What is the meaning of the red range on the airspeed indicator?

Question

Question PPL(H) - Private Pilot License - Aircraft General Knowledge

QuizVDS · Accepted Answer

Speed which must not be exceeded regardless of circumstances

QuizVDS · Answer

Speed which must not be exceeded within bumpy air

QuizVDS · Answer

Speed which must not be exceeded with flaps extended

QuizVDS · Answer

Speed which must not be exceeded in turns with more than 45° bank

Id 198 - PPL(H) EN - What is the meaning of the red range on the airspeed indicator?