After a frustrating few days and many hours of wasted work, I decided to chunk my previous attempt at fabricating that lower section of the tailgunner's station that you saw on an earlier post and start over. I started with making a new buck for the project. This time, slowing down and doing it right. Things went fairly well, and I was able to fabricate the first difficult piece of aluminum for this project.
I started with cutting out the profile I wanted out of foam board, then transferred it to 1/4" plywood and cut it out. I started assembling this mess with a hot glue gun and wood blocks to hold everything square...
Here is the finished buck...
The next step was to cut out a reasonably close shape to the first piece of the puzzle out of posterboard. This will be the pattern I cut the aluminum sheet out of. The wrinkles on the ends are areas that will need to be shrunk, while the pucker in the center is the area that I will have to stretch...
Let the hammering begin! A lot of pinned up anger and frustration was taken out on this step...
This stuff takes patience and a lot of going back and forth from the hammer & shot bag, to the post dolly, and eventually to the English wheel. If you get in a hurry, you might as well just go ahead and throw your metal in the trash...
For me, the English wheeling starts only after I have gotten the general shape done with the hammer and shot bag. Initially, the wheel is only used to smooth out the rough spots, but is used towards the end of the project to gradually bring the final touches into the piece...
Getting close...
I think this will work for now. There may be some fine tuning once I get the other pieces of the puzzle built though...
Gary