SIG Primary Force Control-Line Stunter Manual Download Page 6

HINGING THE  ELEVATORS
The CA Hinges supplied in this kit have a die-cut center slot that
can be used to accurately center the hinge equally into both the
stabilizer and elevators. To do this, get an old business card, or
similar stock, and use a scissors to cut some "wedges". The
wedges should be wide enough at one end so as not to pass
through the hinge slot cutout.

19) Test fit the CA hinges and the elevators onto the back of the

stabilizer. Place one of the card wedges into the center slot of
each hinge to keep the hinge centered. When you are satisfied
that everything fits properly, pull the elevator halves off the hinges
again. Leave the hinges and wedges in position in the back of the
stabilizer. Do this for both the right and left elevators.

20) Test fit the elevator joiner wire into the hole and groove in

the leading edge of each elevator. Make sure the joiner wire goes
in easily and that the elevators will be in straight alignment with
each other. Make slight alterations to the hole or slot if necessary.

21) After you are sure that the elevators, joiner wire, and hinges

will fit together easily, proceed with the final hinging as follows:

a) Insert the elevator joiner wire through the gap in the 

fuselage behind the stabilizer.

b) Tape a couple pieces of wax paper between the wire joiner 

and the stabilizer to prevent any excess epoxy from getting 
on the stabilizer.

c) Mix slow drying epoxy glue and coat the legs of the joiner 

wire with the glue. Install the elevator on the joiner wire and 
the hinges at the same time. Wipe off any excess epoxy that 
oozes out around the joiner wire. Install both elevators in 
this manner.

d) Push both elevators firmly up against the back of the stab.

Make sure that the entire elevator assembly is centered on 
the span of the stab. Also double check that the elevators are 
in alignment with each other. Remove card wedges from the 
hinges.

e) Set the proper amount of gap between the stab and elevators 

by deflecting the elevator about 45

O

each way.

This will 

automatically set the proper hinge gap. Make sure everything 
is functioning properly before proceeding to the next step.

14) Remove the covering material from the wing between the

marked lines, to allow for maximum gluing area. Use a sharp #11
hobby knife or single-edge razor blade to cut through the covering
material just inside the marked lines. Be very careful to cut the
covering material only - not the balsa wood structure underneath.
After you've cut through the covering material, peel the unwanted
covering off the wing.

15) Glue the wing permanently in place in the fuselage, being

very careful to get it back in perfect alignment before the glue
dries. To allow adequate working time for alignment and clean up,
use slow drying epoxy glue for this joint. Follow these steps:

a) Spread a thin coat of mixed epoxy glue on the bare wood at 

the center of the wing, top, and bottom.

b) Slide the fuselage over the right wing panel and into position 

at the center section.

c) Use a 90

O

square to double check the alignment of the wing 

and fuselage.

Use a couple of pins at the leading and 

trailing edges to hold the wing in position until the glue dries.

d) While the glue is drying, clean up any excess epoxy around 

the wing joint with a paper towel and rubbing alcohol. Double 
check the alignment one last time and set aside to dry.

INSTALL THE  STABILIZER
Remove the elevators, hinges, and wire joiner from the stabilizer
and set aside.

16) Slide the stabilizer into the rear slot in the fuselage. Slide it

to the front of the slot and use a 90

O

square to make the trailing

edge perpendicular to the fuselage as shown.

Now move behind the fuselage and check the alignment of the
stabilizer to the wing from the rear view. The wing and stabilizer
must be parallel to each other. If necessary, alter the stab cutout
in the fuselage to allow you to get the stab in proper alignment.

17) Once you have the stabilizer properly aligned, use a felt-tip

pen to mark the fuselage location on the top and bottom surfaces
of the stabilizer. Remove the stabilizer from the fuselage, and then
carefully remove the covering material between the lines. Remove
any residual ink lines with rubbing alcohol before proceeding.

