# B Air resistance that affects jets and people

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1. Jul 29, 2017

I wanted to ask. Since jets fly at great speed, often even supersonic, I'm curious about next things:
1) What is the relation between air resistance force and energy?
2) How does all that force resistance affect a pilot?
3) What protection do they have, if any?
4) And purely speculative quesion -- what would happen to a pilot going with the same supersonic speed, but without the jet?

2. Jul 29, 2017

### phinds

Have you done any searcher on any of this? If you are under the impression that this is just a Q&A forum where you ask any old question and get an answer, you are mistaken. It is expected that a poster will have shown some effort to answer his own question and will show what he knows so far and what he doesn't understand that he needs help with.

3. Jul 29, 2017

### olgerm

$F_{res}=F_{engine}-F_{air\ resistance}$
$\frac{\partial E_{energy\ used\ by\ engines}}{\partial t}=F_{engine} \cdot v_{plane}$
if plane flys with constant speed, then $\frac{\partial E_{energy\ used\ by\ engines}}{\partial t}=F_{air\ resistance} \cdot v_{plane}$

He has to give more throttle to get same acceleration.

if it is not open aircraft, then air resistance force does not directly act on pilot.