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VI      PREPARATION AND INSTALLATION OF RADIO

 

Model is fully covered and painted wherever 

necessary (Page 22).

 

Control surfaces are covered, and hinged in place (Page 23).

 

Tail assembly is glued solidly to fuse (Page23).

 

Engine screwed in place (Page 14).

 

Muffler on.

 

Prop in place.

 

Fuel tank installed, with foam rubber supports to hold it level.

 

Stab and rudder pushrods complete, rear end only (Page 14).

 

Landing gear and wheels installed.

2.  BALANCING THE MODEL

 

Tape stab and rudder pushrods to side of fuse with rear ends in  

approximate final position (refer to full size view on plan).

Set R/C airborne equipment temporarily in fuse (refer to plan for 

approximate location).

a) Battery most forward.
b)Receiver (RX) next.
c)Servos rearmost.
d) Install aileron servo in wing.

Refer to fuse side view on plan for “BALANCE RANGE,” then  

measure and mark this range at top of cabin sides.

Bolt wing in place on top of fuse.
Enlist someone’s aid to help you balance the model as shown.  

If you must balance it alone, make the simple balance stand at left  
from scrap lumber (2x4, etc.) to assist you Lift the model under the  
wing by finger tips.

a) Move finger tips or balance stand through the balance range until  

model is level.

b) If you need to support the model outside the balance range to  

get it level, remove wing and shift R/C equipment away from heavy  
end of model until model will balance within the range. The pre 
ferred location is at the main wing spar.

c) If shifting the R/C gear still doesn’t balance the model, add  

weight to extreme nose or tail respectively until it’s right. The least  
weight is needed when added as far forward.or back as possible.

Fasten weight permanently in place.

 

Carefully remove the wing, and mark on fuse interior       

the locations of all R/C parts.

 

Completing elevator and rudder pushrods.

a) Measure about 2” from the backsides of the servos to 

the balsa pushrods, and mark them at this point.

b) Remove pushrods from fuse, and cut them at marks.
c) Cut one 1/16” x12” wire in half, and use these pieces 

to complete forward end of pushrods.

3. Radio installation.

A. Read and follow the instructions that come with your radio.

B. Your batteries should be fully charged.
C. Refer to “Transmitter Function Sketch” and observe which servo            

wheels move when stick is moved for various controls.

 

Apply tape (which you can write on) to each servo. Identify each servo

for its control function. Mark the plug to each servo the same way: “R” for
rudder, “E” for elevator, “T” for throttle, “A” for ailerons. If your receiver
doesn’t have separate plugs for each servo, but places for the servos to plug in,
apply a piece of tape nearby that you can mark for each application.

If a servo mounting tray is furnished with your radio, it
makes it easier to mount servos. The most common tray
is a “2+1” type (as shown above left and in the main
plan view).Either a 2+1 or a 3-abreast can be used in the
CUB because of its wide roomy interior. Note: if a tray
is not used, the 3-abreast mounting is recommended with
servos mounted directly on plywood rails (as shown
below the main plan view).

 

For “2+1” mounting, with throttle servo at forward posi-

tion, place servo so output wheel is on same side as engine
throttle arm. For 3-abreast mounting, place throttle servo on
same side of model as throttle arm.

 

Rudder servo should be on side opposite to throttle servo.

4. Servo arrangement.

Summary of Contents for Cub

Page 1: ... provided later in the instructions We re sure that you will enjoy countless hours of flying fun with your Goldberg Cub just as generations of pilots have had with theirs Optional Parts For Door Details 1 16 black CG Color Stripe tape Pilot figure 2 Scale Pitts type muffler 2 cycle only Small tube silicone caulk Zap Formula 560 canopy glue For optional Military L 4 Scheme WWII decals various manuf...

Page 2: ...o not glue plywood adequately and also require that your work must be near perfect Be careful when using instant glue to install windows as applying too much glue can sometimes cause fogging to occur This can be easily wiped off with a damp rag A sure way to avoid fogging is to use either epoxy or Zap Formula 560 canopy glue After you have finished gluing the model together go back and re glue all...

