Can plane climb without increase pitch angle? As I know plane climb &quot;with nose up&quot;, but can plane climb without change pitch angle?
Can I force plane to climb like this:
If I  fly in straight level flight at 100km/h and now increase just speed at 180km/h without any change at tail/wing.
1.Will plane climb with no change in pitch angle?
2.Or maybe will plane pitch up by itself?
Basically a plane will climb, descend or maintain altitude depending on two things: the angle of attack of the wing, and airspeed.
So, yes, it is possible to trasition from level flight to climb just by increasing speed, because as the speed increases, there is more airflow around the wing, and it will create more lift.
Also, generally planes have a natural tendency to pitch up if speed is increased and nothing else is done, further adding to the climb speed. Aeroplanes tend to &quot;try&quot; and maintain the speed they are trimmed to, hence the upward pitch as the plane is seeking to shed the excess airspeed by transitioning the extra energy into altitude gain.