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Ship 20 (SN20 or S20 according to the new naming scheme) is a starship prototype. A first section was spotted on 7 March 2021. More and more parts were assembled and the ship entered its final stacking phase at the end of July 2021. Currently, the fully assembled ship is on suborbital pad B for testing. S20 will be flying on booster B4 for a first orbital attempt.

Elon Musk confirmed on 30 March 2021 that the Starships from SN20 will have significant improvements and orbital capability:

"Next major technology rev is at SN20. Those ships will be orbit-capable with heat shield & stage separation system. Ascent success probability is high. However, SN20+ vehicles will probably need many flight attempts to survive Mach 25 entry heating & land intact."[1]

This would mean that S20 will be the first prototype of the third batch of fully stacked Starships, with the first batch being SN8-11 and the second batch being SN15-16.

History[]

The first part of Ship 20, the leg skirt, was spotted on 07 March 2021, followed by the forward dome a month later. Most parts have been spotted by May and assembly in June/July. On 5 August 2021 the Ship rolled out to the launch site. S20 was stacked on B4 for a fit check on 6 August 2021 befor being removed again on the same day and returned to the Highbay for final construction. Soon, work on the TPS head shield tiles began: they were marked and some had to be replaced, a work that lasted more than a month. On 13 August 2021, S20 moved back to the launch site and was installed on Pad B on 17 August 2021.

Work on the TPS tiles continued for one month since then. On 27 September 2021, Ship 20 underwent a pneumatic (ambient) proof test and was cryo proof tested for a first time. Some TPS tiles were lost during a header tank went. A more rigorous cryo proof test was conducted on 29 September 2021. After that, Rvac5 (a vacuum Raptor engine with reduced bell size for sea level testing) and a SL Raptor have been installed for the Preburner test (Rvac5) on 18 October 2021 and the two static fires on 21 October 2021.

Outdated Information[]

According to FCC documents, an orbital flight of SN20 with a booster was planned no earlier than June 20th. And according to NSF author Chris Bergin, who cites undisclosed sources, SpaceX's goal was to use SN20 and BN3 for a first orbital flight by July 1.[2] This date was postponed to NET August as the progress of preparation work at the orbital launch site with tank farm, integration tower and launch tower suggests.

SN20 is currently thought to become the first orbital Starship, together with B4, with a launch that could happen NET August. As of the beginning of June, stacking hasn't began yet.

Timeline[]

