NASA rolls Artemis II back to hangar for repairs

Key Concepts

• Artemis 2: NASA’s upcoming crewed mission to orbit the Moon.
• Helium System Malfunction: A leak in the helium system of the Artemis 2 rocket’s upper stage, requiring repairs.
• Vehicle Assembly Building (VAB): The facility at Kennedy Space Center where the rocket will be moved for repairs.
• Crawler Transporter: The massive vehicle used to transport the rocket and mobile launcher.
• Mobile Launch Platform: The platform upon which the rocket is secured for launch and transport.
• Launch Windows: Specific periods of time when launch conditions are optimal.

Artemis 2 Rollback & Repair Details

NASA is currently rolling back the Artemis 2 rocket from the launch pad at the Kennedy Space Center in Florida due to a malfunction in its helium system. The rollback process is expected to take up to 12 hours to cover a distance of four miles, returning the 322-foot rocket to the Vehicle Assembly Building (VAB) for repairs. The rocket had been on the launch pad for approximately one month, prepared for a potential launch, but repeated issues have delayed the launch date.

The most recent problem centers around the inability to repressurize the upper stage of the rocket with helium during a fueling test conducted last week. Helium is crucial for pushing propellants to the engines and draining the tanks after fueling operations. The inability to repressurize indicates a leak or other issue within the helium system that cannot be addressed while the rocket is on the launch pad. Access for repairs requires the rocket to be inside the VAB, where work platforms can be deployed.

Impact on Launch Schedule

The rollback to the VAB will delay the launch of Artemis 2 to no earlier than April 1st. This delay is attributed both to the time required for repairs and the limited number of available launch windows dictated by various technical constraints. The original target launch timeframe was March of this year.

The Rollback Process: A Detailed Look

The process of moving the Artemis 2 rocket involves utilizing the same methodology employed during the Space Shuttle program. The rocket is secured atop a Mobile Launch Platform. Beneath the launch pad, a Crawler Transporter – a remnant from the Apollo era – is positioned. This Crawler Transporter lifts the entire assembly and slowly transports it back to the VAB.

The scale of this operation is significant. The Crawler Transporter itself weighs 6.6 million pounds. The Mobile Launch Platform supporting the rocket weighs 11 million pounds, and the rocket itself weighs nearly 4 million pounds. This results in a total moving weight of 23 million pounds traveling at a speed of only 1 mile per hour along a dedicated “crawler way.”

Significance of the Artemis 2 Mission

Artemis 2 is a historically significant mission, aiming to fly four astronauts around the Moon for the first time in decades. The mission represents a major step in NASA’s renewed lunar exploration program. As Bill Harwood, CBS News space consultant, stated, the mission is “eyeing a historic mission to fly four astronauts around the moon for the first time in decades.”