User guide

D D 42. The shape of the leading edge is very
important to the performance of the finished
airplane*. Carve and sand the leading edge to match
the template at the root and tip, and taper it smoothly
from one end to the other *NOTE: If you shape the
leading edge to match the die-cut 1/8" ply LE
Template supplied, this will result in a very stable wing
that will resist tip stalling at high angles of attack For
example, it will be forgiving if you happen to flare a
little too much on the landing approach, and recovery
from spins will be instantaneous On the other hand,
this stability may make the airplane somewhat
sluggish when entering snap and spin maneuvers, and
it may require increased elevator and rudder throws
(and possibly an aft CG location) to perform these
maneuvers If your flying style demands crisp snap
and spin capabilities, you may want to sand the
leading edge to a slightly sharper shape (smaller
radius LE)
To avoid tip stalls, make sure the leading edges
of both wing panels have the same shape.
D D 43 Cut the remaining aileron stock to the
correct length and trim the ends to the correct angles
Now sand the leading edge of the aileron to a "V"-
shape as shown on the plan A razor plane is
especially helpful for rough shaping the aileron leading
edge.
D D 44. Mark the hinge locations on the aileron and
the wing TE. Cut the hinge slots and test fit the
aileron.
D D 45 From the plans, determine the location of
the small nylon control horn on the bottom of the
aileron Hold the control horn in place and mark the
screw locations. Drill 3/32" holes for the screws,
drilling straight down through the aileron (not
perpendicular to the top or bottom surfaces) Harden
the balsa in the area of the control horns (on both
sides of the aileron) by poking several small holes with
a pin, then applying thin CA glue Sand smooth.
Temporarily mount the nylon horn using the 2-56 x
5/8" machine screws and the nylon nutplates.
D 46. Now go back and repeat Steps 2 through 45 to
build the other wing panel.
FINISH INSTALLING RETRACTS
(Skip to next section if using fixed gear)
NOTE: You should allow at least 24 hours from the
time you apply the bottom LE sheeting until you make
the wheel well cutout in the following steps This will
give the balsa sheeting time to assume the new
shape
D 1. Using your previous reference marks and
measurements, cut a hole through the bottom LE
sheeting over each retract mechanism These holes
should be just large enough to allow the gear strut to
be installed with the gear in the extended position.
D 2. Mount a 2-3/4" wheel on each gear strut and
install the struts in the retract mechanisms With the
gear in the "down and locked" position, make sure the
wheels are properly aligned (0-degrees to 1-degree
toe-in) NOTE: You may cut off any excess strut axle
length that protrudes beyond the wheel collar.
D 3 Slowly retract the gear, cutting away the leading
edge sheeting and W-2 rib as required to clear the
strut and wheel as it retracts.
D 4. Re-extend the gear, then enlarge the wheel well
area to 3-1/8" diameter Check frequently to be sure
that the opening remains centered around the
retracted wheel Remove as much of rib W-2 as
necessary.
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