This is on an experimental. I spent a lot of time looking for pictures of stringers and there are very few available. I found a post that defined one person's placement of a belly stringer on a J3. It made sense so here are pictures of my aluminum belly stringer that has doubled reinforcement tape between the stringer and any 4130 tubing. The safety wire holding the stringer in place is also padded with reinforcement tape.
The first picture is with the fuselage upside down and taken from the rear. I left the end of the stringer higher than the external profile of the fuselage. This was intentional to make an opening at the stringer for drainage. This should be about the lowest point of the stringer.
The second picture is how I relieved the body of the stringer to make a more acute bend than it would make without the relief.
The third picture is where the stringer ended at the boot cowl end of the plane.
Hope this helps someone. I sure had difficulty finding photos and a description of the bottom stringer that is not there on the OEM plane but recommended to help drain the fuselage and prevent corrosion of the tubing.
The first picture is with the fuselage upside down and taken from the rear. I left the end of the stringer higher than the external profile of the fuselage. This was intentional to make an opening at the stringer for drainage. This should be about the lowest point of the stringer.
The second picture is how I relieved the body of the stringer to make a more acute bend than it would make without the relief.
The third picture is where the stringer ended at the boot cowl end of the plane.
Hope this helps someone. I sure had difficulty finding photos and a description of the bottom stringer that is not there on the OEM plane but recommended to help drain the fuselage and prevent corrosion of the tubing.
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