framed setup growing up kinda poor? The best bike I had was Cannondale mountain bike in the late 90's? $2K for a bike then, was pretty expensive, but I'd easily build a custom bike today for $20K, if I had dough and could still ride? Not a huge fan of carbon fiber, but I like my Renolds steel frames and titanium especially? I still have a Trek USA road bike, with a Shimano 600 group, nothing special, but parts? Have Campy cranks and a sweet set of 90's race wheels with Campy hubs and high end Ambrosio Tour De France worthy rims? Unfortunately, quality isn't cheap in bikes, and especially tools?

Great conventional demonstration with that can!

There was a reason he had a difficult time finding a company willing to mold the sub. The fact that every sub built has followed strict guidelines in material, thickness and design says alot. This was a disaster in the making from the time he thought "i can build it cheaper and lighter in my garage.

Great demonstration! Very informative. Thanks Doc.

Thanks doc!

Very well made video , well done Doc 👏

What do you do for a living doc? You seem incredibly knowledgeable on many different topics.

Wow this was awesome!!

Nice watch Doc. Great deep dive of info. 👍

Carbon fiber wasn’t a problem, titanium wasn’t a problem, the front glass wasn’t a problem. The problem is the properties of mixed materials. Titanium expands and contracts differently than carbon fiber. It’s a flaw to mix metals or materials in this case that have differences in how it handles the different pressures.

Great video explanation. I also own a Deep Sea. Absolutely love this beast of a watch. Hasn't left my wrist since 2013.

Thanks for the video demo. Very informative. Just a point on R. Sea Deweller I believe it has been around for a lot longer than 2012 that you were exposed to it in Italy. It only comes as far as I know in stainless steel unlike the submariner version, forgot its depth limit.

Great video sir!

Gluing carbon tube, directly to Titanium flange ......wtf

Great video and explanations. I like your Rolex watch. Unfortunately the titan submarine is different from your watch. Your Rolex is officially certified,and tested. In the news everyone is talking about the submarine which is not tested and certified by a third party. If this is true is just sad, and maybe in the future they are learning the lesson.

love the vids doc ! Sick watch to

Sometimes people need to know that you shouldn't push limits and try to reinvent the wheel just because you can. That's why so much of the so called " music " today is terrible and headache inducing. There are certain things that just weren't done before for a good reason.

👍😎👍

Just a can here ... Nothing to infer here😂😂😂

My dream watch

Carbon fiber does best loaded under tension... it doesn't do so well under the remaining four 'basic stresses'; compression, shear, torsion & bend.

Submersible not submarine!