 INTERNAL
BRACING
Now that the outer wooden frame has been modeled, it is time to add the
vertical wooden braces. Review your plans, and notice that the fuselage is
separated into a number of bulkheads (lettered from A to K on the plans I
provided).
These uprights are simple Box primitives, slightly narrower than the wooden
frame itself, and the length and position placed by eye along the fuselage (SCREENSHOT).
Add all the braces along one side only, you can mirror them later.
Once all the uprights are placed, group them together with the outer frame.
To mirror the
group, I edit the pivot point to be in the center line (SCREENSHOT),
so that when you use the Tools>Mirror command, the new group is already in the
proper position (SCREENSHOT).
CROSS BRACING
The method for the cross braces is similar to that above, except the top and
bottom are not mirror images of each other (though the lengths are the same,
and we will copy the top braces downward to save time).
 Lay in all the top braces (check with the plan for rough position, but align
them with the actual upright braces you've already placed) (SCREENSHOT).
Carefully control the lengths so that the ends don't stick out through the
framework (SCREENSHOT),
since we will be skinning the fuselage later and we don't want bits
sticking out through the outer surface.
Once the upper cross braces are finished (SCREENSHOT),
select them all, copy them downward (move them along the Z axis while holding
down the Shift key). Make sure to choose the Copy option (SCREENSHOT),
not the Instance or Reference options.
Select each lower cross brace in turn, and move them upward into position. Be
careful to restrict any movement to the Z-axis only, and they should slide right
into place (SCREENSHOT).
Group them all together, and this section is ready.
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