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 is a Great Circle?

What is a Great Circle?

A line of shortest distance between two points on a sphere.

If you are flying your light twin, how would you ensure minimum obstacle clearance if your engine fails on take off? How would you do this, or, where can you find the relevant information?

If you are flying your light twin, how would you ensure minimum obstacle clearance if your engine fails on take off? How would you do this, or, where can you find the relevant information?

In the airplane documents, as the airplane is certificated regarding performance to be able to fly blue line speed (or Vyse) in this situation, so I would climb at this speed to ensure minimum obstacle clearance.

What is the critical angle of attack?

What is the critical angle of attack?

The critical angle of attack is the angle of attack which produces maximum lift coefficient.

This is also called the "stall angle of attack".

Why does a wing stall?

Why does a wing stall?

A wing stalls because the airflow over the wing’s upper surface separates when the critical angle of attack is reached or exceeded. This causes a reduction in the lift generated by the aerofoil

What is wing loading?

What is wing loading?

Wing loading is the loaded weight of the aircraft divided by the area of the wing.

The faster an aircraft flies, the more lift is produced by each unit area of the wing. Correspondingly, the landing and take-off speeds will be higher and the high wing loading also decreases maneuverability.

What is profile drag?

What is profile drag?

Profile drag, also known as pressure drag or form drag, is the drag caused by the separation of the boundary layer from a surface and the wake created by that separation.

It is primarily dependent upon the shape of the object and increases directly with speed as the faster an aircraft moves the more air molecules collide with it.

What is the average temperature at 25,000ft according to ISA?

What is the average temperature at 25,000ft according to ISA?

-35°C

Can you explain to me what Mach tuck is?

Can you explain to me what Mach tuck is?

Mach tuck is a nose-down pitching moment experienced as an aircraft passes Mcrit.

Mach tuck is a form of longitudinal instability that is caused by the centre of pressures rearward movement (caused by the shock wave) behind the centre of gravity.

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

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