Why does the speed tape on the PFD reads 45kt when the aircraft is stationary?

Why does the speed tape on the PFD reads 45kt when the aircraft is stationary?

The speed is too low for an indication.

What does the abbreviation MSA mean?

What does the abbreviation MSA mean?

Minimum Safe Altitude.

What is tire creep, and is it important?

What is tire creep, and is it important?

Tire creep is the tendency of the tire to rotate slowly around the wheel hub as a result of a millisecond landing friction on the tire before wheel spin occurs.

Yes, it is important because if there is too much creep the tire can tear out the inflation valve and cause the tire to burst.

Where does the wing stall first on a typical SEP Aircraft (Cessna, Tecnam, ...)?

Where does the wing stall first on a typical SEP Aircraft (Cessna, Tecnam, ...)?

At the wing root. This is a property of rectangular wings, but it's also common to find close to the wing root devices that make it so that the wing root stalls first.

How does GPWS work?

How does GPWS work?

GPWS is a central computer system that receives various data inputs on configuration, (radio altimeter) height/altitude and instrument landing system glide slope deviation and is able to alert the pilot when a dangerous situation is about to occur.

On a tapered wing, where would the stall occur first?

On a tapered wing, where would the stall occur first?

At the tip as downwash and spanwise flow effect the angle of attack at each section, but because of the tapered wing the effective angle of attack near the tips is greater than that near the center.

What is the difference between angle of attack and angle of incidence?

What is the difference between angle of attack and angle of incidence?

Angle of attack is the angle between the chord of the aerofoil and the relative airflow.

Angle of incidence is the angle between the chord and the aircrafts longitudinal datum.

What is N1, N2, EGT and EPR?

What is N1, N2, EGT and EPR?

N1= Low pressure compressor spool or fan rotation speed. Usually expressed as a % of Max N1.

N2= High pressure compressor rotation speed.

EGT= Exhaust gas temperature, indicates the temperature at the first stage of the turbine, which is the most critical temperature in the engine.

EPR= Engine pressure ratio of the inlet to the jet pipe, displayed on the EPR gauge to use as a parameter for setting engine thrust

If you climb to FL300 at a constant IAS of 250kts, what would happen to the TAS?

If you climb to FL300 at a constant IAS of 250kts, what would happen to the TAS?

TAS will increase.

What is windshear?

What is windshear?

Windshear is a change of wind speed and/or direction from place to place, including updraughts and down draughts.

It is ussualy characterized by a strong change over a short distance. Windshear can effect the flight path and airspeed and can be hazardous.

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