Tuesday August 9th, 2005|
More Fuse Riveting
Ok, so if you're a builder, you may have noticed the problem I discovered yesterday. The undimpled rivet you see there should have been drilled out to #12 and countersunk. I looked at the plans and thought that it was going to get a bolt....which would mean no countersink...so I just left the hole untouched.
Here you can see the drawing detail of the area in question. You can see that the longeron at the bottom gets the countersunk screw. Remember that this drawing show the fuselage upright, but the fuselage is currently upside down.
Ok, so in order to countersink the lower longeron I need to remove it. These bolts are the only thing holding it in...so I removed the bolts and tossed the nuts into my 'do not use' pile (I use these nuts to temporarily hold things together).
An astute observer will note that the hole has now been enlarged.
Here you can see how I dimpled it. I couldn't remove the skin since I've already riveted everything in site to it...but you get the idea. This thing is from the C-frame tool and fits the rivet gun. I just used the dimple in the lower longeron as the 'female' die and drove the male die into it with the rivet gun. Very simple...and worked like a champ.
Here you can see the skin dimpled. I then went over and did the other side, but there's no need to post that here. Everything is now ready for the forward bottom skin to go on. Just need to prime the mating surfaces on the center skin.