instructions for final assembly - horizon hobby€¦ · instructions for final assembly. fairchild...

Made in Vietnam.

Wingspan -------------------------------------------- 156 cm, 61.42 in.Wing area --------------------------------- 3900 sq.cm, 604.5 sq.in.Approximate flying weight ------------ 2.6-2.9 kg, 5.72-6.38 lbs.Recommended engine size ------------- .46-.52 cu.in 2-stroke. .52 cu.in 4-stroke.Recommended R/C ------------------------- 4 channels with 6 servos minimum.

Specifications:

“Graphics and specifications may change without notice”.

MS: 11

INSTRUCTIONS FOR FINAL ASSEMBLY

FAIRCHILD PT-19 Instruction Manual

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INTRODUCTION.

Thank you for choosing the PT-19 ARTF by SEAGULL MODELS. The PT-19 was designed with theintermediate/advanced sport flyer in mind. It is a low-wing scale aeroplane which is easy to fly andquick to assemble. The airframe is conventionally built using balsa, plywood make it stronger thanthe average ARTF , yet the design allows the aeroplane to be kept light. You will find that most of thework has been done for you already. The pushrods are pre-made to the correct lengths, the motormount has been fitted and the hinges are pre-installed and pinned for security. Flying the PT-19 issimply a joy.

This instruction manual is designed to help you build a great flying aeroplane. Please read thismanual thoroughly before starting assembly of your PT-19 . Use the parts listing below to identify allparts.

WARNING.

Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is capableof causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU ASSUME ALLRISK & RESPONSIBILITY.

If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplierand join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of trainingprocedures designed to help the new pilot on his way to successful R/C flight. They will also be ableto advise on any insurance and safety regulations that may apply.

ADDITIONAL ITEMS REQUIRED.

- .46-.52 2-stroke engine.- .52 4-stroke engine.- 4-channel radio with 6 servos.- Glow plug to suit engine.- Propeller to suit engine.- Protective foam rubber for radiosystem.- Silicone fuel line.- Stick-on weights for balance

(If necessary).

TOOLS & SUPPLIES NEEDED.

- Thick cyanoacrylate glue.- 30 minute epoxy.- 6 minute epoxy.- Hand or electric drill.- Assorted drill bits.- Modelling knife.- Straight edge ruler.- 2mm ball driver.- Phillips head screwdriver.- 220 grit sandpaper.- 90° square or builder’s triangle.- Wire cutters.- Masking tape & T-pins.- Thread-lock / Paper towels.

PARTS LISTING.

FUSELAGE ASSEMBLY* (1) Fuselage.* (1) Pre-installed throttle pushrod &tube.* (1) Pre-installed servo tray.* (1) Pre-installed rudder pushrod.* (1) Pre-installed elevator pushrod.

WING ASSEMBLY.

* (1) Right wing half with pre-installed aileron.* (1) Left wing half with pre-installedaileron.* (2) Pre-installed plywood aileronservo tray in each wing.* (1) Plywood wing dihedral brace.* (1) Covering strip for centresection joint.

TAIL SECTION ASSEMBLY.

* (1) Vertical stabilizer with pre-installed rudder.* (1) Horizontal stabilizer with pre-installed elevator halves.


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NOTE: To avoid scratching your new aero-plane we suggest that you coveryour workbench with an old towel.Keep a couple of jars or bowls handyto hold the small parts after you openthe bags.Please trial fit all parts. Make sureyou have the correct parts and thatthey fit and are aligned properly be-fore gluing! This will ensure properassembly as the PT-19 is madefrom natural materials and minor ad-justments may have to be made.The paint and plastic parts used inthis kit are fuel proof. However, theyare not tolerant of many harsh chemi-cals including the following: paintthinner, cyano-acrylate glue accel-erator, cyanoacrylate glue de-bonderand acetone. Do not let these chemi-cals come in contact with the colourson the covering and the plastic parts.

The control surfaces, including theailerons, elevators, and rudder, areprehinged with hinges installed, but thehinges are not glued in place. It isimperative that you properly adhere thehinges in place per the steps that followusing a high-quality thin C/A glue.

1) Carefully remove the aileron from one ofthe wing panels. Note the position of the hinges.

