Are jet streams there all year round?

Are jet streams there all year round?

Yes.

There are permanent jet streams in the...

What do airplanes have to guard against reaching Mcrit?

What do airplanes have to guard against reaching Mcrit?

Barber pole on the ASI, flying at a Mach number at altitude and audible warnings.

What are the advantages of operating a one aircraft type fleet, why don’t we use an A320 / B737 mixed fleet?

What are the advantages of operating a one aircraft type fleet, why don’t we use an A320 / B737 mixed fleet?

The FMA indicates what system is controlling the aircraft and what mode is operational.

How does an IRS work?

How does an IRS work?

An IRS is an Inertial Reference System  which consists of accelerometers, gyroscopes (laser) and a position computer.

The computer calculates the aircrafts position by direction and velocity sensed by the accelerometers from the initial latitude and longitude input.

An IRS enables the aircraft to fly great circle tracks and to navigate accurately across vast expanses where no ground based navigation aids are available.

How does a jet engine/gas turbine work?

How does a jet engine/gas turbine work?

Forward motion forces air into the intake which is a convergent duct where it is compressed (causing a temperature rise).

Fuel is added and combustion takes place increasing the volume. The expanding gasses accelerate to the atmosphere through the exhaust duct nozzle producing a propulsive jet.

Why is a great circle the shortest distance between two points?

Why is a great circle the shortest distance between two points?

The track changes constantly.

What is a Great Circle?

What is a Great Circle?

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

What does a bypass ratio of 11:1 mean?

What does a bypass ratio of 11:1 mean?

For every 1kg of air passing through the combustion chamber, 11kg of air pass bypass the combustion chamber.

What is the mean chord line?

What is the mean chord line?

It's the wing area divided by the wing span.

How does an aerofoil work?

How does an aerofoil work?

An aerofoil is a body shaped to produce an aerodynamic reaction (lift) perpendicular to its direction of motion, for a small resistance (drag) force in that plane. It achieves this by accelerating the flow passing over it, and decelerating the flow passing under it. This change in velocity causes a change in pressure, which in turn generates lift.

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