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SpaceX’s Falcon Heavy successfully launches

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Re: SpaceX’s Falcon Heavy successfully launches

#821
post #747
post #740

Earlier quoted context omitted.

The damage to the ASDS might be more of a problem. Depending on how badly it was damaged, it might not be available to catch other cores that could have landed otherwise

It look cool to have them land on their own, but wouldn't it be much cheaper to use parachutes and drop them in the ocean !? Either way they are going to take them apart down to each bolt and then reassemble again to make sure there are no faults. You don't simply fill it up and relaunch.

AFAIK, there's no major disassembly between flights. Certainly inspection and test firing, but nowhere near the meticulous detail and overhauls that the Space Shuttle went through after each flight. This is a completely different beast than what many observers' mental models are accustomed to.

Re: SpaceX’s Falcon Heavy successfully launches

#822

I feel like I must be crazy, but did anyone else notice that the two videos from the pair of boosters seemed like they were cloned from the viewpoint of a single booster? I don't mean they look similar. I mean they look like they came from the same video feed . When completing the touchdown, they both seem to land at the same pad -- you can see the flame of the other booster and the pad the other booster is landing a…

Yeah, they accidentally used the same stream twice. Easy mistake to make.

Re: SpaceX’s Falcon Heavy successfully launches

#823

Yet another incredible show from SpaceX. At this point, if they said they were going to build a football stadium on Europa, my only question would be when does it open. But I couldn't help but laugh at the fact that they can launch a massive rocket on the first try and land (at least) 2 cores, but the camera STILL cuts out on the drone ship.

I don't find that surprising. The communication link back is presumably by satellite since it is in the middle of the ocean, and probably a directional antenna because of the high bandwidth. You have any good suggestions for having a reliable connection via directional antenna on a flimsy barge that a rocket is landing on in this middle of the choppy north Atlantic?

How about a camera feed from the tow ship (with a view like the two other boosters landing)? If you can film a rocket 300km in the air, you can surely spot a rocket landing 15 miles away. Unless ofcourse you don't want the world to see it crashing into the ocean live.

Re: SpaceX’s Falcon Heavy successfully launches

#824

I feel like I must be crazy, but did anyone else notice that the two videos from the pair of boosters seemed like they were cloned from the viewpoint of a single booster? I don't mean they look similar. I mean they look like they came from the same video feed . When completing the touchdown, they both seem to land at the same pad -- you can see the flame of the other booster and the pad the other booster is landing a…

They acknowledged it and uploaded a newer video where this is fixed.

Re: SpaceX’s Falcon Heavy successfully launches

#825

I feel like I must be crazy, but did anyone else notice that the two videos from the pair of boosters seemed like they were cloned from the viewpoint of a single booster? I don't mean they look similar. I mean they look like they came from the same video feed . When completing the touchdown, they both seem to land at the same pad -- you can see the flame of the other booster and the pad the other booster is landing a…

Yes, the feed displayed two videos of the same core. Not sure if this was explicitly acknowledged, but supposedly they fixed the error in the archived feed.

https://www.reddit.com/r/spacex/comments/7vg63x/rspacex_falc...

Re: SpaceX’s Falcon Heavy successfully launches

#826
post #363

Earlier quoted context omitted.

Okay, in my opinion it's a waste of resources because if it is at all, it is very bad art. (It took no discernment or taste to do; it's an empty, ostentatious gesture. Precious little discernment or taste in the predictable Adams reference, too.) (Disclaimer: I like Douglas Adams.)

Part of art is that not everbody likes it.

There's plenty of art that I don't like, but appreciate it for what it is trying to do. That's absolutely fine. I'm saying this isn't even worthy of that sort of appreciation.

Re: SpaceX’s Falcon Heavy successfully launches

#827
post #817

Earlier quoted context omitted.

amazing, is the car strapped to the outside of the rest of the ship? how does it remain so stable after the separation? by "sphere" i just meant the case it is shown inside of at the start, since the markings on the wall resemble motion tracking panels used for 3d projection. perhaps I just underestimate the precision and smoothness of the fairing separation, or am misunderstanding how the car is rigged so as to rema…

It's like putting a satellite into orbit, right? Up until the rocket stops burning, it's held in place by something, then it's released, then enclosure opens with minimal/nonexistent effect on the payload, leaving it out there... In this case, the car has enough velocity to float to it's Sun orbit, I guess.

No, the 3rd burn took it from earth orbit to sun orbit.

Re: SpaceX’s Falcon Heavy successfully launches

#828

Earlier quoted context omitted.

What are you talking about. That gif is showing the fairing separation. There's no sphere.

amazing, is the car strapped to the outside of the rest of the ship? how does it remain so stable after the separation? by "sphere" i just meant the case it is shown inside of at the start, since the markings on the wall resemble motion tracking panels used for 3d projection. perhaps I just underestimate the precision and smoothness of the fairing separation, or am misunderstanding how the car is rigged so as to rema…

This is what the payload looks like: http://st.motortrend.com/uploads/sites/5/2018/02/Tesla-Roads...

Re: SpaceX’s Falcon Heavy successfully launches

#829

Earlier quoted context omitted.

I think a good-faith reading of the parent commentary is that he was talking about the mannerisms and language and overall appearance of the person, not that he was white-skinned and a man. Immediately assuming he was saying he looks like an engineer because he isn't a women, or dark-skinned, is ironically a racist and sexist assumption.

I find it fascinating that SpaceX manages to pull off one of the most amazing things in the history of humanity and the top comment thread here on HN somehow manages to get bogged down in discussing race, gender and sexual orientation as it relates to the "hosts" of the live stream. These are important issues to be sure, but the self appointed thought police of generation "I'm offended" who feel the need to instruct…

>SpaceX manages to pull off one of the most amazing things in the history of humanity

Whoa there. They launched a rocket, one not even heavier than the 50 year old Saturn V. This is not the most amazing thing that ever happened ever.

Re: SpaceX’s Falcon Heavy successfully launches

#830

Did they need to modify the Tesla to make it vacuum worthy? Like, remove any fluids, remove any parts that might explode in the hot or cold of space, deflate the tires, etc. Note: I'm more interested in a scientific answer, as opposed to casual conjectures. Preferably from an engineer knowledgeable of such things. And specifically, the materials sciences aspect of how materials will survive in a vacuum.

The metals in the are likely to sublimate significantly over the course of tens of thousands of years. Plastics and rubber might only last decades. Painted surfaces might survive longer than exposed metals.

The glass will eventually become clouded and discoloured due to radiation damage and scoring by micrometeorites. Some plastics can rapidly deteriorate in sunlight.

Erosion from micrometeoroids (dust) and larger impacts is also a factor over timescales of thousands of years.

I doubt it will last the millions of years that is suggested.

http://www.dtic.mil/dtic/tr/fulltext/u2/266548.pdf

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