  • 07 March 2021: Leg skirt spotted
  • 07 Apr 2021: Fwd dome spotted
  • 11 Apr 2021: Leg skirt spotted (again)
  • 15 Apr 2021: Fwd dome spotted (again)
  • 15 Apr 2021: Comn dome barrel? section spotted (3-ring)
  • 27 Apr 2021: Aft dome being constructed
  • 07 May 2021: Mid LOX section (4-ring stack) spotted
  • 16 May 2021: MID-LOX and Leg skirt spotted (again)
  • 17 May 2021: SN20 fwd dome outside tents (not stacked yet)
  • 19 May 2021: Nosecones in tent 3 [SN17?, SN20?]
  • 21 May 2021: Marcus House: Combinations SN20-BN3, SN21-BN4, SN22-BN5, SN23-BN6, then major upgrades for SN24-BN7
  • 21 May 2021: GSE aft section (3-ring) with reinforcement and lead ins next to SN20 cmn dome [GSE5?]
  • 21 May 2021: Common dome spotted (3-ring), covered in TPS tile attachment pegs, with lead ins, CH4 header visible
  • 23 May 2021: Aft dome near high bay
  • 23 May 2021: New Starship [5-?] ring section with a lot of TPS tiles in a new arrangement and lead-ins moved out of mid bay [SN20?]
  • 24 May 2021: Common dome with CH4 header tank still outside tents
  • 27 May 2021: Starship 3-ring common dome full with TPS mounting pins [SN20?]
  • 27 May 2021: Starship 3-ring common dome full with TPS mounting pins [SN20?]
  • 29 May 2021: Starship fwd dome (stacked and flipped) hooked to crane [SN20??]
  • 04 June 2021: [SN20?] nosecone and barrel section still outside tent three
  • 05 June 2021: "aft" dome spotted
  • 11 June 2021: Thrust/aft dome sleeved (with 3-ring stack)
  • 16 June 2021: Aft dome moved around
  • 19 June 2021: Aft section in tent 1 [vid20]
  • 24 June 2021: SN20/S20 aft dome in tent
  • 03 July 2021: Common dome (3-ring stack) with lead-ins and TPS-tile cover spotted (passive pressure relief valve on it); hooked to crane and lifted into mid bay for stacking it onto Mid-LOX section (header tank visible)
  • 04 July 2021: Mid LOX section with tiles spotted on July 2 during lift into mid bay [Maria Pointer]
  • 06 July 2021: Single ring section stacked onto 2-ring section infront of tents [SN20/S21 aft section used on June 30??]
  • 07 July 2021: GSE3 (fully stacked) and SN20 (two sections) now in mid bay
  • 12 July 2021: Ring section likely for TPS tiles testing spotted [NSF: possibly for SN20/S20]
  • 12 July 2021: Booster section attached to flipping jig inside high bay [B4?]; later flipped [vid 13] [why booster; could it be SN20?]
  • 13 July 2021: Leg skirt with lead-ins (fewer than with old sections)(2-ring stack) moved; covered TPS tiles attachment pins; lifted onto a mount
  • 13 July 2021: Thrust section outside tent 1 (3-ring stack, with access hole)
  • 13 July 2021: Thrust section stacked onto leg skirt
  • 14 July 2021: 07.2021 Aft flap delivered [SN20?]
  • 14 July 2021: Nosecone spotted: new forward flap mounting jig design; lots of TPS pin attachments; four port RCS thruster (vs 3 on previous SNs); superman logo near top of flap mounting jig
  • 14 July 2021: Work in mid bay continued
  • 16 July 2021: S20? aft flap with TPS tiles spotted; the first time with curved tiles like this [!]
  • 22 July 2021: Thrust section (5-ring section) moved into mid bay, connection point for GSE fuelling arm visible for the first time
  • 23 July 2021: S20? nosecone with TPS mount points in tent 3
  • 23 July 2021: SN20/S20 under construction in mid bay (at least 16 rings tall)
  • 23 July 2021: Tank section now fully stacked
  • 25 July 2021: Work in mid bay continued with several man lifts up
  • 25 July 2021: Nosecone barrel section prepared for TPS tiles, with lead ins, possibly for SN20/S20
  • 26 July 2021: Nosecone barrel section with TPS base layer (for SN20/S20?) lifted into windbreak
  • 27 July 2021: WAI internal SpaceX info: B4/S20 [SN20] ready on OLM by August 5th as internal goal!
  • 29 July 2021: Nosecone with blankets and TPS tiles rolled outside tent (likely for SN20/S20)
  • 29 July 2021: Aft flap installation rig moved inside mid bay and affixed to the ship for flap installation
  • 29 July 2021: Fwd flap delivered to build site (SN20?)
  • 30 July 2021: Nosecone: TPS tiles being installed; aft flaps moved near tents
  • 30 July 2021: Ship aerocover unloaded (SN20?)
  • 31 July 2021: Nosecone stacked onto barrel section at wind break; quadratic TPS heat shield tiles spotted near the flap attachment rig; lead-ins removed after the two parts have been welded together
  • 31 July 2021: Tank section work in mid bay continued
  • 31 July 2021: First aft flap installed in mid bay
  • 01 Aug 2021: First forward flap attached to nosecone; smaller sice visible; work on the TPS tiles installation continued
  • 02 Aug 2021: Nosecone: TPS tiles installation continued
  • 02 Aug 2021: Rolled out of mid bay, nearly fully covered with TPS tiles on one site (still some needed near the section welds)
  • 02 Aug 2021: Aft flap installed (with TPS tiles)
  • 02 Aug 2021: Second fwd flap installed, second aft flap installed
  • 03 Aug 2021: Work continued outside high bay
  • 03 Aug 2021: Moved into high bay ahead of nosceone stacking
  • 03 Aug 2021: RV5 and another RVac engine moved towards Starship SN20/S20 for a fit check. They were installed that day.
  • 03 Aug 2021: Nosecone moved and stopped just outside lowbay, more TPS tiles added; later moved to high bay for stacking as well
  • 03 Aug 2021: All six Raptor engines (3SL, 3Rvac) have been installed [Musk]
  • 04 Aug 2021: Nosecone lifted into high bay; stacked at 4:11 am
