.
135. Inset a scrap of 1/16" plywood into the elevator and rudder on the opposite side from the control horn. This will prevent the
horn from pulling through the wood when subjected to unusual strain. The control horns should be installed before covering,
then removed until the covering is completed.
The stabilizer, elevator, fin and rudder should be covered
andlor filled before permanently gluing in the hinges. To
insure that the tail parts are solidly glued to the fuselage, cut
out the covering material in the mating areas to expose bare
wood. Puncture a series of 1/16" holes with a pointed wire in
the tail and the fuselage top where they make contact. Have
the holes at a slight angle to each other. When the epoxy
glue is worked into these holes and sets up it will act like
small nails, holding the parts together. The stabilizer saddle
on the fuselage may not fit up perfectly against the stab
because to make it do so might disturb the necessary seating of the main frame mounting gaps to the fuselage. If tl\e epoxy
glue does not fill the stab-fuselage joint completely, complete sealing the seam with a mixture of epoxy and micro-balloons.
136.
a. Cut the tail blocks to shape, using the top and side view patterns.
b. Sit the block in place on the fuselage and against the fin and trace the shape of the plastic top on the front of it.
137.
Put the fuselage top in place and cut the rear of the block to fit against it.
138.
Carve and sand the block to a rounded contour to match the shape of the plastic fuselage top.
It is suggested that the blocks not be glued on until the fuselage and tail have been covered, the tail mounted and the
plastic top permanently installed.
PUSHRODS
By the time most fliers get to a .60 powered airplane like the King Kobra, they have developed their own personal ideas
about their favorite types of pushrods. Normally we include balsa pushrods for the elevator and rudder in kits and have had
good results with them. But some builders worry about balsa pushrods in a very fast and aerobatic airplane. Others like
nylon tubing pushrods or hardwood dowels. Therefore, rather than put in (and have to charge for) a pushrod that some of
the builders would not use, we are furnishing none, leaving the choice to the individual buyer.
In the prototype King Kobras we used the Sig SH-654 Graphite Pushrods, a arrow-shaft type made from the new high-tech
carbon material that is finding so many uses in modeling. It is recommended for those who want to use the ultimate variety
rod. SIGSH559 Flexible Cable pushrods were used for the nose wheel and throttle.
RETRACTS
Because the King Kobra is a compact aircraft there is not a lot of wasted space in which to loose a retract unit. But that's
better than having room to spare and the extra drag that goes with it. We designed the model first and found a way of fitting
the gear into it, which seems to be a better approach than designing an airplane around a retract gear, particularly since the
majority of King Kobras will be built by sport fliers.
The Spring Air 200 Series Retract Gear was selected for the King Kobra because it was ideally suited to the space
available. The units were fitted in without having to compromise the concept of the model. They have proven to be both
reliable and durable. You may use either the No. 201outfit with double coil main gears, or the No. 202 with single coil main
gears. The shock coils are the only difference between them. We used single coil.