Miatav8,MstrASE,A&P,F wrote:
Easier way, though holding the outer boards during setup is awkward. Screw straps (cut from old blue jeans?) with 1/2" deck screws to the lower boards then screw those straps to the upper boards already clamped in place. Good ratchet strap sets can be found at home depot or lowes along with the threaded rod described below.
If the overhang of the skin over the buck is a lot, add a 2x4 to the end of the buck then add the angle iron to the 2x4. You can also drill the angle iron and use a long threaded 1/2" rod instead of clamps, plus the rod can't slip like a c clamp can.
If you bend it a little too far, it is easier to spread it than it was to bend it.
I thought it was a typo about 3004, thinking it was 3003 but either is fine. 3004 may have a harder heat treatment. You can anneal the bend area but it would take a long time with a bottle torch but safe. A rose bud on oxy actylene is highly effective but can quickly ruin a panel without experience.
It is a typo it’s 3003. Any way I did this. I have a lot of clamps and 2 ratchet straps. When you sinch it up tight that’s just making it tight. As soon as you let the straps go it’s all back where you started. I have the buck cut for over bend too especially in the front my nose cone comes in to meet the frame a little. If I don’t get it today it’s going by my buddy tomorrow on the English wheel. That will bring it in.