background image

C. The throttle is closed almost all the way when
the left transmitter stick is down (back) and is
open completely when the stick is up (forward).

TRANSMITTER

STICK MOVEMENTS

CONTROL SURFACE

MOVEMENTS

ELEVATOR MOVES UP

RUDDER MOVES RIGHT

CARBURETOR WIDE OPEN

D 67. Check to make sure that the tail control surfaces
are in a neutral (straight) position and the servo arms are
perpendicular to the aluminum channel when the
transmitter sticks at neutral. Also check the control
throws on the tail surface. You should be able to move
the rudder 3/4" both directions and the elevator should

move 1/2" both directions. This should give you a plane

that is fairly responsive but not too radical.

D 68. Install the second nylon tie wrap around the

a l u m i n u m channel and the pushrods right in front of
the tail surfaces. This will help keep the control
surfaces from fluttering.

BALANCING

D 69. With the wing rubber banded to the fuselage, the
fuel tank empty, and everything else in its place, lift the

model by placing one finger tip on the bottom of each
wing at the approximate location of each end of the wing

joiner which is 3" back from the leading edge. The

STURDY BIRDY should hang just slightly nose down
or level. If the plane hangs with the nose pointing up
then you will need to add some weight to the nose of the
plane. There are several ways you can add this weight
including stuffing lead weight around the fuel tank or
using one of the heavy prop nuts available. Under no
circumstance should you try to fly the plane if it does
not balance correctly!

GETTING READY FOR FLYING

D 70. Use at least four rubber bands to hold the
engine/firewall in place and use eight #64 rubber bands
to hold the wing in place.

D 71. We recommend that you use a nylon propeller for
your first flights since it will not break as easily as wood.

Sand the edges of the prop before you use it. The edges
of nylon props are very sharp and should be dulled
before use. If a prop is damaged in any way it should be

discarded and a new prop used in its place.

D 72. Be sure to conduct a range test on your radio

system before every flying session. The instruction
manual that came with your radio should explain how
to properly do this.

D 73. If you are using a new engine in your plane, break

it in on the ground according to the manufacturer's
instructions before attempting to fly the plane.

D 74. Never try to start the engine by flipping it over
with your finger. Always use either an electric starter or
a "Chicken Stick".

D 75. Always adjust the needle valve on the engine from
the back of the plane. Never reach over a rotating
prop!
 Treat these engines with the utmost respect, they
are not toys!

D 76. After each flight, check the propeller, engine bolts,
control surfaces, control linkages, hinges and rubber
bands for damage or looseness and correct if necessary.

An ounce of prevention here will keep you happily
flying longer.

FLYING

The STURDY BIRDY is a very stable flying

airplane with a unique self-recovering system designed
into it. This makes it one of the easiest-flying planes
available. However, it is highly recommended that you
consult an experienced pilot to help trim out the plane
and help you with your first flights. The most
important thing to remember when learning to fly is
that you need to be able to relate to the control inputs
as if you were sitting in the plane. If you don't, it will
seem like the rudder is working backwards when the
plane is flying towards you. It may also seem a little
strange that you pull the stick down (back) in order to
make the plane go up, but this is how it works in real
planes. It is a good idea to keep facing the same
direction that the model is flying.

16

Summary of Contents for Sturdy Birdy

Page 1: ...der the direct supervision of a responsible adult If not handled correctly this model is capable of inflicting serious bodily harm It is your responsibility and yours alone to assemble this model corr...

Page 2: ...atter how long it may take The first thing you should do after reading this paragraph is check the parts in this kit against the parts list on the next page to make sure everything is here We strongly...

Page 3: ...RF1R02 Shaped Fin 1 ARF1R03 Rudder 1 ARF1A03 Small Wood Parts Sub Pack ARF1F03 Firewall Doubler 1 ARF1F04 Firewall 1 Stock Description Qty ARF1F05 Landing Gear Strips 2 ARF1S04 1 16 Ply Stab Doubler 1...

Page 4: ...slow speeds The Great Planes adjustable engine mount provided with the STURDY BIRDY will fit most 20 30 engines RADIO The STURDY BIRDY requires 3 channels to fly but there are not many 3 channel radio...

Page 5: ...r A sheet of wood or anything 1 8 thick laid down next to the piece makes it easy to do this Transfer the hinge locating marks from the side to the edges as shown above D 5 Use your hobby knife with a...

Page 6: ...e 1 64 plywood doubler to ONE side of the fin gluing it to the balsa doubler Check the fit again and if it is still a little loose add a plywood doubler to the other side If you need to you can sand t...

Page 7: ...s after the parts are covered Cut the slots for the hinges and test fit the stabilizer and the elevator together to check for proper alignment between the two parts STABILIZER D 14 The stabilizer and...

Page 8: ...g D 23 Lay some waxed paper down on the work surface and mix up another ounce or so of epoxy Spread the epoxy throughout the slot and on the root middle end of the other wing panel Slide the two wing...

