Finishing and Attaching the Trim Tab

The elevator trim tab must be fitted to the elevator such that the trailing edges of the elevator and trim tab form a single line. Likewise, the inboard edge of the elevator and trim tab should also form a single line. This is done by clamping the piano hinge in place and adjusting the position of the trim tab until everything is aligned. Once aligned, the piano hinge is match drilled to the elevator and trim tab skins. Here’s what it looks like drilled and clecoed into place:

The interior components were then primed and the trim tab riveted together:

Bottom surface of the elevator trim tab
Top surface of the elevator trim tab
Inboard edge of the elevator trim tab
Piano hinge riveted to the elevator

Here’s what the completed elevator trim tab looks like attached to the elevator:

In this build session, I also assembled the access-panel with the trim tab servo mounts:

Here’s what it looks like with the servo on the brackets:

The next task is to set up the servo control of the trim tab to ensure that its range of motion is correct.

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