"Cloudster" Construction Project Session #12
As I reported previously, the Jim Adams plan of
the Cloudster does not show the stab ribs as does the Cleveland plan so I
went to the copy center and had a copy of the Cleveland plan made reduced by
the 0.923 scale factor. This provided the stab rib patterns, which I cut out
as shown below.
However, these patterns leave a little bit to be
desired in their fit. So I used them as a guide to cut out stab ribs that
actually fit properly. I made the height of each rib's LE 3/16" so it would
butt into the LE full height. I also made the height of each rib's TE 1/8"
because the 3/16" TE pieces must be trimmed down to 1/8". The resulting
1/16" rib parts are shown below.
Then the ribs (E2, E3, E4, E5, and E6) were
traced onto a sheet of quadrille paper to come up with the correct rib
patterns as shown below.
The center section of the stab is being modified
in order make the stab removable from the fuselage. This is accomplished
with two 1/32" plywood stab plates shown below. As you can see, two 1/8"
plywood squares are glued to the stab plates and threaded with a 2-56 tap.
The lay up of the stab structure is shown below.
Notice how the two stab 1/32" plywood plates are integrated into the center
section on the bottom of the stab.
This is a close up of the stab center section and
there are two things to observe: (1) the wedge doubler that reinforces the
leading edge joint and (2) the two 3/32" ribs that form the 3/16" slot on
the stab's center line for the vertical tail's removable fin. The top and
bottom of the center section will be planked with 1/32" sheet balsa a little
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