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This is the router pattern used to cut the rib webs and the assembly
fixture used to assemble the rib parts. The router pattern has 18 gauge nails driven
in and cut off leaving 1/8 inch protruding. It also has register pins. The
nails serve to hold the material in place while it is being routed and the register pins
locate the material on the pattern.
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| These are the patterns used to lay out the rib pieces on the material being used for
the webs. |
The patterns have been used to layout the rib pieces on the material, in this case
7/32 plywood. Keep about 1/4 inch between parts so that when sawn out there will be
about 1/8 inch outside the lines. |
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| Web material after being jig-sawed out. |
For drilling the register pin holes stack several pieces with the pattern on
top. Clamp and drill the holes on a drill press |
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| Place the material pieces on the router pattern aligning with the register pins.
Tap lightly with a mallet so that the material lies flat and on the cut off nails. |
A better view of the router pattern. Cut off nails and register pins are
visible. |
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Routing a web. I used a 1/2 inch edge trimming
bit. |
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| Routing the lightening holes with a plunge bit. The bit used on the outside can
be used if a hole is cut so that it can be introduced. |
A piece of the web after routing. |

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These half moons are where the stringers will go when the wing is
assembled. Before the ribs are assembled these will have to be deepened and squared. |
Deepening the stringer slot with a file. |

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Grooving the cap strips on a table mounted routed. Groove will
fit on the rib webs and should be 1/16 inch or so deep. Just enough to hold the cap
strip in place while it is being glued and nailed. |
After steaming the cap strips place in a form to bend the forward
portion. Half of the strips are put in the form with the groove up and half with the
groove down. |

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Keep a vacuum handy to clean up the router chips. |
With the web pieces in place on the assembly fixture apply glue to the
caps and clamp in place. The edge of the assembly fixture is relieved slightly to
give room for the cap strips. |
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| While nailing the cap strings with 20 ga. nails provide some backup. I am using
a riveting bucking bar. |
The rib noses have to be tripled for the screws used to attach the metal leading
edge. Using some scrap rout extra noses. |
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| Put a tripler on each side of the nose and glue in place using the register pin hole
to align with a piece of dowel. |
After assembling the wing glue a short piece on the web between ther stringers. |
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The finished rib. |