Artemis I is the first in a series of increasingly complex missions that will enable human exploration to the Moon and Mars.The primary operation's goal of the mission is to assure a safe crew module entry, descent, splashdown, and recovery. In addition to sending Orion on its journey around the Moon, SLS will carry 10 small satellites that will perform their own science and technology investigations. The first in a series of increasingly complex missions, Artemis I will provide a foundation for human deep space exploration and demonstrate our commitment and capability to extend human existence to the Moon and beyond prior to the first flight with crew on Artemis II.
Why did NASA Postpone the launch?
Before launching the launch status is checked to ensure
safety. If anything floods suspicious the team check and tries to rectify the
whole problem.
An American spaceflight mission begins with a launch status check, commonly referred to as a "go/no go poll" and other terminology, in which flight controllers monitoring various systems are questioned for operation and readiness status before a launch can proceed. The NASA Test Director (NTD) conducted this check for Space Shuttle flights in the firing chamber at the Launch Control Center using a voice communications link with other NASA employees
Technical Reasons
As one of the four RS-25 engines on the Space Launch System
(SLS) rocket failed during the tanking stages, NASA decided to delay the launch
of the Artemis 1 mission. In order to condition the four liquid-propelled
engines prior to launch, they were meant to be bled with liquid hydrogen and
oxygen, however team engineers discovered that engine number 3 was not bled as
anticipated. The following launch window will be open on Friday, September 2.
However, NASA has not yet said if it will attempt again on that day.
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Boosters for Artemis I mission |
To increase pressure and allow the tank to vent through the third engine, the team initially suggested closing the pre-valves on engines 1, 2, and 4. However, even after conducting all of this troubleshooting, the teams were unable to find the engine bleed on engine number 3 that they were looking for. When the hydrogen team came up with fresh potential troubleshooting ideas they could discuss with the director, NASA decided to pause the countdown clock at T-minus 40 minutes.
Crack in the tank
Another problem that arisen during tank operations was what appeared to be a break in the gasket of the inner tank. In the higher stage, there was some frost buildup and evidence of vapour trails, which suggested a possible structural flaw in the tank. Engineers assessed the images captured by the camera and determined that the tank had no structural cracks. Instead, air that was frozen and confined inside a break in the form created the ice.
The leakage of Hydrogen
The Artemis launch team saw an increase in the amount of hydrogen that was permitted to leak into the purge can, which exceeded 4%, as they switched from "slow filling" to "rapid filling" hydrogen. I'll respond to it. The team examined all the data and reduced hydrogen filling until the leak was below the maximum allowable levels. Even after the team started filling the tank quickly again, the problem did not come up again.
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| RS -25 ENGINE |
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