10 January 2013

FLAPERON CONTROL

As for today, we have done some other parts for the flaperon control section. We have riveted the Linear Actuator Mount (75C1-1) with A5 rivets as shown in the picture. The rivets are checked for consistency.

This is the bottom side of the Linear Actuator Mount. The holes have been riveted to A5 rivets. The assembly is rechecked again for consistency with the drawing and no problem about that.

Then we continue on the Torque Tube Bearing Support Rudder Fairlead (75C4-4). Mr Caleb from Zenith Air has advised us to lay out the two A4 rivets by maintaining minimum edge distance. (refer to email 10/1/2013). So, as it is A4 rivets, so the minimum edge distance should be 4.8 mm. Therefore, we have decided the rivets are 10mm from the edge. And the hole for the Rudder Cable is located at the center of the fairlead.

The Center hole of the fairlead will have #20 size hole, while the Torque Tube Bearing Support will have ¼ inch hole size as its final size.

The Fairlead will also have a cutout following the flange of the Torque Tube Bearing Support.

Then we continue on the second fairlead that will be located on the side of the Torque Tube Bearing Support. The cable hole is designed to be 10 mm from the edge and at the center of the fairlead. Then two other holes is positioned 10 mm from the edges.

Then we continue the operation of the drilling. Rudder Cable Hole on the fairleads are drilled with #40 drill bit. The fairlead is the gripped with red grip pin to the Torque Tube Bearing Support. A clamp is used to hold the fairlead in its position. Then, we drilled through the Torque Tube Bearing Gusset to the Fairlead with #40 drill bit for the 4 A4 rivets. We then enlarged these holes to #30 sizes by using #30 drill sizes. The holes are then gripped with yellow grip pin.

Then the center hole is enlarged to #20 holes size with #20 drill bit through the fairlead and the Torque Tube Bearing Support. Then only the Torque Tube Bearing Support is then enlarged to 3/16” then ¼”.

The center fairlead is then cutted with a hack saw, and filed for sawcut.

The Torque Tube Bearing Support is then primered with zinc chromate on both fairlead position.