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  [Discuss] SpaceX CRS-25 station mission

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Author Topic:   [Discuss] SpaceX CRS-25 station mission
Robert Pearlman
Editor

Posts: 48604
From: Houston, TX
Registered: Nov 1999

posted 06-06-2022 10:50 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Please use this topic to discuss SpaceX's twenty-fifth Dragon cargo flight (CRS-25) to the International Space Station under NASA's Commercial Resupply Services contract.

Robert Pearlman
Editor

Posts: 48604
From: Houston, TX
Registered: Nov 1999

posted 06-06-2022 10:52 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
NASA and SpaceX had been targeting Friday, June 10 for the launch of CRS-25. The flight has now been delayed, per NASA:
NASA's SpaceX CRS-25 is no longer launching on Friday or Saturday. Teams are assessing and meeting later today to discuss path forward. More to come this afternoon.

Robert Pearlman
Editor

Posts: 48604
From: Houston, TX
Registered: Nov 1999

posted 06-06-2022 06:07 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
NASA update
Dragon Mission on Hold

NASA and SpaceX are standing down from this week's Falcon 9 launch of the CRS-25 cargo mission to the International Space Station. Officials from NASA and SpaceX met today to discuss an issue identified over the weekend and the best path forward.

During propellant loading of the Dragon spacecraft, elevated vapor readings of mono-methyl hydrazine (MMH) were measured in an isolated region of the Draco thruster propulsion system. The propellant and oxidizer have been offloaded from that region to support further inspections and testing. Once the exact source of the elevated readings is identified and cause is determined, the joint NASA and SpaceX teams will determine and announce a new target launch date.

Robert Pearlman
Editor

Posts: 48604
From: Houston, TX
Registered: Nov 1999

posted 06-13-2022 05:44 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
NASA update
Launch Now NET July 11

NASA and SpaceX officials met today to discuss the initial findings from additional inspections and testing of the Dragon spacecraft after teams measured elevated vapor readings of mono-methyl hydrazine (MMH) in an isolated region of the Dragon propulsion system. After offloading propellant from that region, SpaceX was able to narrow down the source of the issue to a Draco thruster valve inlet joint.

Teams will now remove the specific hardware to replace it ahead of flight.

NASA and SpaceX are now targeting no earlier than July 11 for launch of the CRS-25 cargo resupply mission to the International Space Station.

Robert Pearlman
Editor

Posts: 48604
From: Houston, TX
Registered: Nov 1999

posted 06-28-2022 09:17 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
NASA update
NASA, SpaceX Target New Launch Date for CRS-25

NASA and SpaceX now are targeting no earlier than Wednesday, July 14, for launch of the CRS-25 commercial resupply services mission to the International Space Station.

The new target launch date supports ongoing Dragon spacecraft inspections as well as repair and replacement of any components that could have degraded by exposure to mono-methyl hydrazine (MMH) vapor found during testing in early June. In order to allow a more detailed off-vehicle inspection of the parachutes, the SpaceX team made the decision to replace the main parachutes on this spacecraft.

The new date also allows for launch of the uncrewed cargo mission for the earliest possible rendezvous opportunity with the International Space Station following the upcoming high-beta angle period when the sun angle with space station’s orbital plane causes problems with thermal and power generation at the microgravity laboratory in the planned docking attitude for visiting spacecraft.

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