Friday October 22nd, 2004|
Fuel Pickup Anti-Rotation Brackets; More Prep
Today was a big day on the project. The tank is pretty much ready to start riveting. I hope to start riveting the stiffeners tomorrow.
I started out today by making the fuel pickup anti-rotation brackets. You get two, 2-inch long pieces of stock from which to make these things. Here they are after I cut them down with my band saw.
Then I drilled the requisite holes. I drilled one rivet hole, then clecoed the bracket to the access plate and used the pre-punched access plate holes to drill the other hole. This way I know it lines up.
Then I pulled out my big heavy c-frame table top.
And a few thousand strikes with a dead blow hammer....
And this is what you end up with. Dimpling both tank skins took HOURS. I had borrowed a tank dimple die set from a fellow builder who is now into his finishing kit. With about 15 holes left, the die decided to...hmm....ie. The little 3/32 'nipple' on the male die broked off. Oh well...guess I owe someone $30.00!
Then you have to score the mating surfaces where any two pieces meets. This includes the skins, stiffeners, ribs, filler flange..etc. I decided to use this nylong brush for scoring the various surfaces.
Here's the nylon brush mounted in my electric drill. I preferred using the electric drill for this since it's heavier and helps you keep a steadier hand which scuffing surfaces.
Jaime got this picture of me going along with the drill. What I do is offset the drill to 45 degrees and go along an entire row of rivets. Then I rotate the drill 90 degrees and score in that direction....
Here you can see the rivet lines close up. This aids adhesion of the tank sealant to the mating surfaces.
And here's the inside of both tank skins.
I later mounted the nylon brush in my drill press to do the other various parts.
And here you see a stiffener all scuffed up and ready to be cleaned. I also did this to all the ribs. Boy, today was a long day working on the project without very much to show for it....but that's fine. Tomorrow I hope to start having some fun with ProSeal!