Nuke

while the gamepad memes are amusing, it didnt make the pressure hull implode. unless one of the tourists got mad and threw the controller at the inside of the tube. it would be amusing if they recovered it.

dont feed the ceos. it just enables them to fail in more expensive ways.

so long as the pad doesn't explode again i think they can just keep throwing things at the wall and see what sticks.

its just a lot easier to derive all your clocks from a higher clock than a lower one. you can sync to a clock but that requires extra circuitry. if instead your pixel clock is an integer multiple of your line clock, and the line clock is an integer multiple of your framerate, then you dont need to worry about sync. it then just becomes a matter of counting clocks and you can get all your timing signals off of a crystal-driven reference clock and a single clock divider ic. tv also has the trouble of sinking up to a radio signal which is why they use such weird base frequencies.

yea but the failure rates are a good starting point for determining if it is a good idea or not. if instances of explosions or pressure loss on the tanks are zero or of such low probability that you can effectively ignore it, then it becomes worth considering. then it would take actually testing it to see if its viable or stupid or results in a maintenance problem that affects turn around and thus launch cadence. since you separate with fuel in the tanks, the possibility exists of actively cooling the interstage with cryogenic fuel for a couple seconds while you start your engines. the potential benefits of hot staging, should it work as designed, are still worth investigating.

seems like an unnecessary stress on the payload, especially if that payload is humans. hot staging is a better known quantity, since its been used a lot by the russians. how many instances of hot stage failures resulting in explosions have their been?

testing every possible thing until something sticks is a good way to move quickly, if they dont get regulated into oblivion first because of all the explosions.

hot staging on top of a stage with fuel in it for landing just seems like a bad idea.

initially perhaps, but having used several crt monitors a wide array of refresh rates and resolutions were possible. clocks have been derived from crystal oscilators. tv (ntsc) famously used a 35.8mhz oscilator which is most decidedly not derived from mains frequency, and this is not new technology by any means (tv refresh rate was 29.97hz, not 30). more modern crt monitors had programmable oscillators to give them more flexibility in the video modes they supported. mians frequencies were still an issue, but there are more ways to deal with that noise than syncing to mains.

yea i was surprised by that myself. i dont see the advantage to using carbon fiber because weight saved just means you need to carry more ballast to cancel out your buoyancy. a tiny air bubble in an acrylic dome or an inclusion defect in a casting is enough to reject the part as structurally unsound. even a metal hull would need to be thoroughly x-rayed to make sure that there are no defects. acrylic can be visually inspected for being transparent. idk how you go about removing or even detecting similar defects in a laminated structure like carbon fiber composite.

i think its more the illusion of altruism. sometimes its real, but thats rare. sometimes it aligns with self interest, which i believe is the case here (perhaps expecting a payout either directly or through litigation after the fact). but people do a lot of things that seem good on the surface, but apply any scrutiny you find that its either grossly ineffective, completely unnecessary, or downright counterproductive.

james cameron was just talking about it on the news. i missed half of it. carbon fiber works up to a point and then fails catastrophically. with the number of rotor blades ive destroyed trying to fly rc helis, i know.

failing to disclose all the risks is fraud. lets see their waiver hold up in court if that happens. not to say that the involved parties wouldn't find some other way to sue the sub operators. or that even the would be rescuers wouldn't seek compensation for their efforts (especially considering there is at least one rich dude on board). one thing is sure, the lawyers will get rich off of this.

taking risks on a long enough timeline will inevitably lead to deaths. it is unavoidable. its a matter of personal responsibility to accept any risks you may chose to take. if you are handed a waiver it usually means that a corporate bean counter figured out the death rate for a given activity, figured out that it is not zero, how much it would cost per instance, determined the cost over time, and decided that it could not afford to engage in that activity if they had to pay the price of such inevitabilities. in other words, a safe world is a boring world. we all have to take measured risks, driving, flying, eating sushi from the convenience store, dating that one freaky girl everyone else is afraid of, survival demands it. some people are willing to take a little more than others. and im sure everyone who got into that sub was aware of what they were doing.

if they do manage to save these guys, it will be the modern day apollo 13.

i for one refuse to step into a submarine without a boom box, and the complete works of slayer.

well maybe it will take the wreck claiming a few more lives to change that. but so long as there is no blatant looting im fine with it. although sea life has probibly eaten all the human remains at this point. but these expeditions are not cheap, you need an entire ship and its crew to pay for, to drop a small sub 2 miles into the ocean to take photos, scans, etc. i see this more as creative funding of research rather than grave robbing. if were being honest, all the world is a mass grave. does that mean we shouldn't live on top of it?

i meant more for safety reasons. it is a 100 year old wreck and could collapse at any time. dive/submersible operators tend to be very safety conscious. of course if you got a rich guy in the back seat who wants to get closer and claim that they are entitled to violate safety rules because they footed the bill, its a different matter.

i think the idea is you take a couple of rich tourists along to fund the expedition. you are still doing scientific things but you got a couple people on board for the ride. but if you are carrying tourists, you really should be keeping safe distance.

as a life long pedestrian i hate when cars slow down and let me cross when it would be faster for everyone if they just zoom through and clear the intersection before i get there. people who don't need trucks but own trucks, and that's not enough, so they need a lift kit, truck nuts and an exhaust mod just so everyone can see them compensating for their deficiencies. i mean its one thing to have a truck if you are a blue collar worker who needs to transport tools, lumber or other materials around as part of their job. but they are really impractical as a family vehicle. so when i see a family of 6 pile into a truck, where half the kids dont have seatbelts and a completely empty truck bed, i have to question their life choices. there is that subset of drivers that like to put a spoiler on random 4-bangers, which is the inverse of the truck nuts crowd. they might put an after market stereo in it, but its probibly no better than what came stock. they are less troublesome except when they play their crappy dance music really loud with the windows down. i use them to parallel modern computer builders who use water cooling they dont need and leds on all the things in an grossly oversized case, but running middle tier hardware. i hate cars. i dont like riding in them, driving them or dodging them.

wouldnt they have heard a big crash on sonar if they hit the wreck (or vise versa)? planting into the silt would have made less noise, but enough to spike on sonar. an implosion would have also made noise.

how close to the wreck were they allowed to go?

look up explosive forming on youtube. its easy to turn a polyhedral (easy to build/weld) into a sphere using explosives.

thats why you only create a cloud of shrapnel in the terminal phase, same idea as aa flak.

pi tablet hulk has been in the desk for several days and has only lost 1% charge on standby. thats an order of magnitude better charge retention than my previous power solution. thats what i get for using a simple schottky diode for power oring instead of the complimentary mosfet you are supposed to use. i guess next i got to measure idle run time, leave it up for 24 hours with some burn in load. i can also save some power by disabling ethernet and usb, but thats for later experiments.