Page 9: ...urface to loosen it up D 25 Trim the plastic center section protector to size by using either scissors or your hobby knife to cut along the scribe lines Use some coarse grit sandpaper to scratch up th...

Page 10: ...d into the nylon nutplate on the opposite side of the rudder Although not necessary you may use some wire cutters or an abrasive cutoff wheel to cut the screws off even with the plate D 33 The other c...

Page 11: ...t with four 4 x 1 2 sheet metal screws D 38 Test fit your engine to the mount Adjust the width of the rails to fit the engine Tighten the mounting screws securely Apply a couple of strips of masking t...

Page 12: ...ap the servo mounting lugs the front two servos should be mounted with their servo output shafts towards the back of the plane and the back servo should have its output shaft towards the front of the...

Page 13: ...threaded end of the 2 pieces D 52 Install the link rods in the 2nd hole from the outer end of each control horn With the control surfaces and the servo horns in their neutral positions cut the inner p...

Page 14: ...a good idea to use some medium strength thread locking cement on these bolts D 58 Drill a 1 8 diameter hole in each support using the attached landing gear as a guide Remove the supports from the fus...

Page 15: ...hes D 62 Cut the inner pushrod to length then cut and install the remaining 12 threaded link rod to hook up the throttle control Make sure you can achieve both full throttle and idle without binding o...

Page 16: ...ylon propeller for your first flights since it will not break as easily as wood Sand the edges of the prop before you use it The edges of nylon props are very sharp and should be dulled before use If...

Page 17: ...and be patient The STURDY BIRDY will lose altitude fairly quickly and you can resume control When preparing to land it is a good idea to make several practice passes from a safe altitude and graduall...

Page 18: ...PilotsLog Use this to record your flights it s fun to look back on Date Flight Time Conditions Comments 18...

Page 19: ...Date Flight Time Conditions Comments Engine Mount Template for 20 48 Adjustable Mount 19...

Page 20: ...he Sub T E against the trailing edge ofeach wing half The Sub T E should be oriented as shown in the sketch with the 90 degree corners along the bottom of the wing Epoxy the Sub T E to the trailing ed...

Page 21: ...s the top and mark the lop side of each piece Make another mark 7 16 from the inboard end ofeach piece Notch each piece to make a slot for the torque rod Note the threaded portion ofeach torque rod sh...

Page 22: ...poxy from seeping in Spread some epoxy in the slot and on the leading edge of the center trailing edge pieces Do notapplyanyepoxywithin 1 4 ofthenotchoryoumayglue thetorque rod Insert the torque rods...

Page 23: ...4 Epoxy the two 11 32 x 2 x 1 5 8 Tapered T E Supports to the inboard bottom of each center trailing edge as shown in the photo...

Page 24: ...ock with 150 grit sandpaper to sand the inner ends of the sub trailing edge center trailing edge and the tapered trailing edge to match the angle ofthe foam wing end Be careful not to change the angle...

Page 25: ...x 1 1 4 x 22 1 4 Ailerons in place against the sub trailing edge and under the torque rods Mark the location where the torque rods will enter the ailerons Drill a 3 32 hole in each aileron to accept t...

Page 26: ...7 Cut a groove in the leading edge of the aileron to allow clearance for the torque rods Trial fit the ailerons in place and cut as necessary until they fit...

Page 27: ...inge slots in each aileron The hinge slots should be approximately 1 1 2 10 and 18 from the wing tip Place the ailerons against the sub trailing edge and mark the hinge locations on the wing Draw a ce...

Page 28: ...9 Using a sanding block sand the leading edge of each aileron to a V shape as shown in the photo above...

Page 29: ...the wing Do not glue the hinges until after you have covered the wing Sand the outboard edge of the sub trailing edges and the ailerons to match the foam wing tips Now skip to step 21 on page 8 WING...

Page 30: ...uts in the Plastic Center Section Protector Therearescribelinesonthebottomsurfaceoftheprotector to help guide you Trial fit the aileron servo in place and trim as necessary to make it fit properly Use...

Page 31: ...Remove the protector and carve out a hole in the foam wing to fit your servo Carve out an extra 1 4 square groove in front and behind the servo cut out for the servo rails Drill a 1 2 diameter hole f...

Page 32: ...the front and back edges ofthe servo cut out Put the aileron servo in place and mark on the plastic protector where the servo mounting screws should be Drill 1 16 diameter holes on the marks you just...

Page 33: ...he cutouts in the foam wing if necessary to make the protector lie flat againstthewing Whensatisfiedwiththefit removetheservoanduse coarse sandpaper to scratch up the bottom of the wing protector so t...

Page 34: ...ers to make the Z bends and attach them to the servo horn Turn on your radio plug in your aileron servo and adjust the centering of the servohornuntil it is centered and therightaileronmoves up whenyo...

Reviews: