Page 481 - PPL-engelsk 2025
P. 481
Principles of flight
If nothing is done,
the aircraft will
continue in a spiral
dive to the right.
Here is an aircraft with the ailerons in a position required for a right turn.
The aircraft must bank to
the right.
When it does, lift must be
created on the left wing,
and the lift on the right
wing must be reduced.
With the creation of lift comes increased formation of wing tip vortices =
increased induced drag!
This drag will give a backward force on the left wing, which in turn causes the
nose of the aircraft to turn to the left.
The intention was a right turn, but the nose of the aircraft turned to the left.
There are 3 design methods for solving this problem.
- Differential aileron deflection
- Frieze aileron
- Control lines
Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 481
