Author Topic: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION  (Read 199621 times)

Offline cppetrie

  • Full Member
  • ****
  • Posts: 792
  • Liked: 552
  • Likes Given: 3
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #320 on: 06/30/2017 07:58 pm »
Looks like they've figured out just what the aluminum fins will put up with. And almost found out if the stage can tolerate losing a fin midflight.
And really demonstrated why they needed to transition to the Titanium ones which still look brand new after flight.

Offline Herb Schaltegger

Looks like they've figured out just what the aluminum fins will put up with. And almost found out if the stage can tolerate losing a fin midflight.
And really demonstrated why they needed to transition to the Titanium ones which still look brand new after flight.

They look brand new after Iridium flights. The proof will be how well they handle a super-synchronous mission profile such as BulgariaSat. I have little doubt they'll hold up a lot better; but I do have doubts they will be infinitely reusable.

Time of course will tell.
Ad astra per aspirin ...

Offline Ben the Space Brit

  • Senior Member
  • *****
  • Posts: 7209
  • A spaceflight fan
  • London, UK
  • Liked: 814
  • Likes Given: 903
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #322 on: 07/01/2017 06:57 am »
Combining the fin damage with the landing gear collapse, I think that we can safety say that a BulgariaSat-1-like super-synchronous mission profile represents the furthest you can push the block-3 core. Whether the titanium-finned block-4s can manage better is a question to be answered but not one I would feel confident telling Mr Musk to try too quickly.
"Oops! I left the silly thing in reverse!" - Duck Dodgers

~*~*~*~

The Space Shuttle Program - 1981-2011

The time for words has passed; The time has come to put up or shut up!
DON'T PROPAGANDISE, FLY!!!

Online FutureSpaceTourist

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 50716
  • UK
    • Plan 28
  • Liked: 85227
  • Likes Given: 38177
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #323 on: 07/01/2017 06:57 am »
Reddit user FellowHumanBean noticed an amendment to the FCC launch license for Bulgariasat:
Quote
SpaceX BulgariaSat liability insurance
I missed this at the time, but on June 16, the FAA modified SpaceX's liability insurance see LLS 17-101 for the BulgariaSat mission to $68MM, while other missions covered by the same license remain at $30MM.

That's a great spot! Not obvious to me why the change. Wasn't SES-10, i.e. first booster re-use, under the original version of this licence? So why the change for BulgariaSat?

Offline su27k

  • Senior Member
  • *****
  • Posts: 6414
  • Liked: 9104
  • Likes Given: 885
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #324 on: 07/01/2017 07:33 am »
Reddit user FellowHumanBean noticed an amendment to the FCC launch license for Bulgariasat:
Quote
SpaceX BulgariaSat liability insurance
I missed this at the time, but on June 16, the FAA modified SpaceX's liability insurance see LLS 17-101 for the BulgariaSat mission to $68MM, while other missions covered by the same license remain at $30MM.

That's a great spot! Not obvious to me why the change. Wasn't SES-10, i.e. first booster re-use, under the original version of this licence? So why the change for BulgariaSat?

I think BulgariaSat skipped McGregor testing? It also had a longer than usual static fire.

Offline macpacheco

  • Full Member
  • ****
  • Posts: 892
  • Vitoria-ES-Brazil
  • Liked: 368
  • Likes Given: 3041
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #325 on: 07/01/2017 06:13 pm »
I think BulgariaSat skipped McGregor testing? It also had a longer than usual static fire.
Refurbishments are being done 100% at the CAPE. The booster never leaves back to McGregor or Hawthorne.
Every information available says the first time the booster engine fires again is at the static fire.

The very first refurb might have been different, but apparently it was the exception.
Looking for companies doing great things for much more than money

Offline IanThePineapple

I think BulgariaSat skipped McGregor testing? It also had a longer than usual static fire.
The very first refurb might have been different, but apparently it was the exception.

Yep, CRS-8 went back to McGregor for a full duration static fire (I don't know if it went all the way to Hawethorne though).

Offline Robotbeat

  • Senior Member
  • *****
  • Posts: 39359
  • Minnesota
  • Liked: 25388
  • Likes Given: 12164
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #327 on: 07/01/2017 06:49 pm »
I think BulgariaSat skipped McGregor testing? It also had a longer than usual static fire.
Refurbishments are being done 100% at the CAPE. The booster never leaves back to McGregor or Hawthorne.
Every information available says the first time the booster engine fires again is at the static fire.

The very first refurb might have been different, but apparently it was the exception.
So the answer is "yes"?
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Offline billh

  • Full Member
  • ****
  • Posts: 797
  • Houston
  • Liked: 1145
  • Likes Given: 830
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #328 on: 07/02/2017 10:38 pm »
After seeing the condition of the grid fins I went back and reviewed the video coverage. If the on-screen telemetry is accurate, when the first stage for BulgariaSat-1 started its entry burn its velocity was 8500 km/h. Even at the end of the burn it was still 6600 km/h. Compare that to CRS-11 (which also did a boostback burn): 4500 km/h at the start of the entry burn and 3500 km/h at the end. That's a whale of a big difference in kinetic energy that has to be dissipated by drag forces. It's really amazing this stage survived at all!

