DUAL ACE - Horizon Hobby

DUAL ACE.Instruction Manual.C/A glue attach.Control Horn.2MM x 20mm.3MM x 30mm.Mounting Screws.Cut.Mounting Plate.4) Using a 1.5mm drill bit and the controlhorns as a guide, drill the mounting holesthrough the aileron halves.5) Mount the control horns by inserting thebolts through the control horn bases andaileron halves, then into the mountingbackplates. Do not overtighten the nuts or thebackplates may crush the wood.M2 clevis.M2 lock nut.Snap keeper.6)Thread one nylon adjustable control hornon to each aileron control rod. Thread thehorns on until they are flush with the ends ofthe control rods.Repeat the procedure for the otheraileron servo.ATTACHMENT ENGINE MOUNTINGBOX.See pictures below.Push.Clevis.Pen.Aileron torque rod.9

DUAL ACE.Instruction Manual.White glue orepoxy glue.FUEL TANK.INSTALLING THE STOPPER ASSEMBLY.4) Carefully heat the vent tube using aheat gun or lighter to permanently set theangle of the tube.Vent tube.Fuel line.Clunk.1) Using a modeling knife, carefully cutoff the rear portion of one of the two nylon tubesleaving 1/2” protruding from the rear of thestopper. This will be the fuel pick up tube.2) Using a modeling knife, cut one lengthof silicon fuel line (not included) to 2-1/4” long.Connect one end of the line to the weightedfuel pickup and the other end to the nylon pickup tube.3) Carefully bend the second nylon tubeup at a 45º angle. This tube is the vent tube.When the stopper assembly is installed inthe tank, the top of the vent tube should restjust below the top surface of the tank. It shouldnot touch the top of the tank.5) Test fit the stopper assembly into thetank. It may be necessary to remove some ofthe flashing around the tank opening using amodeling knife. If flashing is present, makesure none falls into the tank.6) With the stopper assembly in place,the weighted pick up should rest about 3/8”away from the rear of the tank and move freelyinside the tank. The top of the vent tube shouldrest just below the top of the tank. It shouldnot touch the top of the tank.7) When satisfied with the alignment ofthe stopper assembly tighten the 3mm x 20mmmachine screw until the rubber stopper expands and seals the tank opening. Do notovertighten the assembly as this could causethe tank to split.10

DUAL ACE.Instruction Manual.Blow through one of the lines to ensure the fuel lines have not becomekinked inside the fuel tank compartment.Air should flow through easily.INSTALLING THROTTLE SERVOS.Install the rubber grommets and brasscollets onto the throttle servo. Test fit the servointo the throttle servo mount.Install the servo into the servo tray.Attach the silicone fuel and pressure pipesto the tank. The lower pipe is the ‘feed’ and theupper two the ‘pressure and fill’. The fill pipe isthe next pipe.You should mark which tube is thevent and which is the fuel pick up whenyou attach fuel tubing to the tubes in thestopper. Once the tank is installed insidethe fuselage, it may be difficult to determinewhich is which.Because the size of servos differ, youmay need to adjust the size of theprecut opening in the mount. The notchin the sides of the mount allow the servolead to pass through.Secure the servos with the screws provided from your radio system.Fuel tank.Vent tube.Fuel line.11

DUAL ACE.Instruction Manual.5) Bolt the engine to the engine mountusing the four machine screws. Doublecheek that all the screws are tight beforeproceeding.6) Attach the Z-Bend in the pushrod wireto the throttle arm on the carburetor. You willneed to remove the throttle arm from the carburetor to be able to attach the Z-bend. Whencomplete, reattach the throttle arm to the carburetor.Repeat the procedure for the otherservo.MOUNTING THE ENGINE.1) Install the pushrod housing through thepredrilled hole in the firewall and into the servocompartment. The pushrod housing shouldprotrude 1/4" out past the front of the firewall.Make a Z-Bend 1/4" from one end of the plainwire pushrod.2) Place your engine onto the enginemount. Adjust the engine is centered of theedges of the engine case.4 X 30mm.Pushrod wire.3) When you are satisfied with the alignment, mark the locations of the enginemounting.11.2cm.4) Remove the engine. Using an drill bit,drill the mounting holes through the enginemount at the four locations marked.4x30mm(4pcs).Repeat the procedure for the otherengine.12

