Author Topic: POLL: SpaceX Accomplishments - F9 SECOND STAGE (Read 16354 times)

oiorionsbelt · « **Reply #20 on:** 01/15/2014 10:21 pm »

Quote from: Lars_J on 01/15/2014 08:31 pm

I voted none of the above. 2nd stage reuse is years away, I think.

Quote from: Mader Levap on 01/15/2014 08:38 pm

Second stage recovery/reuse in any shape or form? In 2014? Forget it.

So do you guys think there will be an attempt? Like they did on the very first F9's when 1st stage recovery was attempted even though it failed and a whole new approach was initiated.

intrepidpursuit · « **Reply #21 on:** 01/15/2014 10:49 pm »

Voted for none of the above.

I think it is possible that they will announce further plans, maybe unveil a second stage with a heatshield and we will start speculating about when they will try to use it. They have too much backlog to risk making major changes to S2 right now. If they make an attempt to reenter it will be atop FH...

CuddlyRocket · « **Reply #22 on:** 01/16/2014 01:30 am »

Quote from: rockinghorse on 01/15/2014 05:38 pm

I think that they will try to do some crazy controlled re-entry attempts, without much hope for success, in order to gather as much data as possible.

Exactly. It's pretty straightforward and costs little to attempt a return, recovery. All data is useful. But I don't think they'll try anything with much serious hope of success this year, when they'll be concentrating on the first stage and the other little things on their plate!

DJPledger · « **Reply #23 on:** 01/16/2014 08:25 am »

No way will SpaceX attempt to do any reusability testing on F9 2nd stage this year. They need to get 1st stage reusability working reliably first before they do any work on 2nd stage reusability.

Bargemanos · « **Reply #24 on:** 01/16/2014 01:49 pm »

Voted for "Re-enter the atmosphere intact".
Just to gather as much information as possible.

This is more a "I hope they will" thing.

cro-magnon gramps · « **Reply #25 on:** 01/16/2014 02:10 pm »

I voted splash down intact... or at least try to, very late in the year... with no intent on recovery, as this will be a one off for the year, to get some data... maybe recover some parts, as it is unlikely to actually be intact on first try...

ok in one way I am being conservative, but according to the vote count, I am wildly optimistic

my reasoning is, that with progress on the first stage, they may have an opening for something like what I described above this year... probably NET late Nov/Dec.... but likely to push into 2015...

enough CMA for you guys

Gramps

Mader Levap · « **Reply #26 on:** 01/16/2014 04:15 pm »

Quote from: oiorionsbelt on 01/15/2014 10:21 pm

So do you guys think there will be an attempt?

In 2014? Not even that. In fact, I think second stage recovery&reuse will be relegated to next generation of SpaceX rockets. Or at least F9 v.1.2, but even that is stretch.

rcoppola · « **Reply #27 on:** 01/16/2014 04:28 pm »

I put "Attempt Recovery". i don't think they will do any mods to 2nd stage such as legs or added TPS. But I think they will do some additional RCS test maneuvers, additional engine relights (3). I mean why not? On CRS fights, they have margin to "Play" with and maybe get some additional data on controlled reentry sequences.

mme · « **Reply #28 on:** 01/16/2014 04:44 pm »

Quote from: rcoppola on 01/16/2014 04:28 pm

I put "Attempt Recovery". i don't think they will do any mods to 2nd stage such as legs or added TPS. But I think they will do some additional RCS test maneuvers, additional engine relights (3). I mean why not? On CRS fights, they have margin to "Play" with and maybe get some additional data on controlled reentry sequences.

I selected "none of the above" because I think they already have too much on their plate. I do agree that they may experiment with reentry to collect some data, but I couldn't check the "return/recovery" option because I don't see anyway for a second stage to survive reentry without a heat shield. "Controlled" reentry still results in pieces too small to recover.

I'm not a rocket scientist and I'm a newbie to the forum, so I could be completely full of it.

rcoppola · « **Reply #29 on:** 01/16/2014 05:35 pm »

Quote from: mme on 01/16/2014 04:44 pm

Quote from: rcoppola on 01/16/2014 04:28 pm
I put "Attempt Recovery". i don't think they will do any mods to 2nd stage such as legs or added TPS. But I think they will do some additional RCS test maneuvers, additional engine relights (3). I mean why not? On CRS fights, they have margin to "Play" with and maybe get some additional data on controlled reentry sequences.
I selected "none of the above" because I think they already have too much on their plate. I do agree that they may experiment with reentry to collect some data, but I couldn't check the "return/recovery" option because I don't see anyway for a second stage to survive reentry without a heat shield. "Controlled" reentry still results in pieces too small to recover.

