RV-9A: Other Bulkheads & Longerons - 6/28/2008
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 Started working on the F-711 Bulkhead
I started off by fluting the flanges of the F-711A and F-711B bulkhead halves to make them sit flat on the work bench top. Then it came time for the F-711 C bars. These guys were real head-scratchers, trying to figure out exactly where to drill the holes and how long to make the bars. Then there is nose-dragger version and a tail-dragger version on the drawing to figure into the mix. So rather than try to cut these guys exactly to length, I decided to just cut the bar provided in half, which left the 2 pieces about 1/4 of inch too long. That way, I would have some left over to work with, rather than have the damn things too short. Then I drilled one hole in the ends of the bars and clecoed them to the A/B bulkheads. Then all I had to do was drill the other holes useing the A/B bulkheads as a drill guide.
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 Finished the F-711 C Bars
I feel like need to go to a "bar" after fabricating the dudes. I made the final cut on the length of the bars using the measurement on the drawing form the top of the A/B bulkhead to the ends of the F-711 C bars, while they were still clecoed to the bulkheads. Then I trimmed all the excess material off as shown in the plans.
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 Made the F-711 C angle
This piece is made now but not riveted on the F-711 bulkhead.
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 Done!
The pneumatic rivet squeezer made quick work of this session.
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 Picky, picky, picky
I hate to pick on the drawings, buuuuuuuut....
This side view drawing of the F-711 doesn't match the actual parts. The F-711A on the left doesn't have rounded edges on the flanges, the F-711B on the right actually does (and vicey vercey). I really freaked out when I compare my riveted bulkhead to this drawing. Then when I saw that the pre-drilled holes on the left bulkhead matched my pre-drilled holes on the left bulkhead, I decided that the drawing was mis-drawn. Phewwww!!
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 Here's how the drawing should have looked
Notice that the predrilled holes match the drawing and the "angle up" of both bottom flanges also match the drawing.
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