• 2 Posts
  • 32 Comments
Joined 2 years ago
cake
Cake day: June 27th, 2023

help-circle


  • How will the transition from 5 to 3 engines on the Booster landing burn add additional redundancy? How is that different from going straight to 3 engines?

    Previously the 3 engine landing burn was for about 16 seconds. If there was a 5 second burn with 5 engines then that would be followed by a 7 or 8 second burn with 3 engines, giving a total elapsed burn time of 13 seconds.

    Is there a gap between the 5 engine burn and the 3 engine burn or will they just switch off two engines after 5 seconds. Does that mean that they can then choose which two to turn off and avoid the need to allow for the 0.2 seconds engine startup time that would be needed if there was a failure of one of the 3 engines. Is that the only benefit of a 5-3 landing burn?














  • From: https://www.faa.gov/space/compliance_enforcement_mishap

    When does the vehicle-type involved in the mishap return to flight? A return to flight operations of the vehicle type involved in the mishap is ultimately based on public safety. The operator plays a significant role in the process to return to operations and is responsible for submitting a final mishap investigation report to the FAA for review and approval that details needed corrective actions. All required corrective actions must be implemented prior to the next flight unless otherwise approved. Based on the nature of the corrective actions, the operator may be required to submit either a license modification request or a new license application. These actions may occur concurrently. In summary, the FAA will not allow a return to flight operations until it determines that any system, process, or procedure related to the mishap does not affect public safety or any other aspect of the operator’s license. This is standard practice for all mishap investigations.