PPB3 Instruments

A. "The turn coordinator is designed so that it reflects roll rate as well as turn rate." The needle indicates the rate of turn; the ball shows the quality of the turn. (3-8)

C. "You should check the heading indicator against the magnetic compass at least every 15 minutes, and more often if the instrument is showing signs of age such as grinding noises or rapid precession" (3-10)

Note: do this only at straight-and-level flight, or else the compass will probably be off.

A. Remember the memory aid they gave you: ANDS - Accelerate (moves the compass) North; Decelerate South. (3-11)

C. "Magnetic deviation... is caused by external forces. The magnetic influence of steel engine parts and electrical wiring cause the deviation" (3-12)

B. "When you turn from a generally northerly heading, the compass will momentarily turn in the opposite direction, slow to a stop, and then follow the progress of the turn" (3-11).

C. High temperature-> high pressure-> low altimeter. This means you're higher than you think you are. Low temperature-> low pressure-> high altimeter. This is the dangerous one, because you're closer to the ground than you think! (3-7)

A. The 29 on the altimeter is 29 thousands. Think of the decimal point as a comma. (3-6)

A. see p3-2. The indicator gets pressure from the air going into the pitot and compares it to the unchanging pressure from the static port (on the back of our pitot tube; on the fuselage for some others)

Note: These ARE the three instruments from the "sixpack" that get their information from the pitot system!

a. LO... isn't in the book and has to do with landing (Landing gear Operating). NE stands for Never Exceed. (3-3/4)

C. Check out p3-3. The white is at the beginning, slow speeds for power-off stall landings and flaps. Green is all safe speeds (in smooth air), starting with the white and ending where the yellow arc (the caution range) starts.

B. Check out p3-3. The upper limit of the white arc is the max speed with all flaps extended (FE), and the green arc starts at the power-off stall speed with gear and flaps up (S1)