{"id":380,"date":"2012-09-18T21:23:40","date_gmt":"2012-09-19T01:23:40","guid":{"rendered":"http:\/\/rogermann.org\/ragwing\/?page_id=380"},"modified":"2012-09-18T21:25:31","modified_gmt":"2012-09-19T01:25:31","slug":"rib-jig","status":"publish","type":"page","link":"http:\/\/rogermann.org\/ragwing\/support\/rib-jig\/","title":{"rendered":"Jim Dalen’s Rib Jig"},"content":{"rendered":"
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\nJim Dalen’s Rib Jig<\/strong><\/span><\/p>\n

Jim Dalen, a RagWing Parasol builder sent us a copy of an article he wrote for his
\nlocal UL club (the Albuquerque Ultralight Association) newsletter. <\/span><\/p>\n

\"Jim<\/p>\n

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Constructing the wing ribs is still the primary focus in my garage
\nand I’ve taken some photos of the jig and the assembly process that
\nmight assist another builder. I made the jig from an old section of
\npreformed countertop. After trimming the excess material, I ended up
\nwith a flat section that is about 16″ X 50″. Nailing and gluing a 1.5″
\nstrip along a factory straight edge at the “wrong side” provided a
\nperfect 90 degree and straight corner from which to construct the ribs.
\nA full size rib pattern was then attached to the particle board with
\nwall paper paste after all key measurements were verified on the
\npattern. I started to construct a cam arrangement for alignment during
\nthe rib construction, but found that 8d finishing nails placed into
\npredrilled 7\/64″ holes held the pieces firmly and uniformly in place for
\ngluing. This jig uses 22 of these “pegs”. The proper placement of the
\nholes was determined by actual placement and bending of the wood strips.
\n“See photo # 1). The rib is assembled in the jig by 1st placing the
\nlower and upper stock in place, fitting and gluing the trailing edge
\njoint and then fitting, cutting and gluing the remaining stock pieces.
\nThe plans of the Parasol call for the joints in the ribs to just be left
\nat a 90 degree cut and to rely on the gussets to support the stress at
\nthe joints. I am not comfortable with the resulting gaps so all of the
\njoints are fit and cut to the proper angel by simply laying the stock
\nover the existing upper and lower stock at the correct angle as
\ndetermined by the plans, marking the correct dimension and angle with a
\nfine lead mechanical pencil and cutting with a hacksaw. (Photo #2 shows
\nthe fine fit possible by using this technique and also illustrated the
\npositing of the stock by use of the finishing nail pegs.)<\/p>\n

\"Jig<\/p>\n

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After all the stock is glued, the gussets are cut and glued in place.
\nI am using the EXCEL glue recommended by Rag Wing and find that it
\nexpands as it dries. The plans for the craft call for use of staples to
\nsecure the gussets until they are dry but I use wood clothes pins to
\nclamp each gusset in one or two places. Half of the clothes pin was
\nshorted to just less than the spring slot and then permanently screwed
\nin place. After the gusset is cut and glue applied, the top half is
\nsimply slipped under the center spring and then acts as a clamp while
\nthe glue dries. (See photo #3 and compare the clamps to photo #2.)<\/p>\n

\"Joint<\/p>\n

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This jig setup works well for me and the only problem encountered was
\nanother case of pilot error when I didn’t get the waxed paper positioned
\ncorrectly and glued a peg to the wood stock! That little error proved
\nthe exceptional adhesive qualities of EXCEL glue.<\/p><\/blockquote>\n

\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Jim Dalen’s Rib Jig Jim Dalen, a RagWing Parasol builder sent us a copy of an article he wrote for his local UL club (the Albuquerque Ultralight Association) newsletter.             Constructing the wing ribs is …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":23,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/pages\/380"}],"collection":[{"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/comments?post=380"}],"version-history":[{"count":6,"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/pages\/380\/revisions"}],"predecessor-version":[{"id":389,"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/pages\/380\/revisions\/389"}],"up":[{"embeddable":true,"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/pages\/23"}],"wp:attachment":[{"href":"http:\/\/rogermann.org\/ragwing\/wp-json\/wp\/v2\/media?parent=380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}