  • 04 Aug 2021: Unhooked from bridge crane, now fully assembled!
  • 05 Aug 2021: SN20/S20 and GSE6 [NSF]/GSE3 [LP] rolled out to OLS [apparently it was GSE3, vid 07]
  • 05 Aug 2021: Attached to LR11350
  • 05 Aug 2021: Lift scrubbed due to high winds
  • 06 Aug 2021: More TPS tiles installed
  • 06 Aug 2021: Stacked onto B4 by LR11350, fully assembled rocket for the first time ever!!
  • 06 Aug 2021: Removed from B4 by LR11350 after first fit check for final construction, touch-down at 9:45 am
  • 06 Aug 2021: Moved back to build site; into high bay; hooked to bridge crane
  • 07 Aug 2021: Rvac engines removed and moved around
  • 07 Aug 2021: Sea level raptor engines removed
  • 08 Aug 2021: Colored labels attached to TPS tiles, likely to indicate damage that needs repairs
  • 09 Aug 2021: More TPS tiles marked
  • 10 Aug 2021: More colored labels attached to TPS tiles
  • 11 Aug 2021: Moved out of the high bay to prepare it for B4; positioned outside mid bay
  • 11 Aug 2021: Work on TPS tiles continued (labels)
  • 12 Aug 2021: TPS tiles inspection/repair work continued; blue markings "E1", "E2" seen
  • 12 Aug 2021: TPS tile replacement began
  • 13 Aug 2021: Prepared for roll out
  • 13 Aug 2021: A lot of TPS tiles removed from nosecone barrel section
  • 13 Aug 2021: SN20/S20 moved back to launch site; arrived at 11:57am
  • 15 Aug 2021: TPS tiles work continued; also some work on external wiring
  • 15 Aug 2021: Work continued during the night [vid 16]
  • 16 Aug 2021: Work on raceway (electrical wiring) continued
  • 17 Aug 2021: Prepared for move to SoLS pad B for testing (ambient and cryo proof/pressure testings expected); work through access hole
  • 17 Aug 2021: Moved towards pad B; lifted onto the pad by LR11000 (6:13pm)
  • 18 Aug 2021: At least two Rvac engines that were installed on SN20/S20 left Boca Chica
  • 18 Aug 2021: Still hooked to LR11000
  • 19 Aug 2021: Still attached to LR11000, still a lot of green and red labels on TPS tiles
  • 19 Aug 2021: Disconnected from LR11000 at 3.08 pm
  • 22 Aug 2021: SN20/S20 still with a lot of labels on TPS tiles
  • 23 Aug 2021: TPS tiles work continued
  • 25 Aug 2021: TPS tiles work continued, still a lot of red labels; new red labels added near aft flap
  • 26 Aug 2021: Work continued
  • 27 Aug 2021: Work continued
  • 28 Aug 2021: Work on TPS tiles continued
  • 29 Aug 2021: Work continued
  • 31 Aug 2021: Still awaiting testing on Pad A; work on TPS tiles continued
  • 02 Sep 2021: SN20/S20 prepared for upcoming cryo tests
  • 02 Sep 2021: TPS tiles work continued
  • 03 Sep 2021: Work continued
  • 04 Sep 2021: Work on aft section (manlifts going up under skirt) continued as well as on TPS tiles; more work through the access port
  • 05 Sep 2021: Work under skirt ahead of Raptor installation
  • 05 Sep 2021: TPS tiles replacement continued
  • 06 Sep 2021: Raptor engines being installed (RSL); work on TPS tiles continued, now blue and turquoise markings appeared
  • 06 Sep 2021: Work near/through access hatch
  • 06 Sep 2021: Work on Raptor engine at launch site ahead of installation on SN20/S20
  • 07 Sep 2021: Work on TPS tiles continued; coloured labels slowly getting less
  • 08 Sep 2021: Work continued in several areas
  • 08 Sep 2021: Damaged TPS tiles replacement continued, most marked tiles have been replaced or repaired; work in the engine bay
  • 10 Sep 2021: Rvac engine arrived at launch site at 1:36 am; fitted on SN20/S20 at 4:22 am
  • 11 Sep 2021: Work on TPS tiles seems quite complete by now, a few missing on the top of the nosecone, especially around the crane attachment points
  • 12 Sep 2021: TPS tiles work continued; hatch was closed
  • 14 Sep 2021: Hatch opened for work; TPS tiles looking nearly fully repaired
  • 15 Sep 2021: Work continued; manlifts up at access hatch; TPS work continued as well, some markings and missing tiles in the aft area; Raptor engine installation
  • 16 Sep 2021: Work inside the aft section
  • 17 Sep 2021: Work continued (access hatch open, work inside)
  • 19 Sep 2021: Work under aft section
  • 23 Sep 2021: Cryo pipes installed to test stand [?]
  • 24 Sep 2021: RVac puck shucking equipment for SN20/S20 returned to launch site, installed under Ship on test stand B, with center engine thrust pucker
  • 26 Sep 2021: Worked on
  • 27 Sep 2021: Prepared for testing; thrust simulator has been installed earlier; work around the quick disconnect fitting
  • 27 Sep 2021: Pneumatic (ambient) proof test (some TPS tiles lost) and cryo proof test
  • 28 Sep 2021: Testing scrubbed
  • 29 Sep 2021: Work continued ahead of testing
  • 29 Sep 2021: SN20/S20 cryo proof test
  • 01 Oct 2021: Venting
  • 01 Oct 2021: Thrust ram removed from engine section/pad B
  • 03 Oct 2021: Work in aft section
  • 03 Oct 2021: Aft flaps opened during flap test [vid 04]
  • 11 Oct 2021: Rvac5 engine installed on SN20/S20
  • 12 Oct 2021: Work continued on aft section, Rvac5 installation completed
  • 13 Oct 2021: Overpressure notice for today's SN20/S20 static fire attempt issued
  • 13 Oct 2021: Work in the aft skirt area ahead of potential static fire
  • 13 Oct 2021: RC for today cancelled, SN20/S20 static fire NET Thursday
  • 13 Oct 2021: NOTMAR posted for October 14 for potential SN20/S20 static fire; Alert notice issued
  • 14 Oct 2021: Work inside aft skirt continued
  • 14 Oct 2021: Scrubbed static fire attempt
  • 15 Oct 2021: Work under aft skirt continued, as well as through top hatch

