Author Topic: SpaceX Falcon 9: To Static Fire or not to Static Fire; that is the question  (Read 65287 times)

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Re: Crew-1 Static Fire:
Quote from: Tweet
NASA's @Astro_illini says the agency is monitoring the weather forecast and that it "potentially is going to have an impact" on the Crew-1 launch date.

"I think we've moved the static fire" from Monday [November 9] to Tuesday [November 10] "because of the weather conditions."  [They did.]
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Re: Crew-1 Static Fire:
Quote from: Tweet
NASA's @Astro_illini says the agency is monitoring the weather forecast and that it "potentially is going to have an impact" on the Crew-1 launch date.

"I think we've moved the static fire" from Monday [November 9] to Tuesday [November 10] "because of the weather conditions."  [They did.]
Successful Static Fire on November 11.
« Last Edit: 11/12/2020 01:32 am by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Open question: Will SpaceX perform a Static Fire on the 1st stage for NROL-108?  What does the "customer" want?
Lack of data: We don't know exactly when the launch is, and we don't know which (used) stage it will be. ;D
NET November 18, CCAFS SLC-40, B1059.5

Cross-post:
NextSpaceflight says the booster will be B1059.5. Meaning B1059 is the first time a booster does three RTLS (also all RTLS's this year were B1059) and first time a external customer uses a fifth flight booster.
https://nextspaceflight.com/launches/details/5112

NET date and location

EDIT: Launch delayed into December.
« Last Edit: 11/20/2020 04:02 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
When will be the Static Fire of B1063.1, Vandenberg AFB, for Sentinel-6A?:
My bold; Static Fire?
From sentinel6.blog
Quote
<snip>
Preparations were underway for the rehearsals of the satellite on on Thursday and the launcher on Friday [November 13].
<snip>
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
When will be the Static Fire of B1063.1, Vandenberg AFB, for Sentinel-6A?:
November 17!
https://twitter.com/SpaceX/status/1328779234945478663
Quote
Static fire test complete – targeting Saturday, November 21 for Falcon 9 launch of the Sentinel-6 Michael Freilich mission and landing at SLC-4 at Vandenberg Air Force Base in California
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Starting here, we have the data for the Starlink v1.0 Flight 15 launch: Date, time, launch location, and LV first stage.

As this will be 1049's seventh use, we assume that there will be a Static Fire.  The payload is Starlink satellites, an "internal" customer, so SpaceX will likely choose to do so with the payloads and fairing atop the LV.  The vehicle may be rolled out and erected at SLC-40, before Static Fire and launch, as late as a day or two before launch.
« Last Edit: 11/20/2020 03:58 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Re: Static Fire, Starlink v1.0 Flight 15:
Quote from: Tweet
Looks like the static fire may have been aborted. We did not see any action at 1:30 a.m. [November 20] Eastern as expected.
***

Static Fire at 4:00 pm EST, November 21.

https://twitter.com/SpaceX/status/1330277683234746368
Quote
Static fire test complete – targeting Falcon 9 launch of Starlink from SLC-40 in Florida on Sunday, November 22.
« Last Edit: 11/22/2020 12:21 am by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Dragon SpX-21 currently scheduled to launch from KSC LC-39A on December 5, on first stage 1058.4.
Static Fire before launch, or no Static Fire?
My opinion:  Expect a Static Fire, as this is a NASA and ISS support payload, but without Dragon attached.
Thus, roll-out for Static Fire, followed by return to the LC-39A HIF for Dragon late load on the pad for Dragon attachment, then a return to the pad for launch.

ADD: Static Fire scheduled for morning Thursday, December 3 EST (local time).

and EDITS
« Last Edit: 12/03/2020 06:00 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
SXM-7 launching to GTO on December 10 from SLC-40, aboard Falcon 9 first stage 1051.7.  This is the second booster to reach a seventh flight.

My opinion:  Rocket will transport to pad for Static Fire, without the payload or payload fairing.
Upon successful completion, rocket returns to HIF for payload attachment.
Return to pad for launch.
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline Joffan

Dragon SpX-21 currently scheduled to launch from KSC LC-39A on December 5, on first stage 1058.4.
Static Fire before launch, or no Static Fire?
My opinion:  Expect a Static Fire, as this is a NASA and ISS support payload, but without Dragon attached.
Thus, roll-out for Static Fire, return to the LC-39A HIF for Dragon late load for Dragon attachment, then a return to the pad for launch.

EDIT: Static Fire scheduled for morning Thursday, December 3 EST (local time).

