Can someone translate please?

[atckyrre]

Interesting. It's obviously a while since I studied German!

What threw me off was the word "geraten". I still don't quite get the meaning of it...

Oh well.

Kyrre

[Tomislav Haramincic]

Hello,

Just to add a small correction. "Trudeln" doesn't have to result in a spin if the controls are kept neutral. The term "Trudeln" simply means that the flow of air is separating from the airfoil, and so the amount of lift is reduced or completly lost. Generally, Peter si right when saying that the loss of speed is the main cause. More precise, the speed of the air flowing around the airfoil (wings or control surfaces) is important. Trudeln of the control surfaces is maybe more dangerous because the control surfaces than lose their efficiency.
For example when pulling the aircraft up after a steep dive following a combat roll at low speed - the rapid movement of the elevator causes the airflow around it to brake of the elevator is uneffective and you continue strait into the ground.
Trembling at the wing or control surfaces followed by a characteristic sound is the first sign of Trudeln.

All the best,
Tomislav

[Norbert Schuchbauer]

Hi Tomislav,
I think you are trying to describe Strömungsabriss or stall, which is the start of all Trudeln or spins.

Without a stall there is no spin. Yes, an aircraft can stall at all different speeds. The only variable in stalling an aircraft is the angle of attack of the wing. If you exceed the critical angle of attack you stall. And if you stall your aircraft in uncoordinated flight a spin will most likely result. If you keep your controls neutral in a propeller driven aircraft you are most likely in uncoordinated flight since other factors like torque, slipstream, p-factor need to be considered (those are turning inducing aerodynamic forcees).

During steep dives when the pullout maneuver fails it may also have to do with blanking the elevator by the main wing resulting in no airflow over this control surface and consequently rendering it useless.

Sorry, had to go to bat for a fellow pilot, Peter's translation is right on.

Regards,

Norbert

[Tomislav Haramincic]

hello Norbert,

Thanks for the additional corrections . Allways great to have people how can describe things out of first hand.


best regards,
Tomislav