Sec 7-3 at Steps 2 & 3: Cleco doublers, rudder control horn and bottom rib onto Rudder spar. Final drill (ie ream) with #40 drill all the 1/8 holes with doublers. Disassemble, then deburr. Took about one hour....mostly due to deburring all the holes and edges.
Onto Sec 7-4 at Steps 1 & 2: prep Rudder skins. Working on Right side first, removing noted edge, and dimpling one hole along top edge. Then Steps 3 - 5 for Left side Rudder skin. Remove small tab, and dimple one hole along top edge also. Deburred both skin along all edges. Long process requiring extra care due to relatively thin aluminum sheet. I used long file for most of the effort, instead of scotchbrite wheel on grinder.
Left skin has flange that overlaps other side at top front, so performed ever so slightly bend edge with roller tool. This minimizes edge rising up and gapping when later riveted.
Note slight difference in reflection along top edge above 3 holes. |
Dimples in rib, countersinks in lead weight |
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