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#1726 2023-11-24 09:40:39

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 28,632

Re: Starship is Go...

bump

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#1727 2024-01-13 15:43:05

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 28,632

Re: Starship is Go...

Starship: Elon musk calls world's heaviest rocket too light to reach orbit

"Flight 2 actually almost made it to orbit. In fact, ironically, if it had a payload it would have made it to orbit. Because the reason that it actually didn't quite make it to orbit was we vented the oxygen, and liquid oxygen ultimately led to fire and an explosion. Because we wanted to vent the liquid oxygen because we normally wouldn't have that liquid oxygen if we had payload. So, ironically, if it had a payload it would have reached orbit," Musk said.

So, the ship is going to need to have even more fuel to be able to get all payload to orbit and if the tanks were at capacity that will be a problem.

Musk, however, was still being determined by the loss of hardware and said that he was willing to sacrifice more rockets if it meant that Starship would be operational sooner. "It is always better to sacrifice hardware than sacrifice time. Like, time is the one true currency," he said.

He also outlined the new goals for the third integrated test flight, scheduled for February, pending approval from the Federal Aviation Administration (FAA). These include performing an in-space engine burn from a header tank, a smaller propellant tank that feeds the engines during landing, and safely deorbiting the spacecraft.

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#1728 2024-01-23 15:28:27

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 28,632

Re: Starship is Go...

Now we know why Starship's second flight test failed

Elon Musk explained how a fuel venting near the end of the burn was responsible but entirely avoidable next time. lack of a payload meant that it needed to vent some of the liquid oxygen propellant. The booster almost made it to orbit and would have succeeded if it had had a payload.

So knowing cargo mass determines fuel loading with little margin for error

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#1729 2024-01-24 11:42:51

GW Johnson
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From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 5,383
Website

Re: Starship is Go...

I think I already addressed this in another thread. 

The mistake was venting while the engines were burning.  The vehicle is still accelerating,  so anything you vent anywhere laterally,  effectively moves at the vehicle acceleration rate to the rear of the vehicle,  where it can get entrained into the gases between and among the engines in the engine bay. 

Had they waited to vent until the engines shut down,  laterally vented oxygen would have continued its lateral location and motions,  far from the hot stuff in the engine bay. 

This is elementary fire triangle stuff.  It should have been foreseen. 

GW


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

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#1730 2024-01-24 17:40:34

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 28,632

Re: Starship is Go...

Starship v3 just grew to stack of 150M making the ship even larger

https://youtu.be/ZbQ7XXRzLMc?si=VhRcGXL7OhJMl17O

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#1731 2024-01-27 12:10:28

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 28,632

Re: Starship is Go...

image from next big thing page of startships timeline

The 2030 build up for first flights to the 2050 timeframe that is the intense period of man build up from exploration to settlement building.
The future mining to get nanorods to cause heating will require to many launches to achieve the goal.

Like all things with an aggressive time schedule there is bound to be problems with safety of personnel.
Musk's SpaceX sued for negligence in accident that led to worker's coma

Was trying to make posts when 60 plus guests were on the site which seem to be causing delay of page movement and all forms of web activity.

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#1733 2024-02-03 11:39:56

GW Johnson
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From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 5,383
Website

Re: Starship is Go...

NASA hire SpaceX for its Mars trip?  I wondered when that might happen!  Especially since NASA has been doing none of the things necessary to send humans to Mars.  $4B-a-launch SLS's sure as hell aren't the vehicle. 

GW


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

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#1734 2024-02-13 12:51:00

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 28,632

Re: Starship is Go...

SpaceX boss Elon Musk predicts date of next Starship test flight expects the third Starship test flight to launch “in about three weeks.”

Elon Musk hints Starship to soon break NASA's human spaceflight record by reaching the moon within five years, pave the way for a private space station, and even pique the interest of the Pentagon for sensitive missions.

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