Aircraft Technical question
1) If your static port became blocked, you could (in an extreme situation) break the glass of one of the pressure instruments in order to admit static pressure to the system. Which instrument would be most appropriate?
A The ASI (Air Speed Indicator)
B The altimeter
C The VSI (Vertical Speed Indicator)
D The AI (Attitude Indicator)
You chose B, but the correct answer was C.
Well looking at this, I don't know why I've been marked wrong.
A) This measures the difference between static & dynamic pressure and so breaking it will mix these pressures together, I thought
B) This only measures static pressure so seems the one to break
C) This measures a time displaced static pressure, so breaking it will probably only put static pressure into the later chamber
D) This works on gyros
So why would you break the VSI rather than the Altimeter ?