Hello again everyone,
I'm going to show how I make a jig starting with the fuselage with this posting.
The first thing is to take the side view and mark the thrust line.
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Then measure to the lowest point.
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Use the measurement and put a dot on the right and left sides of the paper to create the bottom line. This bottom line will be the sheet the fuselage jig parts will be glued to.
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Check everything with the fuselage and mark where the first line meets the front and back of the fuselage with a marker.
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Here's the glass for the lazy susan with a .010 sheet of styrene taped to it. The fuselage top view was cut out and taped to the sheet.
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Now I need the front marked off with a level line. Mark across the top left hand side of the ruler..................................
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Use the straight edge to finish the right side of the line......
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On the side view, mark from the point where the fuselage meets the first line to the bow front and do the same for the aft end. The distance is marked with a red "X".
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Now on the top view, measure the distance back fron the front end and back end....
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Here's the same side view distances (fore and aft) marked with an "X" onto the top view.................
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Normally I would use basswood for the jig but I only have balsa on hand right now.
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Cut out a measured square....................
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Check the edges and sand for the correct width and height if necessary..................
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Glue it down..................
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The fuselage is a little short so I need to put a few shims under the nose and add a bumper for the nose to touch.
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Here's how it looks from above............................
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Add a few more balsa squares to the front and back of the fuselage to keep it from wiggling and there you have it.
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Now the fuselage is very secure on the jig and won't move while I'm fitting and adjusting the wings.
-Mark