2) Remove each hinge from the wing paneland aileron and place a T-pin in the center ofeach hinge. Slide each hinge into the wingpanel until the T-pin is snug against the wingpanel. This will help ensure an equal amountof hinge is on either side of the hinge line whenthe aileron is mounted to the aileron.

HINGING THE AILERONS.

Note:

Hinge.

T-pin.

Hinge.

T-pin.


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T-pin.

T-pin.

Work the aileron up and down severaltimes to “work in” the hinges and checkfor proper movement.

HINGING THE ELEVATORS.

Note:

4)Deflect the aileron and completelysaturate each hinge with thin C/A glue. Theailerons front surface should lightly contact thewing during this procedure. Ideally, when the

8) After both ailerons are securely hinged,firmly grasp the wing panel and aileron tomake sure the hinges are securely glued andcannot be pulled out. Do this by carefullyapplying medium pressure, trying to separatethe aileron from the wing panel. Use cautionnot to crush the wing structure.

7) Repeat this process with the other wingpanel, securely hinging the aileron in place.

5) Turn the wing panel over and deflect theaileron in the opposite direction from theopposite side. Apply thin C/A glue to eachhinge, making sure that the C/A penetrates intoboth the aileron and wing panel.

6) Using C/A remover/debonder and a papertowel, remove any excess C/A glue that mayhave accumulated on the wing or in the aileronhinge area.

The hinge is constructed of a specialmaterial that allows the C/A to wick orpenetrate and distribute throughout thehinge, securely bonding it to the woodstructure of the wing panel and aileron.

hinges are glued in place, a 1/64” gap or lesswill be maintained throughout the lengh of theaileron to the wing panel hinge line.

Note:

C/A glue.

C/A glue.

Glue the elevator hinges in place using thesame techniques used to hinge the ailerons.

3) Slide the wing panel on the aileron untilthere is only a slight gap. The hinge is nowcentered on the wing panel and aileron.Remove the T-pins and snug the aileronagainst the wing panel. A gap of 1/64” or lessshould be maintained between the wing paneland aileron.


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Glue the rudder hinges in place using thesame techniques used to hinge the ailerons.

HINGING THE RUDDER.

Carefully slide the two wing halves togetherand firmly press them together, allowing theexcess epoxy to run out. There should not beany gap in the wing halves. Use rubbingalcohol and a paper tower to clean up anyexcess epoxy.

Apply masking tape at the wing join to holdthe wing halves together securely.

Epoxy.

Hinge.

1) Test fit the wing tube into each wing half.The brace should slide in easily up to thecentreline that you drew.If not, use 220 gritsandpaper with a sanding block and sanddown the edges and ends of the brace until itfits properly.

Masking tape.

WING ASSEMBLY.

NOTE: We highly recommend using 30minute epoxy as it is stronger and providesmore working time, allowing the builder toproperly align the parts. Using fast cure epoxywhen joining the wing halves could result in theglue drying before the wing halves are alignedproperly which may result in failure of the wingcentre section during flight.

Centre line.

2) Remove the brace when satisfied withits fit ineach wing half. Coat both sides of onehalf of the dihedral brace with 30 minute epoxy.Next, pour some epoxy into the dihedral box inone wing panel. Make sure you cover the topand bottom as well as the sides of the dihedralbrace. Use enough epoxy to fill any gaps.

3) Peel off the backing from the self adhe-sive covering strip. Apply the strip to the centresection of the wing starting from the bottomtrailing edge. Wrap the strip all the way aroundthe wing until it meets the trailing edge again.Trim off any excess strip.


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4) When the epoxy has cured, carefullyremove the masking tape from the wing.

5) Peel off the backing from the selfadhesive covering strip. Apply the strip to thecentre section of the wing starting from thebottom trailing edge. Wrap the strip all the wayaround the wing until it meets the trailing edgeagain. Trim off any excess strip.

INSERT PLYWOOD WASHER.

INSTALLING THE AILERON SERVOS.

1) Install the rubber grommets andbrass collets onto the aileron servo. Test fitthe servo into the aileron servo mount.

Because the size of servos differ, youmay need to adjust the size of the precutopening in the mount. The notch in thesides of the mount allow the servo leadto pass through.

Remove covering.Remove covering.

Glue attach.

Masking tape.

3) Tie a weight such as the fuel tankpickup to a piece of string. Carefully feed thestring through the wing and out of the servo.

Weight.

String.

