![\"IMGP3642\"](\"https:\/\/rv10.mirimar.org\/wp-content\/uploads\/2013\/12\/IMGP3642.jpg\")
<\/a> The first steps involved countersinking nut plate fastener holes on the Rudder Horn.\u00a0 This is a crucial part of the airplane steerage mechanism as the rudder control cables will attach here.\u00a0 Countersinking this side with a micro-stop countersink cage was easy, the backside not so.<\/p>\n<\/p>\n
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<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" All the steps for 7.4 and 7.5 were completed today, along with 7.6.1 and 7.6.2. This means all the rudder framework parts (spar, horn, ribs, stiffeners) have been drilled, countersunk, and deburred ready for corrosion prep.\u00a0 It took about 5 hours to get this done. The first steps involved countersinking nut plate fastener holes on …<\/span> Continue Reading →<\/span><\/a><\/span><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-443","post","type-post","status-publish","format-standard","hentry","category-section-7-rudder"],"_links":{"self":[{"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=\/wp\/v2\/posts\/443","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=443"}],"version-history":[{"count":10,"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=\/wp\/v2\/posts\/443\/revisions"}],"predecessor-version":[{"id":473,"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=\/wp\/v2\/posts\/443\/revisions\/473"}],"wp:attachment":[{"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rv10.mirimar.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a>the back part of the horn piece is rounded, meaning the countersink cage cannot be aligned perpendicular to the surface and parallel to the hole.\u00a0 As a result, hand countersinking was required.<\/p>\n<\/a>Voila.\u00a0 Using a hand crank attached to the #30 countersink bit, I was able to get the proper alignment.\u00a0 It took a while longer to hand-bore out the metal, but actually I liked the control.\u00a0 The appropriate flush rivet was continually used to check the depth, which in my opinion turned out quite nice.<\/p>\n<\/a>Next was drill out the lower spar rib and corresponding flange part to match the attachment points to the horn.<\/p>\n<\/a>The striker plates were also countersunk by hand.\u00a0 These will eventually be flush riveted to the lower rudder spar.\u00a0 They serve as the contact points for the rudder stops prepared in Section 6 for the vertical stabilizer.<\/p>\n<\/a>Horn, striker plates, lower rib and spar clecoed together after match drilling and deburring.<\/p>\n<\/a>Stiffeners attached to the rudder spar.<\/p>\n<\/a>One rudder skin clecoed in place for stability.\u00a0 Next steps will be debur the other skin and peel vinyl strips off the exterior surface along the rivet lines.<\/p>\n