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  [Discuss] SpaceX Starship and Super Heavy (Page 15)

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Author Topic:   [Discuss] SpaceX Starship and Super Heavy
Blackarrow
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From: Belfast, United Kingdom
Registered: Feb 2002

posted 01-04-2025 05:08 PM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
I vaguely recall hearing Elon Musk saying (several years ago) that he would want to see 100 launches before putting a crew on board. I assume he was talking about Starship. One obvious concern is the apparent lack of any escape route. If Artemis 2 fails during launch, there is a launch escape system to blast the Orion capsule to safety. With Starship (as currently configured) they just have to avoid a launch failure if there's a crew on board. It's like an airliner: no escape rockets under each seat, and no parachutes for passengers, because airlines don't expect airliners to crash very often.

Robert Pearlman
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posted 01-08-2025 12:39 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
As I understand it, like Dragon, the escape system is the Starship spacecraft. If something were to go wrong with Super Heavy, then Starship has the ability to fire its engines and pull away from its booster and fly back to a soft water landing.

Unlike Dragon, Starship does not have parachutes, but Starship is designed to SpaceX's risk tolerances, not NASA or some other safety panel or agency.

Robert Pearlman
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posted 01-08-2025 12:45 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
SpaceX is now targeting Monday (Jan. 13) for the launch of Flight 7, pending the weather conditions. The launch window opens at 4:00 p.m. CDT (2200 GMT).

A live webcast of the flight test will begin about 35 minutes before the liftoff.

Blackarrow
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From: Belfast, United Kingdom
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posted 01-09-2025 12:37 PM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Robert Pearlman:
...If something were to go wrong with Super Heavy, then Starship has the ability to fire its engines and pull away from its booster and fly back to a soft water landing...

That didn't work on the first flight, although I realise there was no hot-staging capability. As for a "soft water-landing" we have seen the explosive results of hot engines meeting cold water.

Robert Pearlman
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From: Houston, TX
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posted 01-09-2025 01:01 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
These videos show Starship making a soft landing in the Indian Ocean (albeit they cut off before seeing them tip over): 1 and 2.

Blackarrow
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From: Belfast, United Kingdom
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posted 01-09-2025 05:15 PM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
We certainly saw (and I recorded) a big explosion just after the Flight 5 Starship "landed" in the Indian Ocean, and I'm pretty sure the same thing happened on Flight 6 after the TV feed was cut, in the same way that the Flight 6 booster blew up after touching down in the Gulf (seen on the live feed I was watching, but not on the feed supplied by SpaceX). It's almost as if they wanted to hide the explosions, which is stupid.

The pinpoint touchdowns were amazing achievements and in no way reduced by the explosions caused by hot engines meeting cold water. And that was my point: it's no help to future passengers in an aborted Starship mission if the Starship splashes down precisely, but then explodes, cracks open and sinks.

Robert Pearlman
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posted 01-09-2025 05:30 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
We we need to wait and see if SpaceX figures out how to bring the vehicle horizontal and negate the risks of explosion. Maybe they can install upright balloons, which keeps the vehicle bobbing vertically in the water.

The vehicle we have seen fly up to now has been Starship 1.0. Version 2 debuts with Flight 7. With each revision comes improvements, including (it would seem) setting up Starship to survive a water landing or have enough fuel reserves to fly back to land.

oly
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posted 01-09-2025 06:42 PM     Click Here to See the Profile for oly   Click Here to Email oly     Edit/Delete Message   Reply w/Quote
SpaceX is still learning how to make the thing fly, perform stage separation, fly back the first stage, get the second stage into orbit, and survive re-entry and landing, all in a condition suitable for rapid and reliable reuse.

There is no point in developing launch abort capability for a crewed design that may change several times before a suitable design is locked because they may just be doing more work for themselves than need be. The next Starship launch will see a lot of design changes from the previous iteration that will need to be evaluated. I don’t think that they have flown two of the same design yet.

The requirements of a crew system are well known, there are numerous standards that the FAA and any other interested parties will require to be built into the system as the design develops.

For the moon landing system SpaceX wants to develop, no launch from Earth escape system needs to be developed because it won't be launching crew. For a lunar launch, a design with a slightly better crew escape system than the Apollo design, i.e. none, should suffice, however, NASA and other interested parties will probably want some type of system unless they can sell a loss of crew during the lunar launch as an acceptable risk.