Page 3: ...ld base and its installation If tinted windows are desired do not try to dye them the plastic does not dye well Instead we recommend transparent spray enamels be carefully applied to the inside window surface they are not fuel proof Covering The Model The full size Cub is of wood and metal construction which is covered with fabric The fabric is then painted For your model fabric types of cov ering...

Page 4: ...or knife or razor saw to assist in the removal of parts from sheet Sometimes a little trimming and sanding can improve parts where desired Save scrap until model is completed in case you should miss a part Scrap is used also in some building steps on the plan Other easily recognized parts such as engine bearers are not shown here Wood Parts Identification ...

Page 5: ...5 ...

Page 6: ...terial make stabilizer stab trailing edge T E Cut balsa carefully to match with plan at ends Pin in place Position and pin die cut center platform over plan Cut stab leading edge L E joiner from 1 4 x 3 4 balsa to match with plan and pin in position Assemble die cut curved L E segments to form stab outline glue all parts together 2 From 1 8 x 1 4 strip balsa cut all trusses to size over plan Trim ...

Page 7: ...ter 8 Repeat this method in step 7 for fin and rudder First break corners with the sanding block Then follow with stab sanding tool rounding off all outside edges except bottom of fin and the rudder L E Blend stab and elevator at tips IMPORTANT The hinges are not 9 Using a sanding block flat sand stab elevator fin and rudder smoothing out surfaces Using no glue TEMPORARILY attach elevator to stab ...

Page 8: ...glue to one part as shown at left Keep edges aligned as you close firewalls and tape opposite edges together squeeze firewalls together using die cut clamps When dry remove clamps and tapes set clamps aside for use later Temporarily position cabin sides in notches Check f it and placement of parts before gluing Glue cabin sides to fuse Temporarily position cabin and landing gear L G doublers on fu...

Page 9: ...4 ply motor mount extension is no longer needed with the change to the fiber filled engine mounts now included with the kit If you have an older plan please disregard any reference to the ply extension 9 Mount propeller on your engine Position engine over fuse top view on plan and compare it to the installation shown Back of your prop should protrude 1 8 to 1 4 beyond the cowl front as shown on th...

Page 10: ... 12c With die cut separation facing out insert bottom sheet under rubber bands at former C and work it towards tail slipping it under bands as you go 12d Lock tabs at sides and ends of bottom sheet into corresponding notches in fuse sides Hold parts with tape 12e Working through former C position top sheet in same manner sliding it towards rear 12f Position stab platform between fuse ends and hold...

Page 11: ...d of A along all joints inside and outside or from both sides in the case of formers it will penetrate the joint and leave a slight reinforcing fillet At tail end glue bottom sheet to conform to slight bend in fuse sides 19 Trial fit the tail wheel bracket at die cut separation in bottom sheet The bracket flange will probably not fit the slot Using a small saw enlarge slot as required for correct ...

Page 12: ...outs at each end of mount must be positioned evenly over the slot in the fuse bottom Glue mount in place The L G braces interlock with L G mount and the slots must be matched to those in the fuse sides IMPORTANT the arrow stamped on each braced must be positioned towards the front of the model Glue in place Position side rail tabs in fuse notches and glue in place 25 Glue instrument panel solidly ...

Page 13: ...und windows Cut front triangle window from others along center of connecting flange Using no glue at this time temporarily fit windows into fuse openings if they fit too tight remove and lightly sand openings the minimum required for good fit Remove windows and set aside until later 33 To protect the engine area from becoming oil soaked it needs to be fuel proofed Either polyurethane CA or epoxy i...

Page 14: ... 1 16 dia hole at end of recess in both pushrods Glue rods into balsa pushrods as shown When dry taper ends of pushrods and round off corners bind with strong thread coat with glue and let dry 2 x3 8 SHEET METAL SCREW TO INSTALL 2 SCREW FIRST DRILL 1 16 DIA HOLES 37 Insert formed wire L G struts in fuse Position nylon landing gear straps then mark drill and mount with 2 x 3 8 screws see above and ...

Page 15: ...lue place one No 5 over rib 3 location on plan and two more ribs 5 as shown Position L E sheeting over plan and pin in place Slide L E sheeting in place under rib fronts until it stops at rib notch Butt sheet next to L E filler rib No 2 location over plan Pin in place 3 For short wing proceed directly to step 4 For long wing cut a T E filler piece from 11 7 8 sheet Cut filler to fit from center of...

