Page 691 - PPL-engelsk 2025
P. 691
Aircraft general knowledge
8.3.5.3 Hydraulic brakes
A little further up the page you could
see a picture of the pedals, which are
connected to both the rudder and in
most cases also the nose wheel.
In addition to this, the aircraft's main
wheels may be equipped with
hydraulic brakes, which are operated via the pedals.
If the brake feels springy, it may be due to air in the system.
If the pedal can go almost to the bottom or has to be pumped before braking
effect is achieved, it may be due to a lack of hydraulic fluid.
Use the correct type if topping up. Possibly MIL-H-5606, which is the most
commonly used hydraulic fluid.
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8.3.6 The aircraft's axes and primary control surfaces
There are 3 fixed axes throughout the aircraft that follow the aircraft in its
maneuvers.
They are:
- The longitudinal axis
- The lateral axis
- The normal axis (vertical
axis)
Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 691