Gallery[]

Construction[]

Rollout for assigned booster

B4 being rolled out to OLS by two SPMTs; launch site visible in the background; S20 in front of mid bay

Read more >

All 6 raptor engines installed on S20 in high bay; 3 gimbling Sea Level engines and 3 Rvac engines

Read more >

B4 rollout with S20 in the background.

Stacking

S20 attached to LR11350 ahead of stacking it onto B4

Read more >

S20 and B4 ahead of stacking for fit check

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S20 lifted by LR11350 crane for stacking it onto B4 for a short fit check

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S20 being lifted onto B4 by LR11350 crane

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Ship 20 attached to a crane for stacking.

Stacking on B4[]

S20 being stacked onto B4

Read more >

S20 and B4 during fit check

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Ship 20 being stacked on top of B4.

First full stack on OLM[]

S20 stacked on B4 for short fit check befor removing it again

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S20 being stacked onto B4 for a first, short fit check at the orbital launch site

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S20 stacked onto B4 by LR11350 crane for a short fit check

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S20 stacked onto B4 for a short fit check

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                                                                                                               Fly me to the moon                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  ( fully stacked orbital Starship)

FCC[]

13 May 2021[]

On May 13, 2021, the FCC released information about "Starship Orbital First Flight", describing the plans for the first orbital flight. This flight is planned NET June 20th (No earlier than), the requested period of operation is June 20 to December 20 of 2021.

Flight profile:

  • Start from Boca Chica, TX
  • Booster stage separation approximately 170 seconds into flight
  • Booster performing a partial return and "land" in the Gulf of Mexico, approx. 20 miles from the shore
  • Starship to continue flying between Florida Straits and achieve orbit
  • Targeted landing of Starship (upper stage) approx. 100km off the northwest coast of Kauai (Hawaii), soft ocean landing [as known with early Falcon testing], thus some 3/4 around the earth

Detailed flight profile:

  • +00s Liftoff
  • +169s MECO
  • +171s Stage separation
  • +176s SES
  • +495s Booster touchdown
  • +521s SECO
  • +5420s Ship splashdown (90m, 20s)

More info:

  • Booster apogee: 380160 feet, 115.9 km
  • "We need to make sure ship won't break up on reentry, hence deorbit over Pacific" (Elon Musk[3])

FAA[]

