Power required and TAS
Hi guys,
I read a Flying magazine article some months ago talking about the movie "The Martian" and if it was scientifically "accurate".
It got me thinking about power required and I realised I never really understood why power required increases with TAS (I completed ATP theory).
Could you explain me why more power is required to fly 150 KIAS at FL300 than at 5000 feet ? I know it's not an engine perf consideration, so is it a physical law ?
Many thanks in advance