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8/19/15 20 hours.
This is page 8-19 constructing the cabin frame, I skipped all the wing attachment stuff till in hangar.

So I finished, well to the point of starting to rivet together, the f-631 cabin frame. This serves as both a rollover protection bar and a joint between the fixed back window and the tip up front portion of the canopy. And discovered I had screwed some measurements up, enough so that a redo was justified. I received all the parts upon my return from a five day work trip, and attacked it yesterday. Labeled pictures follow.

Clamped to table for measuring

In vise, mark one side, match it to the other side and start drilling size 40 holes (enlarged to 30 later)

Now for front half tomorrow, then I'll enlarge all the holes to size 30 for ad-4 rivets, prime and prep and such.


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