Electric power consumption onboard
I understand that big jet airliners generated its own electricity for its in-flight operation. I assume the electric power is a must to run;
- Cabin lighting and cabin entertainment system
- Cabin heating
- Galley food preparation system
- Hydraulic pumps or actuators
- Flight controls
- Navigational system and radio communicaton
- External lights, strobo-light, spotlight to tail fin.
- Any other electrical devices (?)
I am just curious about how much kilowatt required for B747 , B 777, A340 or smaller B737, A320 ?
If compared to the airplane propulsion power, how many percent this electric power will consume the energy from burned fuel?