2) Temporarilly install the aileron servointo the servo mount, with the output shafttowards the leading edge of the wing. Drill1mm pilot holes through the mount. Removethe servo from the wing.


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String.

4) Attach the string to the servo leadand carefully thread it though the wing. Onceyou have thread the lead throught the wing,remove the string so it can use for the otherservo lead. Tape the servo lead to the wing toprevent it from falling back into the wing.

5) Tape the servo lead to the wing toprevent it from falling back into the wing.

6) Reinstall the servo into the servomount and secure the servo inplace using thewood screws provided with you radio system.

Repeat the procedure for the other winghalf.

String.

String.

Servo wire.

Plastic tape.

AILERON LINKAGE. 1) Using a ruler & pen to draw a straight

line as picture below.

Pen.

Line.


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7) Make a 90-degree bend at the markand cut off the excess wire leaving 7mm pastthe bend.

9) Connect the linkage as shown andsecure the control wire with a wire keeper.

Repeat the procedure for the other ai-leron servo.

6) With the aileron servo centered andthe aileron even with the trailing edge of thewing attach the clevis to the control horn. Markthe control wire where it crosses the servoarm hole.

2) Locate the two nylon control horns, twonylon control horn backplates and fourmachine screws.

3) Position the aileron horn on the bottomside of aileron. The clevis attachment holesshould be positioned over the hinge line.

Control Horn.

Mounting Screws. Mounting Plate.

4)Using a 1mm drill bit and the controlhorns as a guide, drill the mounting holesthrough the aileron halves.

5) Mount the control horns by insertingthe screws through the control horn bases andaileron halves, then into the mountingbackplates. Do not overtighten the screws orthe backplates may crush the wood.

Pen.

Cut.

2mm X 20mm.

Clevis.

Snap keeper.

7mm.


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Removecovering.

Main gear mounting slot.

MAIN LANDING GEARINSTALLATION.

INSTALLING THE MAIN GEAR WIRES.

1) Using a modeling knife, remove thecovering from over the two main gear mount-ing slots located in the bottom of the wing. Oneslot is located in each wing half.

5) Remove the two straps and the gearwire. Drill four 1mm pilot holes into the wingfor the wood screws. Be careful not to drill through the topof the wing!

2) Insert the 90º bend of one main gearwire into the predrilled hole in one mountingslot.

3) The landing gear wire is held in placeusing two nylon landing gear straps and four3mm x 10mm wood screws. NOTE: The straps should be locatedequal distance from the inside and outsideends of the wire.

4) Using the two landing gear straps asa guide, mark the locations of the four 3mm x10mm mounting screws onto the wing sur-face.

Traps.

6) Reinstall the gear wire and installthe straps using the four 3mm x 10mm woodscrews. Tighten the screws completely tosecure the gear wire in place.

INSTALLING THE MAIN GEAR WHEELS.

2) Slide one wheel onto each axle andpush them up against the wheel collars. Slidethe remaining wheel collars with set screwsonto the axles. Push them up against thewheels and tighten the set screws. Thewheels should spin free and not bind in anyway. If they do bind, loosen the set screws inthe outer wheel collars and move the collarsout a small amount. Retighten the set screws.

1) Slide one wheel collar screw ontoeach axle. Push the wheel collars on as faras they will go and tighten the set screws.

Be careful not to overtighten the setscrews. Overtightening may cause thethreads to strip.


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Attach the silicone fuel, feed and pressurepipe to the tank. The lower pipe is the ‘feed’and the upper is the ‘pressure’ . The siliconefuel pipe is the next of feed pipe.

5) With the stopper assembly inplace, the weighted pickup should rest awayfrom the rear of the tank and move freely in-side the tank. The top of the vent tube shouldrest just below the top of the tank. It shouldnot touch the top of the tank.

6) When satisfied with the align-ment of the stopper assembly tighten the 3mmx 20mm machine screw until the rubber stop-

INSTALLING THE STOPPER ASSEMBLY.

1) Using a modeling knife, carefully cutoff the rear portion of one of the 3 nylon tubesleaving 1/2” protruding from the rear of thestopper. This will be the fuel pick up tube.

2) Using a modeling knife, cut onelength of silicon fuel line. Connect one end ofthe line to the weighted fuel pick up and theother end to the nylon pick up tube.

