23 January 2009
Started Trim Tab

3.5 hours

Roughing trim tab skin for ribs
Roughing trim tab skin for ribs (Full size)

The trim tab skin is roughed up with 150 grit sandpaper where the foam ribs are located

Match drilling, dimpling trim tab horns
Match drilling, dimpling trim tab horns (Full size)

Fitted the two trim tab control horns to the skin, match drilled then dimpled them

Priming skin and trim tab horns
Priming skin and trim tab horns (Full size)

Primed the skin and horns. The garage temperature was 32, so I moved the parts and the paint into the house to warm them up before doing the priming. Worked ok.

Riveted horns to skin
Riveted horns to skin (Full size)

I next riveted the horns to the skin. Turned out to be a mistake, as I can't bend the ends of the skin with the horns on, so I had to drill out the rivets.

Bending ends of trim tab skin
Bending ends of trim tab skin (Full size)

Sawed out a bend form block from a small piece of oak. Then I clamped the skin and bent the ends of the skin to form the end ribs. It came out ok.

Match drilling spar and skin
Match drilling spar and skin (Full size)

Cleco'd on the trim tab spar and match drilled the holes. Next I drilled the holes in the ends of the trim tab where I just bent the tabs.


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