On May 14, the FAA added a FAQ page for the ongoing environmental review of the SpaceX Starship/Super Heavy project in Boca Chica, Texas. "SpaceX must meet all licensing requirements before Starship/Super Heavy can launch." (Chris B[4]) [FAQ: [1]]

Design Changes[]

  • First prototype with full TPS tile cover
  • Rvac mounts
  • QD system [?]
  • Black LOX tank hatch with different material
  • Covered up FTS
  • Lines more tidy

27 September 2021 - Pneumatic (ambient) test; Cryo Proof Testing[]

Testing timeline according to different streams (LabPadre and NSF):

  • 14:45 or earlier: Road closed
  • 15:00 Tankers at OLS tank farm; bigger of the two small vertical tanks venting (the one with the speakers); hatch closing at S20
  • 15:40 Man lift down
  • 15:40 Some venting started at the SoLS tank farm
  • 15:43 Man lift up again
  • 15:59 Second tanker truck left
  • 16:03 Man lift down
  • 16:52:29 (Nerdle cam): TPS tiles above left fwd flap (looking towards east) blew away, due to LOX header tank vent[5]
  • 16:54 S20 dent disappeared
  • 17:52 Six additional cars arrived at pad
  • 18:56 Pad cleared
  • 19:41, 19:43 Ship LOX? venting
  • 19:46 More small vents (small CH4?)
  • 20:08 Venting from stand lines/around skirt began
  • 20:15 Lots of venting around the skirt/thrust pucker; condensation on LOX tank
  • 20:25 Fast venting frum thrust pucker area
  • 20:35 Venting slowed down
  • 20:40 Venting nearly fully stopped; LOX depress vent; some CH4 venting
  • 20:45 Short LOX vent
  • 20:49 Tank farm venting
  • 20:56 Satellite dish lifted
  • 21:16 Road opened; huge vent audible
  • SoLS tank farm venting continued for a long time

28 September 2021 - Scrubbed Testing[]

Testing timeline according to LabPadre and NSF streams:

  • 15:42 Sheriff at road block
  • 17:30 Soft road closure (barrier)
  • 17:54 Road closed
  • 18:44 Road opened

29 September 2021 - Cryo proof test[]

According to Elon Musk, the "Proof was good!"[6]

Testing timeline according to LabPadre and NSF streams:

  • 14:58 Soft closure
  • 15:44 Road closed
  • 17:05 Man lift with workers for hatch closing down
  • 17:25 Dog spotted
  • 17:41 Lightning alert at pad
  • 17:46 Pad cleared
  • 17:58 Satellite dish down
  • 18:00 Several ventings
  • 18:10, 18:14 LOX/CH4 venting
  • 18:15 Storm rolled in with heavy rain and lightning
  • 19:21 Announcement: Lightning now passed, it is safe to return
  • 19:37 Venting again
  • 19:38 Skirt venting began (around QD)
  • 19:45 Condensation at LOX tank
  • 19:50 LOX vent short; CH4 vent; skirt vent decreased
  • 20:00 LOX frost beginning to form [is it higher?]
  • 20:13 Vent from stand/thrust pucker increased four a short period
  • 20:15 Condensation at CH4 tank
  • 20:30 Lot condensation on LOX tank, several short vents from CH4 tank
  • 20:35 CH4 tank vents continued
  • 20:36 LOX frost increasing; CH4 frost beginning to appear (right at the hight of TPS)
  • 20:43 CH4 tank vents continued; loud vent later
  • 20:50 LOX tank some top frost "Santaclause"
  • 21:00 Frost decreased
  • 21:08 New vent from the side (right to the FTS) spotted
  • 21:12 Unusual vent/condensation from bottom hatch area
  • 21:20 LOX tank nearly fully frosty now
  • 21:53 Several huge LOX vents; CH4 vents
  • 21:54 SoLS tank farm activity started
  • 21:55 Side LOX vent
  • 22:03 More frost on CH4 tank; drone?; no more vent from hatch
  • 22:10 Frost falling off from LOX tank
  • 22:43 Satellite dish moving northwards
  • 23:00 CH4 tank frost increased slightly
  • 23:07 Huge LOX and CH4 vents
  • 23:38 Big depress vents from LOX and CH4 tanks; frost decreasing
  • 00:44 Road opened

14 October 2021 - Scrubbed Static Fire Attempt[]

Testing timeline according to LabPadre and NSF streams:

