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SpaceX launch webcast: Orbcomm-2 Mission [video]

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

#61
post #20

Stuck the landing! Congratulations! 10/10. Would land again.

Got my daughter out of bed at T-5 to watch the launch sequence and possibly history being made. Thrilling to watch it with her, tried to give her an idea of how momentous this is. Wonderful. Congrats to all at SpaceX!

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

#62
post #50

I must have missed it, but can anyone explain why Orbcomm wants 11 satellites in the same orbit? The stage 2 engine isn't firing in between letting the satellites go.

Leo, they are so low they don't cover a whole lot of territory. The oribits may be at slightly different altitudes simply because of the inertia of the second stage, I really should have monitored that altitude indicator during the releases, were they identical?

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

#63

"Congrats @SpaceX on landing Falcon's suborbital booster stage. Welcome to the club!" Oy... someone needs to tell Bezos it's a whole different scale than what he did. https://twitter.com/JeffBezos/status/679116636310360067

"Welcome to the club"? Wow, that was classless. What Blue Origin did was impressive, but it was utterly trivial compared to what just happened with this flight.

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

#64
post #27
post #20

Stuck the landing! Congratulations! 10/10. Would land again.

Completely amazing! I'm sure I heard a "holy shit" or two there in the audience. :) EDIT: One question for the rocket scientists here: exactly how reusable do they expect these returned first stage rockets to be? What is the process of certifying that a returned rocket is fit to fly, and what components are most likely to need repairing/replacing with each launch?

This is in the "to be optimized" bracket. If they can get any kind of consistency landing even heavily strained rockets, they can reframe/readjust/redesign as necessary (like adding more support in areas etc).

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

#67

"Congrats @SpaceX on landing Falcon's suborbital booster stage. Welcome to the club!" Oy... someone needs to tell Bezos it's a whole different scale than what he did. https://twitter.com/JeffBezos/status/679116636310360067

Dear Mr Bezos: people will care about your rocket when you offer free shipping to space for Prime customers

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

#69
post #57

Earlier quoted context omitted.

NARS but probably comparable to shuttle engines and body.

The first stage rocket doesn't go nearly as high or as fast as the shuttle though, no? AFAIK the shuttle had to have its heat shield replaced after each return trip, and it landed aerodynamically rather than via rocket power. I'd presume that the powered descent of the first stage means that it doesn't need any sort of heat shielding, at the expense of more stress on the engines, thus requiring a bespoke inspection p…

It doesn't have a heat shield because it simply doesn't go fast enough relative to the atmosphere to need one, it does not 're-enter' the atmosphere at nearly the same horizontal speeds the shuttle did (from full orbital velocity down to landing speed). Even so, the stresses from heating up, cooling down, launch and landing are such that they will likely magnaflux that whole thing from one end to the other just to be sure there aren't any defects, especially until they have more experience, they'll pick it apart and inspect each and every bit to see how well it performed. Later on when they have much more data they might decide to swap out parts only every so many launches if possible.

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

#70

Not sure if the "USA" chant after the first stage landed was warranted.

ITAR[1] means that practically everyone working at SpaceX is either a US citizen or permanent resident.

1. https://en.wikipedia.org/wiki/International_Traffic_in_Arms_...

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