I'm not a rocket scientist and I'm a newbie to the forum, so I could be completely full of it.

A belated welcome.
No, you're on the right track. I guess I would have added some nuance to the first choice where it's not so much Attempt Reentry but more experimentation with certain reentry profiles to gain further data to support future attempts.

Barrie · « **Reply #30 on:** 01/16/2014 08:19 pm »

I voted none. I think they will decide they don't want to sacrifice any more performance for the time being, so they won't pursue it this year. I don't think 'too much on their plate' will be the reason - Musk seems able to delegate

Halidon · « **Reply #31 on:** 01/17/2014 01:19 am »

We've not yet seen even a hint of the reusable second stage hardware, and they have a pretty full plate with GH2, first stage development, Dragon2/DragonRider testing, and FH. Voted none of the above for this year.

subzero788 · « **Reply #32 on:** 01/17/2014 12:12 pm »

Not a chance of any of these...second stage recovery will be a lot harder than first stage recovery, and they will be lucky if they can do that in 2014

Norm38 · « **Reply #33 on:** 01/17/2014 01:59 pm »

I voted None for '14. I doubt they'd do any real second stage work until they land a first stage and release Dragon 2. They have their hands full for this year.

But for '15 there are opportunities to begin testing second stage reentry. (Jason)

MP99 · « **Reply #34 on:** 01/18/2014 08:13 pm »

I voted none.

If they have dV remaining after a LEO mission they may de-orbit a second stage, but without heatshield, so not a "recovery" attempt.

cheers, Martin

sdsds · « **Reply #35 on:** 01/18/2014 10:59 pm »

I voted none, but:

Quote from: sdsds on 01/18/2014 10:57 pm

Quote from: Lar on 01/17/2014 12:43 pm
Groupthink[1] says that 2014 is too early to see much, if any, second stage reuse testing, even preliminary things like trying to reenter an otherwise unmodified second stage and not have it tumble initially (till it melts, since it's unshielded), but maybe 2015?

This seems like good thinking. As for 2014 being too early, I voted that way but ... for Jason 3 and indeed for recovery of any second stage that was tasked with a two-burn mission profile (i.e. GTO) the first step of stage recovery would likely involve a third burn, i.e. a second restart much later in the mission. I could see SpaceX doing early trials of just that step in 2014, even if there wasn't sufficient residual propellant to send the stage immediately into the atmosphere.

ClaytonBirchenough · « **Reply #36 on:** 01/26/2014 02:12 pm »

I selected "none of these". SpaceX will iron out the kinks with first stage recovery/reuse in 2014.

ClaytonBirchenough · « **Reply #37 on:** 04/25/2014 02:33 pm »

? 162 voters voted for "None of these" equaling ~48%. However, 162 / 231 = ~70%. The poll is not calculating correctly...?

Mongo62 · « **Reply #38 on:** 04/25/2014 02:40 pm »

Quote from: ClaytonBirchenough on 04/25/2014 02:33 pm

? 162 voters voted for "None of these" equaling ~48%. However, 162 / 231 = ~70%. The poll is not calculating correctly...?

231 people voted, but they could choose more than one answer. So that 48% represents the percentage of all options chosen, not of all people voting.

ClaytonBirchenough · « **Reply #39 on:** 04/25/2014 03:14 pm »

Quote from: Mongo62 on 04/25/2014 02:40 pm

Quote from: ClaytonBirchenough on 04/25/2014 02:33 pm
? 162 voters voted for "None of these" equaling ~48%. However, 162 / 231 = ~70%. The poll is not calculating correctly...?

231 people voted, but they could choose more than one answer. So that 48% represents the percentage of all options chosen, not of all people voting.

Ah, haha thank you.

Poll

In 2014, a Falcon 9 second stage will... (choose ALL which apply)

Author Topic: POLL: SpaceX Accomplishments - F9 SECOND STAGE (Read 16354 times)