18) Glue the stabilizer permanently in place in the fuselage,

being very careful to get it in perfect alignment before the glue
dries. Clean up any excess epoxy with a paper towel and alcohol.
Set aside until thoroughly cured.

6

Summary of Contents for Primary Force Control-Line Stunter

Page 1: ...he covering Over heating a seam can cause the covering to creep exposing the wood underneath For reshrinking AEROKOTE set your iron temperature to approximately 220O 250O F 104O 121O C 1 INTRODUCTION Congratulations on your purchase of the SIG Primary Force ARF The reason for the name Primary is that this contest winning stunt ship is really easy to build trim and fly It makes an excellent model f...

Page 2: ... 1 Stabilizer 2 Elevators 1 Joiner Wire installed but not glued 4 CA Hinges installed but not glued 1 Pushrod Wire 1 Metal Clevis 1 Clevis Retainer Spring 1 Clevis Lock Nut 1 Nylon Control Horn Retainer Plate 3 M2 x 15mm Phillips Head Bolts 1 Right Main Landing Gear 1 Left Main Landing Gear 2 M3 x 25mm Phillips Head Bolts 2 M3 Lock Nuts 2 Main Wheels 2 M3 x 25mm Phillips Head Axle Bolts 2 Wheel Bu...

Page 3: ...moved during trimming process FUEL TANK ASSEMBLY The fuel tank provided in this kit is a 4 oz clunk style plastic tank We have used this tank successfully on the Primary Force with either standard up down 2 vent plumbing and with uniflow plumbing The choice for your airplane is up to you based on your personal experience and preference For simplicity the following instructions will only show the i...

Page 4: ...J Bolts back in Use a rag soaked with rubbing alcohol to remove the ink lines and clean up any excess epoxy h Use six to eight 32 or 30 Rubber Bands not supplied to mount the fuel tank in place between the J Bolts as shown i Connect the tank s fuel feed line to the engine with a piece of heat proof silocone fuel line tubing not supplied j Optional Place a piece of foam rubber not supplied between ...

Page 5: ... to get the fuselage and the wing perpendicular to each other Since the wing of the Primary Force has a triple taper and is offset from center verifying the alignment by measuring is not a simple matter We will need to create a dependable way to verify the alignment accurately Fortunately if you look very closely at the surface of the Primary Force wing you will see that the front edge of the trai...

Page 6: ...o the next step 14 Remove the covering material from the wing between the marked lines to allow for maximum gluing area Use a sharp 11 hobby knife or single edge razor blade to cut through the covering material just inside the marked lines Be very careful to cut the covering material only not the balsa wood structure underneath After you ve cut through the covering material peel the unwanted cover...

Page 7: ...use a fine applicator tip on your glue bottle You will notice that the glue quickly wicks into the wood and the hinge Quickly turn the model over and apply 2 drops of glue to the other side of the hinge Continue this process until you have glued both sides of all the hinges Keep a rag handy to wipe off any excess CA glue Note If you get some glue smears on the plastic covering don t worry about th...

Page 8: ...neutral when the bellcrank is in neutral When you ve finished the adjustment slide the clevis retainer spring over the clevis and then tighten the clevis lock nut up against the back of the clevis LANDING GEAR 24 Install the tailwheel assembly on the bottom of the fuselage as follows a Trial fit the tailwheel wire into the pre cut slot in the bottom of the fuselage The wire should fit completely i...

Page 9: ...y removing the paper backing sheet and then laying the decal in position and pressing it in place with your finger For the larger decals we suggest the following method of application a Carefully cut out the decal with a hobby knife b Peel the paper backing sheet completely off the decal being careful not to let the sticky side double over and adhere to itself c Use a product like SIG Pure Magic M...

Page 10: ...ard wing should drop in a hard corner Make small adjustments one at a time Remove one of the weights from the box and cut off the corners of the weight Fly the model and see if the wing drops again in a hard corner If it does cut off the corners of another weight and fly again The Primary Force should pop a turn without any sign of wobble or hop while exiting a square turn If the model feels soft ...

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