The damage was so massive that they have to rebuild entire portions of the Texas Launch Site. It's quite possible that the immediate failure of several engines on one side was caused by debris from the launch pad.

How build launch durable pads, especially when using powerful engines, isnt something we have to learn first by making mistakes. This is basic engineering 101 at NASA.

While i still cant get enough from vertically landing rocket stages and i deeply respect the work of Space-X engineers ... this ongoing, absolute reckless launch safety strategy (or should i say the lack of) does not bode well for manned missions.

"How is the engine going in durability testing? "We've been hyper-focused on proving the general operability, and showing that the engine works in these application demonstrators," says Shkolnik. "Now that it's pretty apparent that it's working, everyone wants to know how many hours can it run. We're working through that, it's part of what we're going to be doing over the next year. We're running engines for tens of hours, dozens of hours, we're not yet in the hundreds of hours where we want to be.

"We're not even running them long enough to think about things like seal replacement yet," he continues. "It's been a combination of little things we're addressing as we go along. "

Hmmm. So, not an actual engineer--why would a seal that's in the wall and has the rotor spinning past it do so much better than a seal which is in the rotor and spinning and spinning past the wall?

This response seems to have a few gaps in it, but here's what a company rep said:

"And then there's our apex seals, they're like our piston rings," he continues. "In the Wankel engine, they're inside the rotor, again. They move at a high speed, and bounce around, they're very hard to lubricate. In our case, they're stationary, they don't bounce around, and you can lubricate them directly from the housing.

"So we basically solved the key challenges the old rotaries had with combustion and with oiling. Those oiling challenges caused both durability issues and emissions problems. By making those components stationary, we solve the challenges of the old rotary. And we also upgraded its cycle to give it much higher efficiency."

https://newatlas.com/military/liquidpiston-rotary-x-engine-army-generator/

Can this be used to make parts more durable for transportation? cars, boats, planes?

Seriously; it's the durability of the bubble that's the trick here, right? I mean, is that really just soap and water? Or is there something really tricky cool about it?

guy spends more than just time on these restorations, he spends a good bit on paints and parts, what is impressive here is the result.

Its always going to be cheaper/easier to get a chinese knock off, but really the most impressive thing about these vids for me is how well made old stuff was. Premium shit was meant to last multiple generations. For most product niches nowadays, makers that care about durability are few and far between, on the contrary, designers and engineers have been punished by greed and beancounters doing a good job for their masters for committing the sin of making something that doesnt need to be replaced

When you have neither speed nor maneuverability, it's your own durability that is in question, not the opponents durability.

It took the capture of the Akutan zero, its repair, and U.S. flight testing, to work out countermeasures to the zero.

The countermeasures were basically :
- One surprise diving attack and run away with momentum, or just don't fight them.
- Else bait your pursuer into a head-on pass with an ally (Thatch weave) (which, is still a bad position, only it's bad for everyone.)

Zero had 20mm cannons. The F4F had .50's. The F4F did not out gun the zero. 20mms only need a couple rounds to down a plane.

Durability became a factor later in the war, after the U.S. brought in better planes, like the F4U, F6F, Mustang, etc... while the zero stagnated in near-original form, and Japan could not make planes like the N1K in meaningful quanitties, or even provide quality fuel for planes like the Ki84 to use full power.

History is history. We screwed up at the start of WW2. Hubris/pride/confidence made us dismiss technologies that came around to bite us in the ass hard, and cost a lot of lives.




Best rockets since the 1960's? Because it had the biggest rocket?
What about reliability, consistency, dependability.
If I had to put my own life on the line and go to space, and I had a choice, I would pick a Russian rocket.

-scheherazade

Cool.

I was interested enough to try to find information at circa.com, as suggested at the end of the video. Nothing immediately popped out at the top level domain, but a google search found a short story there where the last line was a link to her personal webpage:

https://yaniseho.com/the-bladress/

She's currently in Nebraska, with 169 days on the road and 2747 miles traveled. Not sure if she had phone/GPS issues or what, but there's a jump from day 93 to 119 as her position went from roughly NYC to Buffalo in that time.

I wonder if she's done any wheel and/or bearing replacements in her skates. Her frames/chassis look like Wizards (nice heavy-duty but light aluminum) with a quality boot that I can't recognize for sure but might be a Seba. Anyway, looks like relatively high-end, durable gear!

While slick, I have to question his claims of how durable it is, and wonder how long until the surface wears too much... if it lasts as long as felt, then bravo on them. The advantage of a felt table of course is that it can be recovered easily enough (I'd assume if you have enough to get a quality pool table, then recovering costs aren't a problem... now if you got a cheap pool table then there might be problems).

Comment hidden because you are ignoring dag. (show it anyway)

Is nobody going to mention the elephant in the room of how crappy the durability of paint on American cars is?

It's a clear example of planned obsolescence and a good reason why they don't make Oldsmobiles any more.

Another way of thinking of it, is consumer safes are sold on their appearance and spec sheet rather than their reliability.

These companies know that only select businesses and a minority of consumers will do their research.

Kind of similar to how consumer and business laptops differ in that business laptops tend to look very plain but are generally much more durable.

Actually blade thickness has a lot to do with cutting power. Having a nice sharp edge at a good angle helps with the bite of the blade - and a host of medieval and ancient swords had that - but blade thickness impacts how deeply a cut can go, the thicker the blade the harder the hit will have to be.

It's why your kitchen knives are measured in milometers. Beyond that thickness of a blade has a large impact on its weight (katanas are a shorter blade but heavier than most longer swords), how long the hilt needs to be (and katana hilts were significantly longer than the remakes of today) and more.

One might think the thickness is there for durability and certainly the blades were durable, it's why there are still some of the originals around today, but the real reason is Japanese steel wasn't very good and full of impurities while at the same time the Europeans were mass producing steel of a significant higher quality. I hear the Japanese folding process vaunted as the height of sword-making but the real reason they folded the steel wasn't because it was a superior process - it wasn't, pattern-welding was and it was used in Europe as far back as a millennium earlier - but because it helped spread those impurities throughout the steel. That extra thickness helped keep the impurities from ruining the blade as well.

The katana... it's beautiful, fun to wield, unique looking, has a treasured past but it just.. isn't.. a very... good.. sword.

Why would they do that? It's in their interest to make their phones as fragile as possible to sell more phones. If they make something too durable, people will just keep using it.
That's why they keep all the parts glued together..to force you to buy a new device as soon as even the smallest thing breaks.

Of course not, but alongside iOS updates which tend to slow the phone down I think it's a very intentional 'nudge' to upgrade the phone. With iPhone/iOS being something insane like >70% of Apple's profits (I think it's higher now) they really have to keep this kind of practice up to keep sales growth chugging along.

People will usually second hand the old device if they can. The more shameless practice is with printers that will arbitrarily stop working after a programmed number of prints.

I mean I think it goes without saying that Apple has the capacity to come up with a coating that doesn't scratch. It's not just Apple of course, if you split electronics by durable and regularly replaceable you find things like appliances are more durable that gadgets.