DUAL ACE.Instruction Manual.MOUNTING THE NACELLE.1) Put the fiberglass nacelle over the engine and line up the back edge of the nacellewith the marks you made on the wing then trimand cut.Trim and cut.3 x 10mm.3) Put the nacelle back over the engineand secure it in place using thirty-two 3mm x10mm wood screws. See picture above.Trim and cut.4) Install the muffler and muffler extensiononto the engine and make the cutout in thenacelle for muffler clearance. Connect the fueland pressure lines to the carburetor, mufflerand fuel filler valve.2) While keeping the back edge of thenacelle flush with the marks, align the front ofthe nacelle with the crankshaft of the engine.The front of the nacelle should be positionedso the crankshaft is in nearly the middle ofthe nacelle opening. Use the spinner backplateas a guide. Hold the nacelle firmly in place using pieces of masking tape.Carburetor.Because of the diameter of the nacelle, it may be necessary to use a needlevalve extension 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.13

DUAL ACE.Repeat the procedure for the othernacelle.Instruction Manual.MAIN LANDING GEARINSTALLATION.INSTALLING THE MAIN GEAR WIRES.INSTALLING THE SPINNER.Install the spinner backplate, propellerand spinner cone. The spinner cone is held inplace using two 3mm x 12mm wood screws(spinner is not included).3 x 10mm.The propeller should not touch anypart of the spinner cone. If it does, use asharp modeling knife and carefully trimaway the spinner cone where the propeller comes in contact with it.1) Using a modeling knife, remove the covering from over the two main gear mountingslots located in the bottom of the wing. Oneslot is located in each wing half.Mounting slot.Remove covering.2) Insert the 90º bend of one main gearwire into the predrilled hole in one mountingslot.14

DUAL ACE.Instruction Manual.INSTALLING THE MAIN GEAR WHEELS.Landing gear wire.1) Slide one wheel collar with 3mm x6mm set screw onto each axle. Push thewheel collars on as far as they will go andtighten the set screws.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 located equaldistance from the inside and outsideends of the wire.Be careful not to overtighten the setscrews. Overtightening may cause thethreads to strip.2) Slide one 60mm diameter wheel ontoeach axle and push them up against the wheelcollars. Slide the remaining wheel collars with3mm x 6mm set screws onto the axles. Pushthem up against the wheels and tighten theset screws. The wheels should spin free andnot bind in any way. If they do bind, loosen theset screws in the outer wheel collars and movethe collars out a small amount. Retighten theset screws.Pen.4) Using the two landing gear straps as aguide, mark the locations of the four 3mm x10mm mounting screws onto the wing surface.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!Repeat the procedure for the othermain gear wheel.NOSE GEAR INSTALLATION.PARTS REQUIRED3mm X 10mm.{1}{1}{1}{1}{2}Nose gear.Steering arm.Connector.Wheel.Collar.Repeat the procedure for the othermain gear wire.15

DUAL ACE.Instruction Manual.Installing the hard wood block.C/A glue.Installing steering arm as below.Adjustable connector.INSTALLING THE COWLING.Steering arm.Adjust the nose gear steering arm until thearm is parallel with the fire wall.Install the pushrod wire as shown.Slide the fiberglass cowl over the engineand line up the back edge of the cowl with themarks you made on the fuselage then trim andcut.3mm X 10mm.Adjustableconnector.INSTALLING THE NOSE GEAR WHEEL.Pushrod wireSlide one 60mm diameter wheel collaronto the axle and tighten. Slide the nosewheel on and push it up against the wheelcollar. Slide the remaining wheel collar onand push it up against the wheel and tightenthe set screw. The wheels should spin freeand not bind in any way.16Correct the cow at right possition then secure it in place using four 3mm x 10mm woodscrews. See picture below.