3) Carefully bend the second nylon tubeup at a 45º angle. This tube is the vent tube.To set the angle of the vent tube use a lighteror heat gun to heat the tube (do not melt thetube).

FUEL TANK.

When the stopper assembly is installedin the tank, the top of the vent tube should restjust below the top surface of the tank. It shouldnot touch the top of the tank.

4) Test fit the stopper assembly intothe tank. It may be necessary to remove someof the flashing around the tank opening usinga modeling knife. If flashing is present, makesure none falls into the tank.

Vent tube.

Fuel Pick up Tube.

Fuel fill Tube.

INSTALLING THE ENGINE MOUNT.

See pictures below:

M4 machinescrew.

4x20mm.


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Slide the tank into the fuselage from insideso that the neck is at the top of the fuselageand it locates through the engine bulkhead.Gently secure it to the top horizontal formerwith the cable tie .

MOUNTING THE ENGINE.

PARTS REQUIRED

1) Install the pushrod housing throughthe predrilled hole in the firewall and into theservo compartment. The pushrod housingshould protrude 1/4" out past the front of thefirewall. Make a Z-Bend 1/4" from one end ofthe plain wire pushrod.

Vent tube.

Fuel fill Tube.

Fuel Pick upTube.

Fuel Tank.

3 x 25mm.

2) Bolt the engine to the enginemount using the four machine screws.Double cheek that all the screws are tightbefore proceeding.

Pushrod wire.

115mm.

3) Attach the Z-Bend in the pushrodwire to the throttle arm on the carburetor. Youwill need to remove the throttle arm from thecar- buretor to be able to attach the Z-bend.When complete, reattach the throttle arm tothe carburetor.

Blow through one of the lines to en-sure the fuel lines have not become kinkedinside the fuel tank compartment. Airshould flow through easily.

You should mark which tube is thevent and which is the fuel pickup

when youattach fuel tubing to the tubes in thestopper. Once the tank is installed insidethe fuselage, it may be difficult to determineeach of them.


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7) Slide the cowl back over the engineand secure it in place using four 3mm x 10mmwood screws. See picture below.

front of the cowl should be positioned so thecrankshaft is in the middle of the cowl open-ing. Hold the cowl firmly in place using piecesof masking tape.

4) With the cowl held firmly in place,transfer the marks from the fuselage, that weredrawn onto the fuselage previously, onto thecowl. Using a ruler and a pen, measure for-ward from the back edge of the cowl, at thefour mounting locations, and place a mark.

5) While holding the cowl firmly in po-sition, drill four 1mm pilot holes through boththe cowl and through the fuselage side.

Because of the diameter of the cowl,it may be necessary to use a needle valveextension for the high speed needlevalve. Make this out of sufficient length1.5mm wire and install it into the end ofthe needle valve. Secure the wire in placeby tightening the set screw in the side ofthe needle valve.

6) Remove the cowl using a 2.5mmdrill bit. Enlarging the holes through the cowlwill prevent the fiberglass from splitting whenthe mounting screws are installed.

9) Install the muffler and muffler exten-sion onto the engine and make the cutout inthe cowl for muffler clearance. Connect thefuel and pressure lines to the carburetor, muf-fler and fuel filler valve.

PARTS REQUIRED{1} Molded Fiberglass Cowling{4} 3mm x 10mm Wood Screws

COWLING.

MOUNTING THE COW.

2) Slide the fiberglass cowl over theengine and line up the back edge of the cowlwith the marks you made on the fuselage.

3) While keeping the back edge of thecowl flush with the marks, align the front ofthe cowl with the crankshaft of the engine. The

1) You should make holes on cowl tosuit your engine. See photos below.


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INSTALLING THE FUSELAGE SERVOS.

INSTALLING THE SWITCH.

1) Install the switch into the precut holein the fuselage. Use the two screws providedwith the switch to secure it in place.

Open holefor air intake.

2) Install the rubber grommets and brasscollets onto the elevator, rudder and throttleservos. Test fit the servos into the preinstalledservo tray. Because the size of servos dif-fer, you may need to adjust the size of theprecut openings in the tray.

3) Position the servos into the servo traywith the output shafts orientated as shownbelow. Drill 1/16” pilot holes through the trayfor each of the mounting screws.

Install servos arm to servos. Notice the po-sition of the servo arms on the servos. Seepicture below.

Rudder.

