Live data from Hacker News

A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

techcrunch.com

181–190 of 560 posts

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#181
post #155
post #109

Earlier quoted context omitted.

They do the tests to validate that this rocket won't turn into a cruise missile, headed for the nearest residential area. Not an impossible scenario. Lots of energy stored up in one of those rockets. Just like when we test software, they want to have everything as close to what they would expect on launch day as possible (2 days from now). All the stresses, the structure, etc. That means putting stage 2 and the paylo…

Nitpick: you're thinking of a ballistic missile. Cruise missiles are more like exploding fixed-wing drones. The V-1 flying bomb was a cruise missile, and the V-2 rocket was a ballistic missile.

If a fully loaded (cryogenic fuel + oxidizer) SpaceX rocket did a belly flop into downtown Orlando I suspect this distinction would be quite meaningless to the locals!

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#182
post #175

Earlier quoted context omitted.

It's a deal breaker most likely, the terms of the deal were based on AMOS-6 becoming operational by march 2017. There has been high level of criticism in Israel about the deal as many seen this as giving up it's sovereignty over its space platforms even tho under the deal the all operations of spacecom platforms would be still handled from Israel proper, I'm sure the r/conspiracies is already booming with sabotage th…

Sounds like SpaceX just killed multiple deals for this company. Could someone who knows about this kind of stuff (I assume this subset of the population is small) comment on whether there is recourse against SpaceX for losing the payload?

Unfortunately accidents happen, I have a feeling that some insurance company somewhere is going to end up paying for the damages...

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#183
post #105

Earlier quoted context omitted.

You're advocating the Broken Window Fallacy. http://www.investopedia.com/ask/answers/08/broken-window-fal...

Not quite. The Broken Window Fallacy hinges on the fact that the son breaks the window for a reason that doesn't further any other economic cause. That is, he didn't break the window for research, so nothing new was gained from it. Resources were merely shifted from the shopkeeper to the glazier. When it comes to innovation, however, failure is often the impetus to more efficient design. Not only was that $200m shift…

You can't say that all mistakes are worthwhile just because they reach us that we shouldn't make those mistakes... We already knew that. That wasn't research, it was a prelaunch test, and it failed.

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#184
post #105

Earlier quoted context omitted.

You're advocating the Broken Window Fallacy. http://www.investopedia.com/ask/answers/08/broken-window-fal...

No, in this field sometimes stuff blows up unexpectedly and it's part of the cost of doing business. It's like feeling bad for a life insurance company when someone dies.

[deleted]

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#185
post #174

Earlier quoted context omitted.

It's a deal breaker most likely, the terms of the deal were based on AMOS-6 becoming operational by march 2017. There has been high level of criticism in Israel about the deal as many seen this as giving up it's sovereignty over its space platforms even tho under the deal the all operations of spacecom platforms would be still handled from Israel proper, I'm sure the r/conspiracies is already booming with sabotage th…

Won't they just relaunch in a few months? Not sure what the rebuild timeline is.

It takes years to build a satellite, the bus, and every component is purposely built each component and the satellite itself goes through months of testing and even if they could build one within 6 months all of the contracts would expire by then which will require Spacecom to open the bids again.

All of the contracts were based on AMOS-6 being operational by a given date, AMOS-6 has been "under construction" for probably 4-5 years, SpaceX was selected as the launch contractor in late 2012 originally for a mid 2015 launch but the launch was delayed for various reasons.

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#186
post #179
post #109

Earlier quoted context omitted.

They do the tests to validate that this rocket won't turn into a cruise missile, headed for the nearest residential area. Not an impossible scenario. Lots of energy stored up in one of those rockets. Just like when we test software, they want to have everything as close to what they would expect on launch day as possible (2 days from now). All the stresses, the structure, etc. That means putting stage 2 and the paylo…

Insurance isn't magic pixie dust, it just moved the cost around.

If the organization underwriting the insurance is implicitly and explicitly insured (too big to fail) by the US govt, it might as well be magic pixie dust!

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#187
post #174

Earlier quoted context omitted.

Won't they just relaunch in a few months? Not sure what the rebuild timeline is.

It takes years to build a satellite, the bus, and every component is purposely built each component and the satellite itself goes through months of testing and even if they could build one within 6 months all of the contracts would expire by then which will require Spacecom to open the bids again. All of the contracts were based on AMOS-6 being operational by a given date, AMOS-6 has been "under construction" for pro…

Would it go faster the second time around, since they've already validated the design?

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#188
post #125
post #114

Earlier quoted context omitted.

> They do the tests to validate that this rocket won't turn into a cruise missile, headed for the nearest residential area. In that case the rocket has a flight-termination system, though, which should activate as soon as it veers too far outside the planned/expected parameters of the flight.

For more context, all (edit: American!) rockets for decades have had onboard self destruct systems and a "Range Safety Officer" on the ground whose entire job is to determine if and when to deploy this self destruct system. The cruise missile scenario is highly unlikely as the rocket itself would be destroyed soon after leaving its intended trajectory.

How often is the self-destruct mechanism tested?

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#189

Earlier quoted context omitted.

> A $200 million loss there, which sucks for the insurance company but better than losing a $2b custom government bird. In fairness, when did the government last lose a bird? Doesn't the ULA have a '100%' success rate (where success is getting payload to space, though some payloads fail to make it to the planned orbit)

I suspect the $2b custom government bird refers to the space shuttle. Of which we have, in fact, lost more than one.

That figure's low by a factor of 100 for the Space Shuttle program.

Re: A SpaceX Falcon 9 rocket has exploded at Cape Canaveral

#190

Earlier quoted context omitted.

It's pretty well documented that people at SpaceX work 80+ hours a week consistently: https://www.quora.com/How-many-hours-a-week-does-a-typical-S... http://spacenews.com/op-ed-3-things-to-know-if-you-want-to-w... https://www.reddit.com/r/spacex/comments/25ixxq/is_spacex_wo...

Wouldn't be surprised if some overworked engineer made a mistake.

Wouldn't surprise me in the least. I know Musk claims that "working at Tesla/SpaceX is like being in the special forces", but there's no way that every employee at these companies has the work capacity to stay 100% focused through 80 hour work weeks all the time.
Post reply on HN