DUAL ACE.Instruction Manual.3mm X 10mm(4pcs).4) With the stabilizer held firmly in place,use a pen and draw lines onto the stabilizerwhere it and the fuselage sides meet. Do thison both the right and left sides and top andbottom of the stabilizer.HORIZONTAL STABILIZER.1) Using a ruler and a pen, locate thecenterline of the horizontal stabilizer, at the trailing 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.Center line.Pen.5) Remove the stabilizer. Using the linesyou just drew as a guide, carefully remove thecovering from between them using a modeling knife.2)Using a modeling knife, carefully removethe covering at mounting slot of horizontal stabilizer ( both side of fuselage).Remove covering.3) Slide the stabilizer into place in the precut slot in the rear of the fuselage. The stabilizer should be pushed firmly against the frontof the slot.Remove covering.When cutting through the coveringto remove it, cut with only enough pressure to only cut through the covering itself. Cutting into the balsa structure mayweaken it.17

DUAL ACE.Instruction Manual.6) Using a modeling knife, carefully remove the covering that overlaps the stabilizermounting platform sides in the fuselage. Remove the covering from both the top and thebottom of the platform sides.7) When you are sure that everything isaligned 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 measurements once more before the epoxy cures.Hold the stabilizer in place with T-pins or masking tape and remove any excess epoxy usinga paper towel and rubbing alcohol.8) After the epoxy has fully cured, remove 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.VERTICAL STABILIZER INSTALLATION.1) Slide the vertical stabilizer into the slotof the fuselage. The bottom edge of the stabilizer should also be firmly pushed against thetop of the horizontal stabilizer.2) 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.Remove covering.Pen.Wood filler piece.Covered woodfiller piece.183) Remove the stabilizer. Using a modeling 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.

DUAL ACE.Instruction Manual.Remove covering.Remove covering.When cutting through the covering toremove it, cut with only enough pressureto only cut through the covering itself. Cutting into the balsa structure may weakenit.4) Slide the vertical stabilizer back inplace. Using a triangle, check to ensure thatthe vertical stabilizer is aligned 90º to the horizontal stabilizer.HorizontalStabilizer.90ºC/A glue.VerticalStabilizer.5) 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 realign. 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.TAIL FAIRING - CONTROL HORNINSTALLATION.See pictures below:2 x 8mm.19

DUAL ACE.Instruction Manual.5) Position the rudder control horn on theleft side of the airplane. Mount the control hornparallel with the horizontal stabilizer.Rudder control horn.1) Locate the three nylon control horns,three nylon control horn backplates and sixmachine screws.Elevatorcontrol horn.2) Position the elevator horn on the bothside of elevator. The clevis attach- ment holesshould be positioned over the hinge line.3mmx30mm.2mmx20mm.M3 lock nut.ELEVATOR-RUDDER PUSHRODINSTALLATION.1) Elevator and rudder pushrods assemblyfollow pictures below.M2 lock nut.C/A glue attach.Control Horn.2MM x 20mm.3MM x 30mm.Mounting Screws.Mounting Plate.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 thebolts through the control horn bases andelevator halves, then into the mountingbackplates. Do not overtighten the nuts or thebackplates may crush the wood.20Pushrod.Control horn.2) Connect the elevator and rudder servosto your radio’s receiver and turn on the system. Set the trim tabs on the transmitter toneutral and center the servo arms. The elevator and rudder servo arms should be perpendicular to the servos.3) One at a time, hold the pushrods in position over the respective servos to check forproper servo direction. If any servo turns inthe wrong direction, switch your radio’s reversing switches as necessary to achieve thecorrect direction.

