Page 510 - PPL-engelsk 2025
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Principles of flight
5.10.2.1 Best climb angle and best climb rate
Different speeds can be used for climbing.
However, there are 2 significant climb speeds:
- Vx is the climb speed we need to achieve the steepest climb. This means
that we get the most feet higher per distance.
- Vy is the climb speed we need to get to a given altitude the fastest, in
relation to time.
5.10.2.2 Best climb rate Vy
The illustration here shows how to find the best climb rate (where we get the
most feet per unit of time).
Where the distance between the 2 lines
is greatest, the speed for Vy (yellow
arrow) is found.
This is where there is the greatest
surplus of power, and where we can
climb the highest number of feet per
minute.
The speed will change with increasing
altitude, so that Vy becomes smaller the higher you climb.
Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 510
