Page 709 - PPL-engelsk 2025
P. 709
Aircraft general knowledge
After full refueling, the aircraft must not lean to the left, because then fuel will
flow out of the vent pipe, and in one night you can lose 15 liters or more!
The normal position is BOTH, and during take-off and landing the selector must
be in this position.
During flight, the selector can be set to L or R if there is an imbalance between
the tank contents.
Fuel selectors come in many versions.
Some selectors have 2 positions, one for
the right and one for the left tank.
There may be a middle position, which can
be either OFF or BOTH.
Some may have 4 positions: Left (L), Right (R), Both and Off.
When the selector is in Both, you can consider the 2 tanks as “connected tanks”.
The special thing about this is that the fuel level in such tanks will be the same
height in relation to the MSL and parallel to the MSL. This means that if the
selector is in Both and you fill up one tank, fuel will flow to the other tank.
The normal position is BOTH, and during takeoff and landing, the selector must
be in this position. During flight, the selector can be set to L or R if there is an
imbalance between the tank contents.
8.5.3.4 Practical use of fuel systems
1) We start by taxiing driving the aircraft to the refueling facility.
2) The aircraft is connected to the refueling facility / tanker with a ground
connection so that there is no voltage difference between them.
Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 709
