Flap actuator mechanism

Today I worked on the flap actuating system.  It uses a small servo - electrically operated.  I had been delaying this for a while, because the photo manual and DVD series I use talked about using the wing jig to check for the hinge line of the flap (not yet mounted).  But today I decided that since they have pre-drilled holes for the rear spar attach plate and the flap actuator I will just use them and go ahead.

The pins on the end of these arms fit in slots on the flaps.  As the arm rotates, the pin pushes the flap into the desired position.  These are on a shaft,  but will not be located precisely until the flaps are on and calibrated.

The arms are connected to the shaft, which is held in place by two aluminum bearings made from angle extrusion.

This is the bearing on the passenger side.  The shaft has a collar welded to it and a stainless washer provides a thrust bearing to protect the aluminum bearing.

Here is the bearing on the pilot side.  The crank arm is shown, and the extension from the actuator attached to the crank.

Here is the rest of the actuator.  This was a knuckle buster to screw in.

Above is shown the plastic bearing for the nose gear, and the attachment rods for the nose gear steering.