I believe that late load can be undertaken via the crew access arm, on the pad & vertical.
Getting through max-Q for humanity becoming fully spacefaring

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Dragon SpX-21 currently scheduled to launch from KSC LC-39A on December 5, on first stage 1058.4.
Static Fire before launch, or no Static Fire?
My opinion:  Expect a Static Fire, as this is a NASA and ISS support payload, with Dragon attached.

EDIT: Static Fire scheduled for morning Thursday, December 3 EST (local time).

Cross-post:
https://twitter.com/spacex/status/1334502616374550529

Quote
Static fire test complete — targeting December 5 for Falcon 9 launch of Dragon’s 21st resupply mission to the @space_station; team is keeping an eye on weather conditions as the forecast is currently 40% favorable for liftoff
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
I believe that late load can be undertaken via the crew access arm, on the pad & vertical.
Yes!
https://forum.nasaspaceflight.com/index.php?topic=51769.msg2161700#msg2161700
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Open question: Will SpaceX perform a Static Fire on the 1st stage for NROL-108?  What does the "customer" want?
Cross-post:
NextSpaceflight says the booster will be B1059.5. Meaning B1059 is the first time a booster does three RTLS (also all RTLS's this year were B1059) and first time a external customer uses a fifth flight booster.
https://nextspaceflight.com/launches/details/5112

Launch NET December 17, from KSC LC-39A, still B1059.5.
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
SXM-7 launching to GTO on December 10 from SLC-40, aboard Falcon 9 first stage 1051.7.  This is the second booster to reach a seventh flight.

My opinion:  Rocket will transport to pad for Static Fire, without the payload or payload fairing.
Upon successful completion, rocket returns to HIF for payload attachment.
Return to pad for launch.

Successful Static Fire, December 7 1800 EST.
https://twitter.com/nasaspaceflight/status/1336083637935214595

Quote
Static Fire conducted. As always, wait for SpaceX to confirm a good test and the launch date (NROL-44 also on the Range).

Caught via FleetCam at Port Canaveral.
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Open question: Will SpaceX perform a Static Fire on the 1st stage for NROL-108?  What does the "customer" want?
Cross-post:
NextSpaceflight says the booster will be B1059.5. Meaning B1059 is the first time a booster does three RTLS (also all RTLS's this year were B1059) and first time a external customer uses a fifth flight booster.
https://nextspaceflight.com/launches/details/5112

Launch NET December 17, from KSC LC-39A, still B1059.5.

Cross-post; roll-out circa 24 hours before launch; probably means no Static Fire.
https://twitter.com/emrekelly/status/1339221785057894400

Quote
Falcon 9 / NROL-108 is rolling out to pad 39A in advance of Thursday's planned 0900 to 1200 ET liftoff. Nice photobomb courtesy of a KSC crawler.
« Last Edit: 12/17/2020 03:10 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline Joffan

I'm pretty surprised by no static fire for a NRO launch on a used booster. SpaceX must have made a convincing case with their data.

This suggests to me that future static fires for used boosters might only be for cases when the previous flight data had a few peculiarities, and/or they've changed out some major components.
Getting through max-Q for humanity becoming fully spacefaring

Offline zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 11522
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 7651
  • Likes Given: 74685
Booster 1060.4 for Turksat 5A.  Launch currently scheduled for January 5 UTC, SLC-40.

Will SpaceX perform a Static Fire?
« Last Edit: 12/31/2020 04:31 am by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline Jansen

  • Full Member
  • ****
  • Posts: 1997
  • Liked: 2235
  • Likes Given: 373
I'm pretty surprised by no static fire for a NRO launch on a used booster. SpaceX must have made a convincing case with their data.

This suggests to me that future static fires for used boosters might only be for cases when the previous flight data had a few peculiarities, and/or they've changed out some major components.

This launch was unusual in that it was a commercial launch contract, not under NSSL. NRO wanted this bird up quickly, even opting for LC-39A vs the more secure SLC-40.

Offline rsdavis9

Could it be that for a used booster a static fire REDUCES the success probability.
Being a customer what would you rather have:
1. Loads of performance data from a successful lauch for the full engine runtime.
2. A 2 sec static fire. Possibly the short duration could break something and without the full duration you will miss it.
With ELV best efficiency was the paradigm. The new paradigm is reusable, good enough, and commonality of design.
Same engines. Design once. Same vehicle. Design once. Reusable. Build once.

Offline Jansen

  • Full Member
  • ****
  • Posts: 1997
  • Liked: 2235
  • Likes Given: 373
Could it be that for a used booster a static fire REDUCES the success probability.
Being a customer what would you rather have:
1. Loads of performance data from a successful lauch for the full engine runtime.
2. A 2 sec static fire. Possibly the short duration could break something and without the full duration you will miss it.

If something is going to break in a 2 second static fire, it will certainly fail during a 2 minute launch.

Tags:
 

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