How far apart SpaceX is between the next Starship launch and the first crewed launch is probably further than most of us imagine it to be.

Robert Pearlman
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From: Houston, TX
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posted 01-10-2025 05:32 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Flight 7 Starship and Super Heavy stacked on the launch pad at Starbase:

Robert Pearlman
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posted 01-11-2025 09:59 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
SpaceX is now targeting Wednesday (Jan. 15) for Flight 7. The launch window still opens at 4:00 p.m. CST (2200 GMT).

Robert Pearlman
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posted 01-15-2025 12:27 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Due to weather, SpaceX is now targeting Thursday (Jan. 16) for Flight 7. The 60-minute launch window opens at 4 p.m. CST (2200 GMT).

Robert Pearlman
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posted 01-16-2025 04:00 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
SpaceX video

Robert Pearlman
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From: Houston, TX
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posted 01-16-2025 04:19 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Flight 7's Super Heavy is launching for the first time with "flight proven" hardware — one of its engines was on Flight 5, which was caught in-flight back on the pad.

The engine number is 314, hence the slice of pi(e).

Robert Pearlman
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posted 01-16-2025 04:50 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Successful booster catch (!) but SpaceX has lost communication with Starship...

Robert Pearlman
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From: Houston, TX
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posted 01-16-2025 05:04 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
At this point, we are assuming that the ship has been lost.
Videos are now being posted to X of Starship exploding and its debris falling over Turks and Caicos. See: 1 | 2 | 3

issman1
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posted 01-16-2025 05:55 PM     Click Here to See the Profile for issman1     Edit/Delete Message   Reply w/Quote
Not good. Is a Starship lunar lander more or less likely?

Robert Pearlman
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From: Houston, TX
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posted 01-16-2025 06:22 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
This is a test program and losses are to be expected.

SpaceX was flying its first second-generation Starship. They will learn what went wrong, correct for it and fly again (pending a likely FAA investigation because the falling debris interrupted air traffic in the area).

Robert Pearlman
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From: Houston, TX
Registered: Nov 1999

posted 01-16-2025 08:54 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
From Elon Musk, SpaceX CEO:
Preliminary indication is that we had an oxygen/fuel leak in the cavity above the ship engine firewall that was large enough to build pressure in excess of the vent capacity.

Apart from obviously double-checking for leaks, we will add fire suppression to that volume and probably increase vent area. Nothing so far suggests pushing next launch past next month.

Robert Pearlman
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From: Houston, TX
Registered: Nov 1999

posted 01-17-2025 07:43 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
From SpaceX:
Starship flew within its designated launch corridor – as all U.S. launches do to safeguard the public both on the ground, on water and in the air. Any surviving pieces of debris would have fallen into the designated hazard area.

If you believe you have identified a piece of debris, please do not attempt to handle or retrieve the debris directly. Instead, please contact your local authorities or the SpaceX Debris Hotline at 1-866-623-0234 or at recovery@spacex.com.

FAA (Federal Aviation Administration) release
FAA Statement on SpaceX Starship Flight 7 Mishap

The FAA is requiring SpaceX to perform a mishap investigation into the loss of the Starship vehicle during launch operations on Jan. 16. There are no reports of public injury, and the FAA is working with SpaceX and appropriate authorities to confirm reports of public property damage on Turks and Caicos.

During the event, the FAA activated a Debris Response Area and briefly slowed aircraft outside the area where space vehicle debris was falling or stopped aircraft at their departure location. Several aircraft requested to divert due to low fuel levels while holding outside impacted areas.

Background

A mishap investigation is designed to enhance public safety, determine the root cause of the event, and identify corrective actions to avoid it from happening again. The FAA will be involved in every step of the SpaceX-led mishap investigation process and must approve SpaceX's final report, including any corrective actions. A return to flight is based on the FAA determining that any system, process, or procedure related to the mishap does not affect public safety.

A Debris Response Area is activated only if the space vehicle experiences an anomaly with debris falling outside of the identified closed aircraft hazard areas. It allows the FAA to direct aircraft to exit the area and prevent others from entering.


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