Page 16: ... 15 At locations shown on plan glue two strut mounting plates in place Rear plate is glued directly over T E sheeting for short wing move mounts one rib bay inboard as indicated on plan Drill a 1 16 hole through each mount at punch mark location 16 Position L E dowel butting it against rib 6a and checking it to be flush with rib No 2 If the dowel in your kit is over length trim it to fit as shown ...

Page 17: ...y Slide brace tabs into rib slots behind main spar Push tip fully in engaging front in rib 6a slot Glue tip securely in place Glue tip rear to T E sheeting and T E 23 Starting at rib 6 taper T E down to level of ply tip Try to keep taper straight Lightly sand Cut T E sheeting flush with tip 24 Position top T E sheeting in rib notches Align sheet end at center of rib 2 Remove sheet apply a bead of ...

Page 18: ...oo little than too much TEMPORARILY set dihedral joiners in place using die cut clamps provided to hold joiners tight against spars Be sure RIGHT WING is held firmly against LEFT WING and pin in place as shown above Remove joiners 4 Apply a liberal bead of glue to joints of spars sheeting and T E Apply two ribbons of glue to one side of both main spar joiners near the top and the bottom Position o...

Page 19: ...t bend location on plans see above and bend wire horizontal ly 90degrees Check on table adjust as necessary 10d Make 2nd aileron horn opposite to first one by bend ing UNTHREADED end as shown above For short wing after bending measure and cut wires so only 3 4 length remains 10e File bent ends of wire to a pointed shape for easier mounting of ailerons later on 11 From the three 24 ailerons provide...

Page 20: ... of aileron and tip T E Glue tip T E pieces in place Carefully cut tip to shape Repeat for opposite tip 16 With corners stamped M towards bottom position ply horn angle gauge at threaded end of one horn wire slowly press aileron on other 3 4 end of wire to make a mark With a small nail make a hole for the wire Work carefully keeping the hole centered inside the aileron Repeat for other aileron Whe...

Page 21: ...ing tip and stick one end of 1 1 2 wide nylon to it Let dry until the nylon is glued solidly to the balsa 21b Cut openings in nylon for aileron horns Apply a squiggle of glue to wing and pull nylon fabric down into it Rub nylon into glue with your finger cover fin ger with plastic bag or similar 20c Repeat gluing procedure and apply nylon around T E across top of wing and out past the L E spar do ...

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Page 24: ...k to the wing rest surface on top of the fuse Install wing and bolt down moderately do no wipe off the silicone that squeezes out Let dry overnight Remove wing and using a sharp blade trim excess flush with fuse sides Bolt wing in place on fuse Using no glue trial fit stab in place on fuse adjusting as necessary to line up with wing Then measure from stab tips to fuse front arrows A to make sure s...

Page 25: ...ge holes with a 3 16 drill Hold wheel loosely so it will center itself while drilling and use slow drill speeds if possible Refer to plan and bend up 1 4 of tail wheel wire Glue eyelet into rudder bottom to match bend Plug wire into rud der eyelet then glue and screw nylon bracket securely to fuse OPTIONAL Instead of bending the wire into the rud der glue scrap tubing to rudder bottom and insert s...

Page 26: ...her end off at the fuse behind the L G fairing Bend recess and glue second hold down in bottom of strut end Attach this hold down to fuse bottom using a 2 shoulder screw Install rear strut in same manner Cut rear strut to butt against front strut and glue IMPORTANT the struts must not alter or twist the wing TAIL WIRE BRACING To simulate bracing use 1 16 elastic cord from sewing shop Drill holes t...

Page 27: ... weight is needed when added as far forward or back as possible Fasten weight permanently in place Carefully remove the wing and mark on fuse interior the locations of all R C parts Completing elevator and rudder pushrods a Measure about 2 from the backsides of the servos to the balsa pushrods and mark them at this point b Remove pushrods from fuse and cut them at marks c Cut one 1 16 x12 wire in ...

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Page 33: ...32 Super Tote Field Box Part 102 ...

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