  • 16:16 Sheriff arrived
  • 16:18 Road closed
  • 19:20 Pad cleared
  • 20:57 Road opened

18 October 2021 - Preburner Test[]

Testing timeline according to LabPadre and NSF streams (the indicated times in the stream timelines are found to be a few minutes off):

  • 17:00 Road closed
  • 20:30? Ground or some continuous SoLS tank farm venting
  • 21:41 Pad clear
  • 21:49 Drone spotted going up
  • 21:58 Drone spotted coming down
  • 22:26 Drone spotted again
  • 22:27 Recondenser puffs began
  • 22:53 Drone spotted again
  • 22:58 More venting from recondenser, ground venting around S20
  • 23:01 Farm venting spooling up
  • 23:13 Recondenser, fuel loading
  • 23:18 Clear venting from SN20 under skirt, single tri-vent?, but not very constant
  • 23:30 Siren
  • 23:39:02 Preburner test of Rvac5, some small fires left over
  • 23:42 Huge vent heard
  • 00:13 Depress vent
  • 00:27 Road opened

21 October 2021 - Static Fire #1 and #2[]

Testing timeline according to LabPadre[7] and NSF[8] streams:

  • 16:51 Sheriff at road block
  • 17:37 Pad cleared [nerdle cam]
  • 17:51 or earlier [on sentinel cam]: Road closed
  • 18:31 Recondenser
  • 18:36 Tank farm venting (CH4?)
  • 18:37 Ground vent
  • 18:47:57 Puffs from S20 skirt - propellant load began
  • 18:48 Tank farm venting increased a lot
  • 18:49 QD vent
  • 18:56 Skirt vent increased, some venting from the ground around the pad
  • 19:00:50 Engine chill (single)
  • 19:05 Dog spotted at road block
  • 19:06 Siren
  • 16:15:45 Water deluge!!!
  • 19:16:15 Rvac5 static fire (clearly on south side of S20 on rover cam), without spurt; no visible condensation, much plume ahead of fire; some things fell of from middle of hull (possibly TPS?, rover cam)
  • 19:16 Engine chill continued, no huge depress
  • 19:23 Huge skirt venting
  • 19:48:28 Second static fire aborted, planned for both engines (plumes visible for Rvac first, followed by SL 0.5 secs later); followed by fast venting from skirt vent
  • 19:56 Skirt venting/chill began to increase again
  • 20:18:24 Second static fire, Rvac5 and SL Raptor (some fire until 18:40, again something falling off)
  • 20:21 Depress vent, vents from skirt; continuous small venting
  • 20:29 Condensation beginning to form on LOX tank
  • 21:23 Road opened

A video of the first static fire of Rvac5 can be found on SpaceX's twitter: https://twitter.com/i/status/1451350259729420288.

12 November 2021 - Preburner Test and Static Fire #3[]

Since the last static fire, the four missing engines have been installed. All six engines have been fired during this test for the first time ever.

Static Fire of Ship 20 with all six Raptor engines (3 RC and 3 RVac)

Static Fire of Ship 20 with all six Raptor engines (3 RC and 3 RVac)

Timeline according to LabPadre and NSF streams:

  • 06:23 Sheriff at road block
  • 08:00 Announcement "Pad clear in 30 minutes"
  • 08:11 Road closed
  • 08:45 Pad clear (no more care seen later)
  • 08:47 LOX? tank venting; as well as OLS tank farm GSE1/S5 (LN2)
  • 08:51 Ground vent (only short) (LOX overpressure vent)
  • 08:54 More venting around LOX tank
  • 09:15 Grass venting again for short
  • 09:50 B2.1 and GSE4 on the move
  • 10:04 Recondenser
  • 10:07 Tank farm activity (LOX tank)
  • 10:09 Lot ground vent
  • 10:21:30 Skirt puffs (condensation) - prop load
  • 10:38 "Prop load" according to LP timeline
  • 10:42 Condensation on LOX tank starting to form
  • 10:49 Short CH4 vent
  • 11:02:13 (:30 on Rover) Engine chill (Bi-Vent)
  • 11:07 Siren
  • 11:15 Constant puffs
  • 11:18 1.5 rings now frosty frost
  • 11:20:59 (Nerdle, NSF; 21:12 on Rover) Preburner test with huge fireball
  • 11:22:52 Bi-vent increased again, no depress yet
  • 11:30 Bi vent pulsing again
  • 11:41:15 (21 on rover) Possibly aborted static fire/preburner attempt (at least 4 plumes seen)
  • 11:43 Whole LOX tank now with condensation (still 1.5 rings frost)
  • 12:03 Vent from upper right aft flap
  • 12:06 Siren
  • 12:07 LOX tank now full frost
  • 12:13:31/32 (Rover) Deluge system
  • 12:13:41 (54 on Rover) 6 engine Static Fire, some tiles lost (at least 9)
  • 12:16 Recondenser started again
  • 12:17:57 Depress vent; LOX frost beginning to disappear
  • 12:24 Vent stack venting
  • 12:30 Atlas dog spotted
  • 13:24 Road opened for roll out GSE4 and B2.1
  • 13:48 Road opened

