Instruments

Question 1

What is IAS? Measured by which instrument? How?

Answer 1

Indicated Air Speed.
Measured by Air Speed Indicator.
Takes the dynamic pressure from the pitot tube and subtracts it from the static pressure from the static vent.

Question 2

What is CAS?

Answer 2

Calibrated Air Speed. IAS calibrated for instrument and position error.

(I googled this once; “instrument error” is due to the fact that the pressure envelope is different across the plane’s leading edges, especially across the pitot tube versus elsewhere on the plane.)

Question 3

What is TAS?

Answer 3

True Air Speed; speed relative to air mass.

Question 4

What is GS?

Answer 4

Ground speed; speed relative to ground.

Question 5

(Plane’s changes in orientation) What are the three Movements? What is “movement” with respect to?

Answer 5

Roll, Pitch, Yaw.

Movement is with respect to the plane.

Question 6

(Plane’s changes in orientation) What are the two attitudes? What is “attitude” with respect to? What are their respective movements?

Answer 6

Bank, Nose up/down.

Attitude is with respect to the horizon.
Bank -> Roll;
Nose up/down -> pitch.