L-1011 Flight Controls: Surfaces (27-4-8)

The L-1011 has a Flap with a Vain.

There are four panels on each wing of the L-1011 that make up the trailing edge flap system. These flaps are powered by hydraulic motors through torque tubes and ball actuators. 

The secondary Flight Controls are composed of the four double-slotted fowler-type flaps and the seven slats on each wing. 

Above is the Flying Stabilizer used on the L-1011 which is mechanically slaved to the elevator.

L-1011 General Aircraft Characteristics: Control Surfaces (25-4)

The primary flight control system includes controls for the horizontal stabilizer, rudder, ailerons, and the spoilers. Conventional control wheels, columns and rudder pedals are provided in the flight station for the Captain and First Officer. These controls are linked to (and govern) hydraulic actuators which determine the positioning of hydraulic servos. Thus the control surfaces are fully powered by the hydraulic system. The L-1011 has a flying stabilizer and slaved elevator. Other flight controls include the ailerons and spoilers. Both the inboard and outboard ailerons are full time ailerons. The spoilers, in addition to being speed brakes, are used in a Direct Lift Control System (DLC). The DLC is used in approach to Landing and modulates the spoilers, changing wing lift, greatly increases approach and touchdown accuracy.