{"id":1090,"date":"2009-12-27T17:18:12","date_gmt":"2009-12-27T17:18:12","guid":{"rendered":""},"modified":"2017-12-04T05:12:24","modified_gmt":"2017-12-04T05:12:24","slug":"finished-prepping-center-secti","status":"publish","type":"post","link":"http:\/\/jasonbeaver.com\/rv7\/2009\/12\/27\/finished-prepping-center-secti\/","title":{"rendered":"Finished Prepping Center Section"},"content":{"rendered":"

I started today by installing the crotch strap brackets. \u00a0I’m either going with Hooker or Crow harnesses, but either way, the spacing between the brackets has to be increased to 5\/16″ (instead of the stock 1\/8″ spacing). \u00a0Mike Bullock already determined the best way to accomplish this and documented it here<\/a>, so I’m just going to copy his method (thanks Mike). \u00a0I put a center line that is aligned with middle nutplate, then measured 7\/32″ forward and 3\/32″ aft of this line and put additional marks.<\/p>\n

<\/a><\/center><\/p>\n

The front side of the bracket is positioned with the web flush with the forward line and drilled to the adjacent ribs.<\/p>\n

<\/a><\/center><\/p>\n

Instead of cutting a 5\/16″ spacer, I just used a couple of AN5 bolts which are 5\/16″ in diameter. \u00a0I taped them in place and clamped the aft side of the bracket against the bolts and against the seat pan, then drilled the bracket to the adjacent ribs.<\/p>\n

<\/a><\/center><\/p>\n

The prepunched holes in the seat pan need to be drilled to #19 for #8 screws.<\/p>\n

<\/a><\/center><\/p>\n

Here is the backside, showing good edge distance on the #19 holes.<\/p>\n

<\/a><\/center><\/p>\n

After repeating the process for the right bracket, I finished up a few remaining tasks such as drilling the seat ribs to the aft side of F-704, match drilling all ribs to bulkheads, and drilling out the forward tooling holes to 5\/8″ for wiring runs. \u00a0I then\u00a0disassembled the center section and started prepping the individual components.<\/p>\n

First up is to debur and dimple the holes in the bottom flanges of F-704. \u00a0Remember that the holes we countersunk in the bottom skin have to be skipped when dimpling so that the floor stiffeners can lay flush against this flange.<\/p>\n

<\/a><\/center><\/p>\n

Neither the instructions nor the plans make any mention of these holes in the top flange of the aft side of F-704, but the seat pan that sits above this is removable, so this must just attach the top of the seat ribs to the F-704 flange. \u00a0Since the seat pan needs to sit flush against this flange, I countersunk this for an AN426AD3 rivet.<\/p>\n

<\/a><\/center><\/p>\n

Finally, I started deburring all of the components. \u00a0I made it through the F-704 and F-705 bulkheads and six of the eight seat ribs before running out of steam. \u00a0I should be able to finish deburring the rest of the center section components tomorrow.<\/p>\n","protected":false},"excerpt":{"rendered":"

I started today by installing the crotch strap brackets. \u00a0I’m either going with Hooker or Crow harnesses, but either way, the spacing between the brackets has to be increased to 5\/16″ (instead of the stock 1\/8″ spacing). \u00a0Mike Bullock already determined the best way to accomplish this and documented it here, so I’m just going … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1090","post","type-post","status-publish","format-standard","hentry","category-fuselage"],"_links":{"self":[{"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/posts\/1090","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/comments?post=1090"}],"version-history":[{"count":2,"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/posts\/1090\/revisions"}],"predecessor-version":[{"id":2782,"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/posts\/1090\/revisions\/2782"}],"wp:attachment":[{"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/media?parent=1090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/categories?post=1090"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jasonbeaver.com\/rv7\/wp-json\/wp\/v2\/tags?post=1090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}