Elevator.

Throttle.

Elevator.

Switch.

Throttle.

Elevator.

Rudder.

Elevator.

Switch.

Switch.


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2) Remove the stabilizer. Using thelines you just drew as a guide, carefully re-move the covering from between them usinga modeling knife.

4) When you are sure that everythingis aligned correctly, mix up a generous amountof 30 Minute Epoxy. Apply a thin layer to thetop and bottom of the stabilizer mounting areaand to the stabilizer mounting platform sidesin the fuselage. Slide the stabilizer in placeand realign. Double check all of your mea-surements once more before the epoxy cures.Hold the stabilizer in place with T-pins or mask-ing tape and remove any excess epoxy usinga paper towel and rubbing alcohol.

3) Using a modeling knife, carefully re-move the covering that overlaps the stabilizermounting platform sides in the fuselage. Re-move the covering from both the top and thebottom of the platform sides.

When cutting through the covering toremove it, cut with only enough pressureto only cut through the covering itself.Cutting into the balsa structure mayweaken it.

Pen.

4) Install the wing onto the fuselage.Align the centerline drawn on the top and therear of the stabilizer with the center of the fu-selage. When that is aligned, hold the stabi-lizer in that position using T-pins or maskingtape. Align the horizontal stabilizer with thewing. When viewed from the rear, the hori-zontal stabilizer should be level with the wing.If it is not level, use sandpaper and sand downthe high side of the stabilizer mounting plat-form until the proper alignment is achieved.The tips of the stabilizer should also be equaldistance from the tips of the wing.

5) When you are satisfied with the align-ment, hold the stabilizer in place with T- pinsor masking tape, but do not glue at this time.

2) Using a modeling knife, carefullyremove the covering from over the vertical sta-bilizer mounting slot in the top of the fuselage.

3) Slide the stabilizer into place in thepre-cut slot in the rear of the fuselage. Thestabilizer should be pushed firmly against thefront of the slot.

HORIZONTAL STABILIZER.PARTS REQUIRED

ALIGNING THE HORIZONTAL STABILIZER.

1) Using a ruler and a pen, locate thecenterline of the horizontal stabilizer, at the trail-ing edge, and place a mark. Use a triangleand extend this mark, from back to front,across the top of the stabilizer. Also extendthis mark down the back of the trailing edge ofthe stabilizer.

{1} Horizontal Stabilizer with Elevator Halves

MOUNTING THE HORIZONTAL STABILIZER.

1) With the stabilizer held firmly inplace, use a pen and draw lines onto the sta-bilizer where it and the fuselage sides meet.Do this on both the right and left sides and topand bottom of the stabilizer.

Draw centerline.

Remove covering.


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VERTICAL STABILIZERINSTALLATION.

PARTS REQUIRED

{1} Vertical Stabilizer with Rudder

1) Using a modeling knife, remove thecovering from over the precut hinge slot cutinto the lower rear portion of the fuselage. Thisslot accepts the lower rudder hinge.

2) Slide the vertical stabilizer into theslot in the top of the fuselage. The rear edgeof the stabilizer should be flush with the rearedge of the fuselage and the lower rudderhinge should engage the precut hinge slot inthe lower fuselage. The bottom edge of thestabilizer should also be firmly pushed againstthe top of the horizontal stabilizer.

ALIGNING THE VERTICAL STABILIZER.

5) After the epoxy has fully cured, re-move the masking tape or T-pins used to holdthe stabilizer in place. Carefully inspect theglue joints. Use more epoxy to fill in any gapsthat may exist that were not filled previouslyand clean up the excess using a paper toweland rubbing alcohol.

Hinge.

Hinge Slot.

3) While holding the vertical stabilizerfirmly in place, use a pen and draw a line oneach side of the vertical stabilizer where itmeets the top of the fuselage.

4) Remove the stabilizer. Using a mod-elling knife, remove the covering from belowthe lines you drew. Also remove the coveringfrom the bottom edge of the stabilizer and thebottom and top edges of the filler block. Leavethe covering in place on the sides of the fillerblock.

When cutting through the covering toremove it, cut with only enough pressureto only cut through the covering itself.Cutting into the balsa structure mayweaken it.

Pen.

Remove covering.


