Descrizione Generale
A. Spoilers are provided on the upper surface of each wing to perform the following functions:
(1) Assist the ailerons in lateral control.
(2) Reduce speed during flight.
(3) Supplement the flaps in increasing drag to spoil lift and increase braking efficiency during the
landing roll.
B. The spoiler system consists of the spoiler panels, lateral control mixers, spoiler actuators, control
valves, speedbrake control lever, control box, automatic actuator, spoiler switch and phase interlock
relay box.
C. The spoiler mechanical system controls the movement of the spoiler panels to supplement the
ailerons in lateral control of the airplane, or to act as a speedbrake. When used as an aid to lateral
control, the system extends the spoiler panels on one wing to a maximum of approximately 60
degrees from the faired position, while maintaining the panels on the opposite wing in retracted
position. When used as a speedbrake, the system extends the panels on both wings simultaneously,
up to a maximum of approximately 35 degrees from faired position. If both functions are used at the
same time, the panel movement induced for lateral control is added to the panel movement induced
for speedbrake function up to a total of 60 degrees.
D. The spoiler automatic system is an electrically controlled, hydraulically actuated system, used to
reduce lift and increase drag for more effective braking during the landing roll or rejected takeoff roll.
With the speedbrake lever set in the armed position the spoilers will automatically extend when the
main landing gear wheels spin up on landing, or the lever may be operated manually to extend the
spoilers. With the speedbrake lever armed during takeoff the spoilers will automatically extend when
both thrust levers are raised to reverse thrust position. In each case all spoilers on each wing are
fully extended simultaneously.
E. On later aircraft, an in-flight spoiler lockout mechanism is installed to prevent manual movement of
the speed brake lever in flight when the flaps are extended eight degrees or greater. The auto spoiler
actuator provides the primary unlocking input and automatic speed brake lever deployment upon
main wheel spin-up at touchdown. Compression of the nose landing gear (NLG) strut provides a
secondary mechanical unlocking input. A weight-on-wheels (WOW) unlocking input has been
incorporated into the MD-80 in-flight spoiler lockout system to provide manual ground spoiler
deployment capability at touchdown in the event the main landing gear (MLG) wheel spin-up
unlocking and automatic deployment feature does not function.
F. The spoiler automatic system is an electrically controlled, hydraulically actuated system, used to
reduce lift and increase drag for more effective braking during the landing roll. With the speedbrake
lever set in the armed position the spoilers will automatically extend when the main landing gear
wheels spin up on landing, or the lever may be operated manually to extend the spoilers.
P.S.
Se avete necessità della traduzione, lo farò!!!
Saluti
Francesco
e magari postale gli skemi in un formato più piccolo, per vederli così ci vuole un monitor 12000 pollici 
