All instruments
Density altitude
Change elevation, pressure and temperature and see what happens to your take-off.
You clear the trees: at the end of the runway you are 100 ft up, 50 ft above them.
You clear the trees.
Heights are drawn larger than distances. The example aircraft follows a rule-of-thumb model at maximum mass, on a dry, level, hard runway without wind: for learning, not for flying.
Calculation
- Pressure altitude
- 0 ft
- ISA temperature there
- 15 °C
- Deviation
- Same as ISA
- Density altitude
- 0 ft
Example aircraft
- Air density
- 100% of ISA at sea level
- Ground roll
- 920 ft
- To 50 ft height
- 1,450 ft
- Climb
- 700 ft/min · 9.2 %
In the tasks you first work out the density altitude. Then you see whether the example aircraft clears the trees.