Skip to main content
Aviation

Return to Question

Post Closed as "Duplicate" by Mike Sowsun, sophit, GdD
definitely not a 747, per OP's other question ("Is the cockpit depicted in this movie from an Airbus A330?")
Link
edit approved Feb 13, 2023 at 21:46
300D7309EF17
edit approved Feb 13, 2023 at 21:46
300D7309EF17
  • 3.3k
  • 17
  • 27
added 183 characters in body
Source Link
trejder
trejder
  • 4.2k
  • 1
  • 32
  • 61

When watching the below clip:

at exactly 11:02, FO says that APU is not required.

What could be the reason for using APU on the ground? What good could this bring? EDIT: Both questions concerning depicted situation only -- i.e. a plane has landed in a quite very hot air.

I am a total noob to flying, but I was always more than sure that APU is used in air only. It is used to produce minimum electrical power to on-board equipment. Which means (as I assume) that there is zero electrical power when starting APU and it must be started when flying airplane generates enough airflow (through APU).Which means (as I assume) that there is zero electrical power when starting APU and it must be started when flying airplane generates enough airflow (through APU).

What am I missing? In which scenarios (EDIT: for depicted, landed airplane conditions) on the ground APU "could be required"? And how a ground speed of the after-landing rolling plane (very limited to airborne speed), generating minimum airflow, could start up the APU?And how a ground speed of the after-landing rolling plane (very limited to airborne speed), generating minimum airflow, could start up the APU?

When watching the below clip:

at exactly 11:02, FO says that APU is not required.

What could be the reason for using APU on the ground? What good could this bring?

I am a total noob to flying, but I was always more than sure that APU is used in air only. It is used to produce minimum electrical power to on-board equipment. Which means (as I assume) that there is zero electrical power when starting APU and it must be started when flying airplane generates enough airflow (through APU).

What am I missing? In which scenarios on the ground APU "could be required"? And how a ground speed of the after-landing rolling plane (very limited to airborne speed), generating minimum airflow, could start up the APU?

When watching the below clip:

at exactly 11:02, FO says that APU is not required.

What could be the reason for using APU on the ground? What good could this bring? EDIT: Both questions concerning depicted situation only -- i.e. a plane has landed in a quite very hot air.

I am a total noob to flying, but I was always more than sure that APU is used in air only. It is used to produce minimum electrical power to on-board equipment. Which means (as I assume) that there is zero electrical power when starting APU and it must be started when flying airplane generates enough airflow (through APU).

What am I missing? In which scenarios (EDIT: for depicted, landed airplane conditions) on the ground APU "could be required"? And how a ground speed of the after-landing rolling plane (very limited to airborne speed), generating minimum airflow, could start up the APU?

Source Link
trejder
trejder
  • 4.2k
  • 1
  • 32
  • 61

When and for what purpose APU is used on the ground?

When watching the below clip:

at exactly 11:02, FO says that APU is not required.

What could be the reason for using APU on the ground? What good could this bring?

I am a total noob to flying, but I was always more than sure that APU is used in air only. It is used to produce minimum electrical power to on-board equipment. Which means (as I assume) that there is zero electrical power when starting APU and it must be started when flying airplane generates enough airflow (through APU).

What am I missing? In which scenarios on the ground APU "could be required"? And how a ground speed of the after-landing rolling plane (very limited to airborne speed), generating minimum airflow, could start up the APU?