Elon Musk wrote, responding to Chris Bergin - NSF: "Good static fire with all six engines!"[9]. Thus he confirmed the full 6 engine static fire.

  • 45-50 mins Recondenser; constant white cloud from right side of the three black tanks

1 December 2021 - Scrubbed Static Fire; Nosecone Vent; B2.1 Test[]

A quite new fuelling procedure was observable with very early "tri"/bi-vent and a new, upwards facing, vent near the lower access hole. After detank, SpaceX startet testing the B2.1 test tank on the booster test stand, followed by something that could have been a nosecone header tank test on the Ship. It was the first time, both tank farms were simultanously active for a testing purpose.

Timeline according to LabPadre (LabCam time ahead of time) and NSF livestreams:

  • Before 09:32 Sherrif at road block, one dish down
  • 10:26 Pad clear?
  • 10:39 Short vent, some venting from SoLS tank farm LOX tank
  • 10:49 Short LOX vent again; continued to vent sporadically
  • 11:33 Ground vent
  • 11:34 Long CH4 tank vent on S20 (2-3 minutes)
  • 10:37 Ground vent; continued in short intervals
  • 11:39 Again some S20 venting in shorter intervals
  • 11:50 Recondenser
  • 11:52 Tank farm activity
  • 11:53 Ground vent
  • 12:03 Aft flap vents (two, look like small tri-vent)
  • 12:12? Skirt vent
  • 12:24 Huge bi-vent by now
  • 12:26 Frost/condensation appearing on lower LOX tank
  • 12:30 Much vent
  • 12:47 Venting noise
  • 12;51 Frost above hatch
  • 12:51:49 Pulsing started
  • 12:55 Vapor dump at skirt
  • 12:56 Siren announced
  • 13:00 Frost at least 1.5 rings on LOX tank
  • 13:02:50 unusual upwards facing vent (near the right bi-vent)
  • 13:18:50 Abort: LOX 18:55 and CH4 19:04 depress vents until 19:27
  • 13:24 Full condensation (typical for detank); Tank farm activity looking like spooling down (CH4 vent, flair stack vent!)
  • 13:42 Methane flair stack vent again; detanking
  • 13:47 One sheriff car left
  • 14:01 Sheriff car returned, the other one left
  • 14:36 Frost nearly fully disappeared
  • 14:59 Frost fully disappeared; Long double depress vent (3 minutes); followed by some more tests
  • 15:17 B2.1 "can crusher" slowly getting frosty; top venting started soon after
  • 15:25 Venting from ground around B2.1 started
  • 15:29 OLS tank farm activity spotted (likely active earlier) at the 2 CH4 heat exchangers/horizontal CH4 tanks [but no CH4 at the farm yet]
  • 15:34 Tank farm activity increased
  • 15:39 Second dish went down
  • 15:44 S20 aft flap vent began again (bi-vent)
  • 15:48 Nosecone header tank vent spotted
  • 15:49:40 Header tank vent spooled up a lot
  • 15:52:23 Double depress vent (short); nosecone vents stopped
  • 16:27 Double depress vent on S20 (about two minutes); CH4 and LOX tanks continued
  • 16:35 First dish vent up
  • 16:38 Depress vent continued
  • 16:41:12 B2.1 Top vent closed; commentator spotted debris falling off the bottom, indicating thrust pucking test
  • 16:43 S20 Depress vents
  • 16:55 More depress vents
  • 17:21 Frost on B2.1 slowly beginning to disappear; OLS tank farm "ground vent" (south of south berm) spotted (LOX or LN2 overpressurization vent)

References[]

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