What is a high bypass ratio engine?
What is a high bypass ratio engine?
In a high bypass design, the vast majority of the thrust is derived from the ducted fan, rather than from combustion gases expanding in a nozzle.
A high bypass ratio provides a lower thrust specific fuel consumption (grams/sec fuel per unit of thrust in kN using SI units), especially at zero velocity (at takeoff) and at the cruise speed of most commercial jet aircraft.
Explain the Fohn wind.
Explain the Fohn wind.
A Fohn wind is a warm dry wind that blows down the lee side of a mountain.
Initially, the air temperature cools dry-adiabatically (3°C/1000 ft), until its dew point temperature is reached. Condensation occurs as the air is further forced up the mountain range, resulting in the air cooling saturated-adiabatically (generally considered in the mid-latitudes to be 1.8°C/1000 ft). Clouds and precipitation form. When the air mass reaches the top of the mountain range it has lost a significant amount of its water content and so has a much lower dew point temperature.
As the air then begins to descend down the lee slope of the mountain the compressed air is initially heated saturated-adiabatically, and in effect the direct reverse to the cooling effect on the windward side occurs. As the air continues leeward and downward from the mountain range, the air, now no longer saturated, is heated dry-adiabatically.
The resultant wind is dry and warm giving clear conditions at airfields on the lee side of the mountain range.
The Foehn Effect also may be associated with mountain wave activity.
Is the Seneca turbocharged?
Is the Seneca turbocharged?
We are missing the answer.
What do the abbreviations TSRA and MIFG mean?
What do the abbreviations TSRA and MIFG mean?
TSRA: Thunderstorm with rain
- MIFG: Shallow fog
On A high wing anhedral airplane, like a BAE146, and a high wing straight winged aircraft like a Fokker 50, why they don’t have dihedral wings if it has so many advantages?
On A high wing anhedral airplane, like a BAE146, and a high wing straight winged aircraft like a Fokker 50, why they don’t have dihedral wings if it has so many advantages?
A high wing location like the BAE and the Fokker give a natural stable contribution.
This is because the Center of Gravity is underneath the wing, therefore when disturbed the C.G. provides a positive momentum opposite to the distortion.
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.
Describe the take off segments.
Describe the take off segments.
1st segment starts at screen height and finishes at gear retracted.
2nd segment starts when the gear is retracted and finishes when acceleration alt is reached (min. 400ft max 1000ft) speed V2.
3rd segment starts at acceleration alt, minimum 400ft, and finishes when the flaps are retracted.
4th segment starts when the flaps are retracted, MCT is set and finishes at the 1500ft.
What is lift?
What is lift?
Lift is the component of the total aerodynamic force perpendicular to the relative airflow.
Lift is generated when a streamlined body, such as an aerofoil, is placed in a flow of air.
What is an orographic cloud?
What is an orographic cloud?
An orographic cloud is formed as the air rises up the slope and will often envelope the summit.
When the air is humid, some of the moisture will fall on the windward slope and on the summit of the mountain.
How can you calculate the range of a VOR?
How can you calculate the range of a VOR?
By using the formula: Range (nm) = 1.23(√H1 + √H2)
H1=height of transmitter (feet)
H2=height of receiver (feet)