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6) When you are sure that everything isaligned correctly, mix up a generous amount ofFlash 30 Minute Epoxy. Apply a thin layer to themounting slot in the top of the fuselage and tothe sides and bottom of the vertical stabilizermounting area. Apply epoxy to the bottom andtop edges of the filler block and to the lowerhinge also. Set the stabilizer in place and re-align. Double check all of your measurementsonce more before the epoxy cures. Hold thestabilizer in place with T-pins or masking tapeand remove any excess epoxy using a papertowel and rubbing alcohol. Allow the epoxy tofully cure before proceeding.

5) Slide the vertical stabilizer back inplace. Using a triangle, check to ensure thatthe vertical stabilizer is aligned 90º to the hori-zontal stabilizer.

90º

VerticalStabilizer.Horizontal

Stabilizer.

CONTROL HORN INSTALLATION.

1) Locate the two nylon control horns, twonylon control horn backplates and fourmachine screws.

2) Position the elevator horn on the rightand left side of elevator. The clevis attach-ment holes should be positioned over the hingeline.

3) Using a 1.5mm drill bit and the controlhorns as a guide, drill the mounting holesthrough the elevator halves.

4) Mount the control horns by inserting thescrews through the control horn bases andeleva- tor halves, then into the mountingbackplates. Do not overtighten the screws orthe backplates may crush the wood.

5) Position the rudder control horn on theleft side of the airplane. Mount the control hornparallel with the horizontal stabilizer, not in-line with the rudder hinge line.

Control Horn.

Mounting Screws. Mounting Plate.

2mm X 20mm.

6) Install the rudder control horn using thesame method as with the elevator controlhorns.

Epoxy glue.


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ELEVATOR - RUDDER PUSHROD INSTALLATION.

Elevator control horn.

Right side.

Pushrod. Clevis.

ElevatorPushrod.

Rudderpushrod.

3) While holding the clasp firmly in place,use a pen and outline the clasp onto the rud-der.

4) Remove the clasp, and using a mod-eling knife, remove the covering from insidethe lines you drew. Use 220 grit sandpaperand carefully roughen the inside surface of thenylon clasp.

5) Slide the clasp back into position andcarefully glue it into place using Kwik Bond ThinC/A. Hold the clasp in place until the glue com-pletely cures. Secure by 1 machine screw.

2) Using a ruler and a pen place a markonto the bottom of the rudder. The back edgeof the clasp should line up with this mark.Youmay find it necessary to bend the tail wheelwire down slightly so it lines up with the claspwithout binding.

1) Align the tail wheel wire so that the wireis parallel with the bottom of the rudder. Thecontrol clasp has a predrilled hole through thetop of it. Slide this hole onto the tail wheel wirewhile sliding the clasp over the bottom of therudder.

MOUNTING THE CONTROL CLASP.

Control clasp.

2x20mm.Machine Screw

Elevator controlhorn both side.

Rudder control horn.

Elevator control horn.

Left side.


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Epoxy glue.

M2 X6mm.

1) Plug the five servo leads and the switchlead into the receiver. Plug the battery packlead into the switch also.

2) Wrap the receiver and battery pack inthe protective foam rubber to protect themfrom vibration.

INSTALLING THE RECEIVER AND BATTERY.

Antenna.RubberBand.

ModifiedServo Arm.

Cut.

3) Using a 1/16” drill bit, drill a hole throughthe side of the fuselage, near the receiver, forthe antenna to exit. Route the antenna out ofthe fuselage and secure it to the vertical stabi-lizer using a rubber band and a modified servoarm. See picture as below.

When balancing the airplane you mayneed to move the battery or receiver for-ward or after to achieve proper balance.

Battery.

Tie wrap.

PILOTS INSTALLATION.

1) It is critical that your airplane be bal-anced correctly. Improper balance will causeyour plane to lose control and crash. The cen-ter of gravity is located 6.5cm-7.5cm backfrom the leading edge of the wing measure atthe wing tip. Balance the PT-19 upside downwith the fuel tank empty.

BALANCING.

2) If the nose of the plane falls, the planeis nose heavy. To correct this first move thebattery pack further back in the fuselage. Ifthis is not possible or does not correct it, sticksmall amounts of lead weight on the fuselagesides under the horizontal stabilizer. If the tailof the plane falls, the plane is tail heavy. Tocorrect this, move the battery and receiverforward orif this is not possible, stick weightonto the firewall or use a brass heavy hub spin-ner hub, similar to those offered by Harry Higley.When balanced correctly, the airplane shouldsit level or slightly nose down when you lift itup with your fingers.

