Chapter 6.3 - Calculations & Conversions Flashcards
What does WV stand for?
Wind Velocity.
What does WV express?
Wind Speed and Direction.
Express WV for 230/15?
Wind Direction is coming 230° at a Speed of 15kt.
What is Wind Angle?
Angle between Wind Direction and Takeoff/Landing Direction.
How do you calculate Wind coming from the Left of an Aircraft?
Subtract Wind Direction from Runway Direction.
How do you calculate Wind coming from the Right of an Aircraft?
Subtract Runway Direction from Wind Direction.
If Wind Angle is greater than 90° what component is a pilot facing?
Tailwind.
The Speed of Wind Components must be calculated so that pilot can do what (2)?
- Work out Crosswind Component vs Maximum Crosswind of the Aircraft.
- Headwind/Tailwind Component can be used in Performance Charts of an Aircraft.
What does WS stand for?
Wind Speed.
What’s the percentage of Headwind and Crosswind with Wind Angle between 0° – 20°?
- Headwind = 100%.
- Crosswind = 0%.
What’s the percentage of Headwind and Crosswind with Wind Angle between 20° – 40°?
- Headwind = 90%.
- Crosswind = 50%.
What’s the percentage of Headwind and Crosswind with Wind Angle between 40° – 50°?
- Headwind = 70%.
- Crosswind = 70%.
What’s the percentage of Headwind and Crosswind with Wind Angle between 50° – 70°?
- Headwind = 50%.
- Crosswind = 90%.
What’s the percentage of Headwind and Crosswind with Wind Angle between 70° – 90°?
- Headwind = 0%.
- Crosswind = 100%.
What’s the percentage of Tailwind and Crosswind with Wind Angle between 90° – 110°?
- Tailwind = 0%.
- Crosswind = 100%.
What’s the percentage of Tailwind and Crosswind with Wind Angle between 110° – 130°?
- Tailwind = 50%.
- Crosswind = 90%.
What’s the percentage of Tailwind and Crosswind with Wind Angle between 130° – 140°?
- Tailwind = 70%.
- Crosswind = 70%.
What’s the percentage of Tailwind and Crosswind with Wind Angle between 140° – 160°?
- Tailwind = 90%.
- Crosswind = 50%.
What’s the percentage of Tailwind and Crosswind with Wind Angle between 160° – 180°?
- Tailwind = 100%.
- Crosswind = 0%.
What’s the conversion factor for M to Ft?
1M = 3.3FT.
What’s the conversion factor for NM to KM?
1NM = 1.9KM.
What’s the conversion factor for KG to LBS?
1KG = 2.2LBS.
What’s the conversion factor for US Gal to L?
1US Gal = 3.8L.
How should you round up Fuel Volumes for Litres and US Gallon?
- Litres to the next whole number.
- US Gallon to the next half number.
What is the Specific Gravity Ratio?
Weight of Unit Fuel to Weight of Same Volume in Pure Water.
What is the Specific Gravity of AVGAS?
SG = 0.70.
What is the Specific Gravity of Aviation Oil?
SG = 0.90.
How can a pilot find the Local QNH?
By turning the subscale setting until the Altimeter indicates the level of Elevation of the Aerodrome.
How can a pilot find the Pressure Height at an Aerodrome?
Set the Pressure Setting Scale to 1013 hPa. The reading on the Altimeter is the Pressure Height.
How can a pilot find the Elevation of an Aerodrome when QNH is known?
Set the Pressure Setting Scale to Local/Area QNH. The reading on the Altimeter is the Pressure Height.
What does PH stand for?
Pressure Height.
How do you find the Pressure Height?
The Altimeter reading when the pressure subscale setting is set at 1013 hPa.
What is the International Standard Atmosphere Mean Sea Level Datum?
1013 hPa.
As Atmospheric Pressure decreases by 1 hPa, how much height is increased?
30ft.
When QNH is less than 1013 hPa what calculation is made to Elevation?
Add.
When QNH is more than 1013 hPa what calculation is made to Elevation?
Subtract.
If a pilot wants to know the Height what do you need to set on the Altimeter?
Pressure.
If a pilot wants to know the Pressure what do you need to set on the Altimeter?
Height.
How is Density Height determined from (2)?
- Pressure Height.
- Outside Air Temperature.
What does OAT stand for?
Outside Air Temperature.
How many Degree Celsius is added on top of the International Standard Atmosphere Temperature at Sea Level?
15°.
For every 1000ft gained what happens to Degrees Celsius?
Reduces by 2°.
For every 1000ft lost what happens to Degrees Celsius?
Increases by 2°.