Still eagerly awaiting release of the landing video..

Offline Paul_G

Still eagerly awaiting release of the landing video..

I think SpaceX want to focus on mission success for Intelsat before they show off their own 'wild' stuff. Its noticeable on the last few webcasts that they are giving their launch customers air time, which is nice for us to understand what the primary missions are all about.

Paul

Offline mlow

  • Member
  • Posts: 75
  • Liked: 18
  • Likes Given: 8
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #331 on: 07/04/2017 06:51 pm »
Still eagerly awaiting release of the landing video..

I think SpaceX want to focus on mission success for Intelsat before they show off their own 'wild' stuff. Its noticeable on the last few webcasts that they are giving their launch customers air time, which is nice for us to understand what the primary missions are all about.

Paul

Have we had official release of some of the sporty landings? Thaicom landing for instance was the other sporty landing that comes to mind.

Offline old_sellsword

  • Full Member
  • ****
  • Posts: 632
  • Liked: 531
  • Likes Given: 470
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #332 on: 07/04/2017 07:26 pm »
Still eagerly awaiting release of the landing video..

I think SpaceX want to focus on mission success for Intelsat before they show off their own 'wild' stuff. Its noticeable on the last few webcasts that they are giving their launch customers air time, which is nice for us to understand what the primary missions are all about.

Paul

Have we had official release of some of the sporty landings? Thaicom landing for instance was the other sporty landing that comes to mind.

We sort of got landing footage for Thaicom 8. Not what most here would prefer, but better than nothing.


Offline Bernadov

  • Member
  • Posts: 1
  • Vienna
  • Liked: 1
  • Likes Given: 0
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #333 on: 07/05/2017 05:13 am »
Any news on a landing video of the 1029.2. booster?

Offline cferreir

Not letting this die until we get a video or story from SpaceX. Come on...we learn from our failures! We learn more from being open.........That is what we love from SpaceX!!! Lets see that awesome video!

Not letting this die until we get a video or story from SpaceX. Come on...we learn from our failures! We learn more from being open.........That is what we love from SpaceX!!! Lets see that awesome video!

Don't get your hopes up. Multiple people who claim to know employees who have seen the video have said it is highly unlikely people like you or I will get to see it.

Offline JebK

  • Member
  • Posts: 82
  • United States
  • Liked: 58
  • Likes Given: 15
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #336 on: 08/01/2017 08:38 pm »
If we don't see it (and if they haven't released it yet they're likely not going to) it won't be the first time they haven't released landing video.  Sure they showed initial failures, but they only released video of an attempt if it showed progress from a previous one, if this looks iffy it would look like a step backward even though the landing was successful.  Unfortunately ts all about Corporate PR, not "look how cool this is fellow rocket nerds!".

Offline cscott

  • Senior Member
  • *****
  • Posts: 3473
  • Liked: 2869
  • Likes Given: 726
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #337 on: 08/01/2017 09:24 pm »
We'll probably see each excerpt in Elon's September lecture.  Gwynne also likes to compile summary videos for her talks.

Anyone have any idea what just happened to the R/B from this launch? Did they perform a de-orbit manoever???


1 42802U 17038B   17293.72551647  .00027554  34224-5  23039-2 0  9996
2 42802  24.5026  10.7656 8296019 214.1455  24.5398  1.15434098  1332
1 42802U 17038B   17298.50320531 -.00000191  22902-6  00000+0 0  9993
2 42802  24.2449   8.5033 5926106 217.8158 334.7218  4.30932446  1399
1 42802U 17038B   17298.50320531 -.00000191  22902-6  00000+0 0  9993
2 42802  24.2449   8.5033 5926106 217.8158 334.7218  4.30932446  1399
1 42802U 17038B   17298.50320531 -.00000191  22902-6  00000+0 0  9993
2 42802  24.2449   8.5033 5926106 217.8158 334.7218  4.30932446  1399
1 42802U 17038B   17298.50320531 -.00000191  22902-6  00000+0 0  9993
2 42802  24.2449   8.5033 5926106 217.8158 334.7218  4.30932446  1399
1 42802U 17038B   17299.50658123  .00002909 -18328-4  00000+0 0  9999
2 42802  24.1857   6.6360 2957658 221.3868 298.2410  9.85103635  1432

Offline gwiz

  • Full Member
  • ****
  • Posts: 607
  • Cornwall
  • Liked: 147
  • Likes Given: 30
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #339 on: 10/28/2017 10:51 am »
With its very eccentric orbit and low perigee, it's vulnerable to combinations of lunar/solar gravity perturbations and atmospheric variations that can give a significant aerobraking effect.

Tags:
 

Advertisement NovaTech
Advertisement Northrop Grumman
Advertisement
Advertisement Margaritaville Beach Resort South Padre Island
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
1