How to keep something flying?

If you have any questions about flight or whatever feel free to ask, And I'll do my best to answer.

To keep a Airplane flying you can lock the current heading and make the pitch higher so it stays at a set altitude, You also have to keep the throttle at a set percentage.

I do 100% until I reach 30k feet then do about 90% to 70% thrust.

Then when your happy as you exit the game click save flight and bam. It's there when you want to use it.