As I am riveting the center section fuselage to the forward fuselage the bottom skins will overlap. When I rivet the forward bottom skins to the center bottom skin and the center section bulkhead it calls for seven places of double flush. I assume double flush rivets. What does that mean.
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Double flush
- Thread starter dspender
- Start date
This means that both sides should be countersunk or dimpled so that both ends of the rivet are essentially flush. On my -9a this is so the gear mount doesn't interfere with those rivet shop heads, may be the same for you. The forward bottom skin is dimpled, and the center bottom skin and spar flange are countersunk to accept that dimple. Then, the inside of the spar flange is also slightly countersunk so that the rivet shop head sits a little more flush. In many cases I believe it doesn't need to be completely flush, so I just lightly countersunk the inside rather than remove a lot of material. Many people on the 7a and 9a noted no clearance issues here even without making them double flush. Obviously the 10 will be different however.
If you have ever done riveted trailing edges, it's the same concept.
Chris
If you have ever done riveted trailing edges, it's the same concept.
Chris
