User Manual

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58. Mark the locations of Formers F-2 and
F-3 on the triangular stock because the
doubler will cover up the location lines.
59. Fit the die-cut plywood doublers into
place. Sand wherever necessary to
make them sit in the proper location.
Leave the black line of the wing saddle
area --- don't cover it with the doubler.
CAUTION
Do not glue the plywood doublers, on with Sig Bond, Tite Bond, Elmer's white glue or any other adhesive
that has a water base. Water base glue will cause the doublers and sides to curl because of the large area
being glued.
The doublers on the prototype were
glued in place with Sig Kwik-Set five
minute epoxy. Work quickly, spread a
thin film of glue over the entire doubler,
put in place and press down with your
hands while it is setting up. Do not take
it from the building board immediately
after setup. Five-minute epoxy sets up
quickly but doesn't fully cure for some
hours. During this time it can warp. Put
some heavy weights on the doublers
and leave them overnight if possible.
Some builders prefer contact cement to
install doublers. The main consideration
here is to prepare guides beforehand
with pins placed so they will steer the
doubler onto the exact required spot, for
once the glue on each surface makes
contact, the doubler cannot be moved.
Another aid makes contact, the doubler
cannot be moved. Another aid is to cut
a piece of wax paper to cover the glue
on the side and slip it out when the
doubler is in place. Press the parts
firmly together.
60. Cut the completed sides from the sheet.
61.
a. Mark the positions of F-2 and F-
3 on the plywood doublers.
b. NOTE: It occurred to us after
doing the photo sequence that
the notching of the bottom
triangular stock to pass F-1B
could more easily be done at this
point. Look ahead to picture No.
72 and you may agree and want
to do the notches now.
c. Cut pieces of triangular stock for
the fuselage front. Allow 3/32"
back from the front edge to
accomodate F-
1B. DO NOT glue
these pieces in at this time. Put
them aside for later use after the
firewall has been glued on.