20
Рис. 4. Principal maneuvers of the aircraft:
1
-
pitching motion -
движение тангажа;
2
-
lateral axis -
поперечная ось;
3
-
yawing motion -
движение рыскания;
4
-
vertical axis-
вертикальная ось;
5
-
longitudinal axis-
продольная ось;
6
-
rolling motion -
движение крена
Spoilers
are for the purpose of decreasing wing lift. They are long narrow surs,
hinged at their leading edges to the upper sur of the wings.
Speed brakes
are hinged surs used for slowing down the speed of an acft and
attached to the wings. On some acft they are hinged to the lower sur of the fus.
Slats
are movable control surs attached to the leading edges of the wings.
When the slat is extended forward, a slot is created between the slat and the leading
edge. At low airspeeds this increases lift and improves handling chars.
Landing Gear
The landing gear or undercarriage of an acft consists of main and auxiliary
units. The
main landing gear
contains two
landing gear units
, one under each side
of the fus or one under each wing. The
aux unit
is located either under the tail or the
nose of the acft.
A typical landing gear consists of three
retractable landing gear assemblies
.
Each main landing gear is equipped with a conventional
air-oil shock strut
, a
wheel
brake assembly
, and a
wheel and tire assembly
. The nose landing gear is equipped
with a conventional air-oil shock strut, a
shimmy damper
, and a wheel and tire
assembly.
2.4. EXERCISES
1. Ответьте на вопросы.
1.
What are the principal structural units of an aircraft?
2.
What structural units are attached to the fuselage?
3.
What is the construction of an aircraft wing?
4.
What does a complete wing assembly consist of?
5.
What are flight control surfaces designed for?
6.
What groups are flight control surfaces divided into?
7.
What flight control surfaces belong to the primary group?
2
3
1
5
6
4
