Pressure & Density Altitude Calculations

Pressure & Density Altitude Calculations

Know you basics to help you master flight planning

Poll

ISA standard mean sea level pressure value any where in the world is:

• 1013 hPa

• 29.92 inches of mercury

• 1.013 newtons

• 15 degrees

Fill in the Blanks

The pressure on a given day is 1000 hPa at Mount Hotham Airport. What is the pressure altitude on this given day considering the airport elevation is 4500ft above sea level?

Multiple Choice

On this day at Mount Hotham Airport the pressure reading is 1030 hPa and the altitude above mean sea level is 4500ft. What is the pressure altitude on this day?

• 3990ft

• 3980ft

• 5010ft

• 5020ft

Poll

Which is the best legal publication to use to find out information about an airport (such as altitude above mean sea level and runway directions?

• ERSA

• AIP

• CASA Website

• VFRG

Multiple Select

The altitude at Amberly Airport is?

• 91ft

• 910ft

• 91 meters

• 910 meters

Fill in the Blanks

Runway 15/33; its length at Amberly Airport is?

Poll

To calculate density altitude, one must first calculate the pressure altitude.

• True

• False

• Sometimes

• Always

Fill in the Blanks

The pressure at Murray Bridge Airport is 1018 hPa and the temperature is 25 degrees, calculate the density height given that the temperature should be close to 15 degrees on a given day (elevation 180ft AMSL). For each degree difference multiply it by 120ft. You decide whether to add it or subtract it from the pressure altitude calculation.. Work in teams to solve.

Note: temperature is said to decrease by 2 degrees every /1000ft as you climb from sea level up to a higher altitude. What should be the temperature according to ISA at Murray Bridge?

Fill in the Blanks

The temperature at Mount Hotham Airport is 0 degrees and the pressure is 1003 hPa. Calculate the density height on this given day?