Monday May 30th, 2005|
Finished Drilling/Started Deburring Center Fuselage
Yesterday we had planned to fly out to the west side of the state to visit my folks for a family reunion but the weather meant we would be driving. Anyway...this morning I went out and started drilling the side ribs to the center fuselage.
The side ribs have a couple of joint plates that help transfer load from the rib to the bulkheads. Here's the aft one.
...And here's the first one. This is really goofy...this piece is definately close to the rivet hole you see there. Obviously something will have to be done here for this to work. I may notch out an area of the plate for the rivet or I may just make one a little bigger...but this thing is definately to plans...the plans even show this plate right beside the rivet hole. Whatever.
The plans have you 'scallop' the flanges of the side ribs for the step tubes to fit in there...but the plans don't give you any dimensions for this.
Here you can see where the flanges need to get cut down. I'm thinking that I'm just going to do this after I fit and cut the side skins. I don't think it's important to get the scallop perfect...just close.
Then I paird the two halfs together and drilled the flanges. I'm not going to drill the side doublers yet...I just don't see the point. The side skins have to get drilled to this too...so why drill the doublers now when I'm going to drill them again??
...and here's the 705 carry through...this is looking at the aft side. You can see where the flanges of the baggage ribs and the flanges of the seat ribs need to get cut out for the snap bushings that will go there. Don't ask me how I did this...it's a sucky process....but obviously doable.
Then I removed the center bottom skin and deburred it (boy..there are a MILLION holes in that thing) and started dimpling.