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SpaceX launch webcast: Orbcomm-2 Mission [video]

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Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#411

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Why is this downvoted? There is some serious tribalism going on in this thread. You all need to chill out and start thinking again. Who cares whether BO or SpaceX was first, or whether China or America was first? We should be happy that humanity is closer to Mars.

> Why is this downvoted I can't give the exact answer but if I had to guess, I'd say it's a consistently argumentative attitude under the guise of asking questions. The commenter has asked the same question "what makes this SpaceX thing so special?" at different points of this thread and has gotten many different answers providing a bunch of different view points. They're not trying to get clarity, they're trying to…

Sort of... I knew I would get downvoted, mostly because of my failure at SpaceX cheerleading ;)

I actually agree that SpaceX did an awesome thing, and really do understand that its more complicated, and difficult, and challenging, and so on, than what Blue Origin managed to do; yes. My point was more of a "HN loves SpaceX and cannot acknowledge that they might not be the best in the world at everything, ever" thing, rather than any technical breakdown. I would also maintain that the 100km altitude flight is important - it's the internationally recognised boundary of space - and that the 'first' that Blue Shepherd claimed was valid, since the SpaceX Grasshopper did not cross the 100km Karman line.

The important parts are that the flight is of a 1.) reusable, 2.) VTOL, 3.) rocket after a 4.) 100km altitude space flight. Since all four points are valid for SpaceX's Falcon 9 first stage booster, I think it's technically correct to place its landing in the same category as Blue Origin's New Shepherd landing. SpaceX's achievement is more technically interesting and useful, but that should not detract from what Blue Origin managed to do with a much smaller team and budget.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#412
post #398

I join in congratulating SpaceX for this awesome achievement. It's like, holy fuck, they landed the rocket AND deployed 11 satellites, all in a single Pomodoro! I also want to commend them for a few minor things: - a real-time stream from landing (as opposed to holding it and releasing footage few days later, as before) - a real-time stream from satellite deployment, with a camera placed so that we could see everythi…

It was also super cool to see the employee reaction. There aren't that many situations in business that warrant such a reaction. It's amazing to me how much power SpaceX has to both re-activate so (comparatively) soon after a failure and to delay the launch by a day solely for its own purposes (perhaps it's launch client gets a discount?).

They probably just have a well-planned contract.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#413

Earlier quoted context omitted.

I have a vague feeling he's being snide to pay Elon back for those mildly snarky tweets back when Blue Origin landed their rocket. EDIT: Musk: "Congrats to Jeff Bezos and the BO team for achieving VTOL on their booster" Musk: "It is, however, important to clear up the difference between "space" and "orbit", as described well by https://what-if.xkcd.com/58/" http://money.cnn.com/2015/11/24/news/companies/elon-musk-jef…

Randall must feel pretty snide when even Elon is referencing his comics..

I don't think you meant to say "snide" [1] which means "derogatory in a nasty, insinuating manner" but I can't for the life of me work out what you did mean to say instead before autocorrect (or typo) took over?

[1] http://dictionary.reference.com/browse/snide

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#414
post #340

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So, the falcon 9 could, in theory, do multiple attempts (given it has enough fuel)? If the first attempt doesn't work out, pull itself up a bit, correct, and then fall down again?

It doesn't have enough fuel, and keeping more in the booster would mean reducing the payload it could carry. I think most of the ways the landing could go wrong involve the rocket falling over, which wouldn't be recoverable (the fins do nothing at low speed, and the engine can gimbal but only a little bit).

On-pad airbags to cushion a toppling rocket that's had an otherwise near-perfect approach?

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#415

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That, and I want to see an Epic Rap Battle of History between Musk and Bezos some day. It will take a lot of competition and a lot of progress before they have enough dirt to throw at each other.

Hahaha... Thanks, that cheered me up. Someone should totally do rap battles while pretending to be some famous figure. The possibilities are endless. Faux Bill Gates vs Faux Steve Jobs.

Yeah, don't follow that link pnt12 posted until you have a whole afternoon to kill.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#416
post #263

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Good point. Orbcomm already paid off the booster. Now SpaceX can take it up for a joy ride for only a few hundred grand of gas and really fly the fins off it. I bet they relaunch this booster on their own dime as a demo.

I have no inside knowledge, but I'd suspect Orbcomm paid next to nothing for this launch. Between "You'll be the first launch since the last one... You know, that one with a small anomaly..." and fact that this was the first launch of a new version of the falcon 9 (with slightly different engines, cooler/more pressurized O2), I know that if I were negociating for Orbcomm, I'd ask spaceX to cross the last digit on the…

The launch service provider has the last say on the date of the launch. The customer provides orbital parameters, and the launch just needs to make sure that insertion happens. Delaying for weather is pretty common, and as long as the payload gets to where it's supposed to, everyone's happy. The Orbcomm contract wouldn't have had a launch date specified, except in terms of NET (no earlier than) or similar. The launch windows are decided by SpaceX based on the requirements, and are the other constraint, and there was a window on both days.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#417

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The whole Bezos/BlueOrigin thing is kind of sad. They are nowhere near a "club" with SpaceX. One of the huge differences (and there are many) is that Falcon 9 was doing 6,000 Km/hr (~4,000 mi/hr) when the first stage separated and turned around to come back. The path was not straight up, but rather one to launch the second stage into orbital flight (which reached 26,000 Km/hr and 600 miles of altitude). Then Falcon9'…

Bezos and Musk should NOT be on twitter for their sake. Imagine for a few decades no one tells you "no" or "you're wrong" and you have thousands of peons to kick around. Megalomania is 100% going to happen. Best just contain that behind closed doors.

Eh - I think a good bit of it is entertainment for public consumption. Competition keeps people interested. It's pretty neat how we've gone from two superpowers duking it out in a cold war to two rich dudes exchanging barbs on twitter.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#418
post #341

Earlier quoted context omitted.

And you suddenly introduce a single point of failure for the return part of the mission.

Can the first stage land with a failed center engine?

Theoretically it would still have ample thrust but I don't know about the other factors like gimballing and asymmetrical thrust.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#419
post #130

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New Shepard is able to make several compromises that make landing _much_ easier. New Shepard doesn't have to get anywhere close to orbital velocity, so it can use a far less powerful engine. That means it can throttle down far enough to hover. That is a _huge_ advantage over Falcon 9, which must time the landing burn perfectly to hit 0 velocity at the exact moment it touches the ground. They're in the same club like…

But the F9 first stage doesn't get to orbital velocity, either, remember. The achievements are comparable, despite the fact it makes SpaceX come second. Blue Origin was first with a VTOL rocket stage, as part of a space system.

At the end of the day, you could do what Blue Origin did with a balloon. The practical aspect of actually being able to put something on orbit is what's special.

Re: SpaceX launch webcast: Orbcomm-2 Mission [video]

#420
post #367

Earlier quoted context omitted.

Hahaha... Thanks, that cheered me up. Someone should totally do rap battles while pretending to be some famous figure. The possibilities are endless. Faux Bill Gates vs Faux Steve Jobs.

https://www.youtube.com/watch?v=njos57IJf-0 It's a bit silly, but entertaining. It doesn't get too technical, but usually gets the generic facts right.

Best Christmas ever. https://www.youtube.com/watch?v=0N_RO-jL-90 was hilarious.
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