5mm.

M2 x 6mm.

5mm.

60mm.

A. B.

A. B.

Silicon glue.

60mm.


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ATTACHMENT WING-FUSELAGE.

See pictures below:

CONTROL THROWS.

1) We highly recommend setting upthe PT-19 using the control throws listed be-low. We have listed control throws for bothinitial test flying/sport flying and aerobatic fly-ing.

FLIGHT PREPARATION.

1) Check the operation and direction of theelevator, rudder, ailerons and throttle. A) Plug in your radio system per themanufacturer's instructions and turn every-thing on.

B) Check the elevator first. Pull back onthe elevator stick. The elevator halves shouldmove up. If it they do not, flip the servo re-versing switch on your transmitter to changethe direction.

C) Check the rudder. Looking from be-hind the airplane, move the rudder stick to theright. The rudder should move to the right.

4) By moving the position of the adjust-able control horn out from the control surface,you will decrease the amount of throw of thatcontrol surface. Moving the adjustable con-trol horn toward the control surface will in-crease the amount of throw.

2) Turn on the radio system, and withthe trim tabs on the transmitter in neutral, cen-ter the control surfaces by making adjust-ments to the clevises or adjustable servo con-nectors. The servo arms should be centeredalso. 3) When the elevator, rudder and aile-ron control surfaces are centered, use a rulerand check the amount of the control throw ineach surface. The control throws shouldbe measured at the widest point of eachsurface!

INITIAL FLYING/SPORT FLYING

Ailerons: 3/16” up 3/16” down.Elevator: 3/8” up 3/8” down.Rudder: 1” right 1” left.

AEROBATIC FLYING

Ailerons: 3/8” up 3/8” down.Elevator: 1” up 1” down.Rudder: 2” right 2” left.

Do not use the aerobatic settings forinitial test flying or sport flying.

should move up and the other aileron shouldmove down. If it does not, flip the servo re-versing switch on your transmitter to changethe direction.

E) From behind the airplane, look at theaileron on the right wing half. Move the aileronstick to the right. The right aileron

D) Check the throttle. Moving the throttlestick forward should open the carburetor bar-rel. If it does not, flip the servo reversing switchon your transmitter to change the direction.

If it does not, flip the servo reversing switch onyour transmitter to change the direction.

2) Check Control Surface Throw. A) The Rudder should move 3/4” left and3/4” right from center. If it moves too far, turnthe adjustable control horn out away from therudder. Do the opposite if there is not enoughthrow.

B) Both elevator halves should move 3/8” up and 3/8” down from center. If they movetoo far, turn the adjustable control horns outaway from the elevator halves. Do the oppo-site if there is not enough throw. Both elevatorhalves should also travel the same amountthroughout their total movement.


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PREFLIGHT CHECK.

1) Completely charge your transmitterand receiver batteries before your first day offlying.

2) Check every bolt and every glue jointin the PT-19 to ensure that everything is tightand well bonded.

We wish you many safe and enjoyable flightswith your PT-19.

8) Properly balance the propeller. An outof balance propeller will cause excessive vi-bration which could lead to engine and/or air-frame failure.

3) Double check the balance of the air-plane. Do this with the fuel tank empty.

4) Check the control surfaces. All shouldmove in the correct direction and not bind inany way.

5) If your radio transmitter is equippedwith dual rate switches double check that theyare on the low rate setting for your first fewflights.

6) Check to ensure the control surfacesare moving the proper amount for both lowand high rate settings.

7) Check the receiver antenna. It shouldbe fully extended and not coiled up inside thefuselage.

C) The ailerons should move 3/16” upand 3/16” down from center. If the aileronsmove too much, turn the adjustable controlhorns out away from the wing. Do the oppo-site if there is not enough throw. It is impor-tant that both ailerons move the same amount,both up and down.

D) Once the control throws and move-ments are set, tubing must be added to theclevises to ensure they do not release in theair. Cut a piece of fuel line into five 1/4” longpieces. Unsnap the clevises and slip onepiece over each clevis. Snap the clevises backin place and slide the tubing up over them.

instructions for final assembly - horizon hobby€¦ · instructions for final assembly. fairchild...

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