DUAL ACE.Instruction STALLING THE FUSELAGESERVOS.INSTALLING THE SWITCH.Install the switch into the precut hole atfuselage slide. Use the two screws providedwith the switch to secure it in place. Drill two3/32” holes through the tray for the screws topass through.Remove covering.Install servos arm to servos. Notice the position of the servo arms on the servos. Seepicture below.Remove covering.Switch.21

DUAL ACE.Instruction Manual.Switch.Receiver.Battery.INSTALLING THE RECEIVER AND BATTERY.1) Plug the seven servo leads and theswitch lead into the receiver. Plug the batterypack lead into the switch also.ATTACHMENT WING-FUSELAGE.Attach the aluminium tube into fuselage.2) Wrap the receiver and battery pack inthe protective foam rubber to protect themfrom vibration.When balancing the airplane you mayneed to move the battery or receiver forward or after to achieve proper balance.3) Route the antenna in the antenna tubeinside the fuselage and secure it to the bottom of fuselage using a plastic tape. See picture below.Antenna.Antenna tube.22Insert two wing panels as pictures below:

DUAL ACE.Instruction Manual.CONTROL THROWS.Wing bolts.1) We highly recommend setting up theDUAL ACE using the control throws listed atright. We have listed control throws for bothLow Rate (initial test flying/sport flying) andHigh Rate (aerobatic flying).2) Turn on the radio system, and with thetrim tabs on the transmitter in neutral, centerthe control surfaces by making adjustmentsto the clevises or adjustable servo connectors.The servo arms should be centered also.3) When the elevator, rudder and aileroncontrol surfaces are centered, use a ruler andcheck the amount of the control throw in eachsurface. The control throws should bemeasured at the widest point of each surface!INITIAL FLYING/SPORT FLYINGAilerons:Elevator:Rudder:3/16” up5/16” up3/4” right3/16” down5/16” down3/4” leftAEROBATIC FLYINGBALANCING.1) It is critical that your airplane be balanced correctly. Improper balance will causeyour plane to lose control and crash. The center of gravity is located 80-90mm back fromthe leading edge of the wing, measured at thefuselage.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 receiver forward orif this is not possible, stick weight ontothe firewall or use a brass heavy hub spinnerhub, 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.Ailerons:Elevator:Rudder:3/8” up5/8” up1-1/4” right3/8” down5/8”down1-1/4” leftDo not use the aerobatic settings for initialtest flying or sport flying.4) By moving the position of the adjustable control horn out from the control surface,you will decrease the amount of throw of thatcontrol surface. Moving the adjustable control horn toward the control surface will increase the amount of throw.FLIGHT PREPARATION.A) Check the operation and direction ofthe elevator, rudder, ailerons and throttle.B) Plug in your radio system per themanufacturer's instructions and turn everything on.23

DUAL ACE.C) Check the elevator first. Pull backon the elevator stick. The elevator halvesshould move up. If it they do not, flip the servoreversing switch on your transmitter to changethe direction.D) Check the rudder. Looking from behindthe airplane, move the rudder stick to the right.The rudder should move to the right. If it doesnot, flip the servo reversing switch on yourtransmitter to change the direction.E) Check the throttle. Moving the throttlestick forward should open the carburetor barrel. If it does not, flip the servo reversing switchon your transmitter to change the direction.F) From behind the airplane, look at theaileron on the right wing half. Move the aileronstick to the right. The right aileron should moveup and the other aileron should move down. Ifit does not, flip the servo reversing switch onyour transmitter to change the direction.PREFLIGHT CHECK.1) Completely cha

DUAL ACE. Instruction Manual. 2 INTRODUCTION. Thank you for choosing the DUAL ACE ARTF by SEAGULL MODELS. The DUAL ACE was designed with the intermediate/advanced sport flyer in mind. It is a airplane which is easy to fly and quick to assemble. The airframe is conventionally built using balsa, plywood to make it stronger than