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F-22 Doubler


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After a nice Holiday break with the Family, I am moving right along on CH 4. Finished the seatback, the IP, and f-28. Did the Forward side of F-22 last night, and I am doing the Aft side tonight.


I have a question about the doubler. In the plans is says "...press the doubler in place, micro the aft face of the doubler, and glass with 2 plies of BID and one ply of UND hoizontally, lapping 1 in. onto previously glassed area (Fig 9)."


Fig 9 shows the glass extending 1 in. below the doubler, but not to the sides. I realize there is only 3/8" off to the sides, but does it not get glassed?


The doubler is held in place then by just the wet glass underneath it and 1 inch of BID overlapping the bottom?


Thanks in advance!



Cozy MKIV #1565 (Chapter 6)

Charlotte, NC

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No glass on the side, it'll be clear when you install F22 on the fuse sides.


Weight the doubler down. Thin strip of peel ply, some release fabric (poly sheeting), a board, then a few weights. I used boxes of nail gun nails. Leave room so you can still squeege out the 1" lap.


I found the bottom edge of the doubler needed to be razor sharp. The top of that angle slightly radiused.



Rick Hall; MK-IV plans #1477; cozy.zggtr.org

Build status: 1-7, bits of 8-9, 10, 14 done! Working on engine/prop/avionics.
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