Hangar 9 Sundowner 36 ARF Assembly Manual Download Page 39

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Hangar 9 Sundowner 36 ARF



11. Secure the switch in the fuselage using a small

amount of silicone adhesive or two-sided tape. Position the

switch so it does not interfere with the installation of the

motor battery.

Cowling, Propeller and Spinner

Installation - EP Option

Required Parts

Fuselage assembly

Cowling

3mm washer

Fuel tubing (not included)

Propeller (not included)
Spinner assembly (not included)
3mm x 10mm socket head screw (2)

Required Tools and Adhesives

Ruler

Ball driver: 2.5mm

Hobby scissors

Rotary tool

Sanding drum

Open end wrench: 10mm Hobby knife with #11 blade



1. Check the length of your 2.5mm ball driver. If it is not

at least 4

inches (114mm), you will need to make a small

access opening in the cowl as shown in the next step.



2. (Optional) Use hobby scissors and a rotary tool to

make a 3/8-inch x 3/4-inch (9mm x 19mm) slot in the

bottom of the cowl to access the lower mounting screw if

your ball driver is less than 4

inches (114mm) in length.



3. To make the installation of the lower cowl mounting

screw easier, use a 1/2-inch (13mm) piece of fuel tubing to

keep the screw attached to the ball driver as shown.

Summary of Contents for Sundowner 36 ARF

Page 1: ...Sundowner 36 ARF Assembly Manual ...

Page 2: ...ed in the back of this manual Specifications Wingspan 51 5 in 131cm Length 44 0 in 114cm Wing Area 400 sq in 25 8 sq dm Weight 4 00 4 50 lb 1 8 2 0 kg Engine 32 36 2 stroke glow Motor Size Power 25 or Power 32 brushless Radio 4 channel minimum Servos 5 mini servos 4 with EP setup Notice All instructions warranties and other collateral documents are subject to change at the sole discretion of Horiz...

Page 3: ... 1 rudder 2 inch 51mm pushrod 2 1 aileron 3mm blind nut 4 engine mount to fuselage 3mm lock washer 4 engine mount to fuselage 3mm locknut 4 engine to mount or EP motor to standoffs 3mm washer 12 engine to mount and mount to fuselage or EP motor to standoffs 3mm washer 2 cowl mounting 3mm washer 2 wing retention 3mm x 10mm socket head screw 2 cowl mount 3mm x 10mm socket head screw 2 wing retention...

Page 4: ...y from the propeller as injury can occur Batteries Notes on Lithium Polymer Batteries When used improperly lithium polymer batteries are significantly more volatile than alkaline or Ni Cd Ni MH batteries used in RC applications Always follow the manufacturer s instructions when using and disposing of any batteries Mishandling of Li Po batteries can result in fire and rupture causing serious injury...

Page 5: ...25B APC Thin Electric Propeller 8 x 8 APC08080E 60 Amp Pro Switch Mode BEC ESC EFLA1060 2500mAh 4S 14 8V 30C Li Po 12AWG EFLB25004S30 Recommended Setup Power 32 Sport Power 32 BL Outrunner motor 770Kv EFLM54032A APC Thin Electric Propeller 12 x 8E APC12080E 60 Amp Pro Switch Mode BEC ESC EFLA1060 3200mAh 4S 14 8V 30C Li Po 12AWG EFLB32004S30 Recommended Setup Power 32 Speed Power 32 BL Outrunner m...

Page 6: ...em Use caution while working around areas where the colors overlap to prevent separating the colors Elevator and Stabilizer Installation Required Parts Fuselage Wing panel right and left Carbon wing tube Stabilizer with elevator and hinges Required Tools and Adhesives 15 minute epoxy Paper towel Rubbing alcohol Low tack tape Pin vise Drill bit 1 16 inch 1 5mm Felt tipped pen Thin CA Epoxy brush Me...

Page 7: ...xcessive trim to correct for misalignment which can reduce the performance of the model 7 Slide the stabilizer in the slot at the rear of the fuselage Position the stabilizer as far forward in the slot as possible Check to make sure the stabilizer is centered in the fuselage as shown below 8 Measure from each wing tip to each stabilizer tip Position the stabilizer so both measurements are equal as...

Page 8: ...lizer so the exposed wood can be accessed 13 Mix 1 2 ounce 15mL of 15 minute epoxy Use an epoxy brush to apply the epoxy to the exposed wood on both the top and bottom of the stabilizer Make sure not to get any epoxy on the elevator 14 Slide the stabilizer in position Use a paper towel and rubbing alcohol to remove any epoxy that oozes out when the stabilizer is positioned 15 Before the epoxy can ...

Page 9: ... hinge gap Check that the tips of the elevator and stabilizer are aligned 20 Saturate each hinge using thin CA on both the top and bottom of the hinge Allow the CA to fully cure before proceeding Note Do not use CA accelerator on the hinges The CA must be allowed time to soak into the hinge and surrounding wood to provide the best bond for the hinge 21 Once the CA has cured gently pull on the stab...

Page 10: ...rward as possible Use a felt tipped pen to transfer the outline of the fuselage to the fin 3 Remove the fin from the fuselage Use a straight edge and hobby knife with a new 11 blade to trim the covering 1 16 inch 1 5mm below the line on the fin to expose the underlying wood Note When cutting through the covering use very light pressure or a hot knife to trim the covering If the underlying wood bec...

Page 11: ...nd 11 blade to cut a groove from the hole drilled in the previous step to the bottom of the rudder for the tail gear wire 10 Test fit the tail gear wire into the rudder The wire will rest flush with the hinge line of the rudder as shown You may need to adjust the groove in the rudder to fit the tail gear wire 11 Remove the tail gear wire from the rudder Use medium grit sandpaper to roughen the tai...

Page 12: ... they are glued in position Prepare both the rudder and fin at this time 15 Place a T pin in the center of the three hinges removed in step 1 This will center the hinges evenly in the rudder and fin 16 Place the hinges in the rudder 17 Remove the tape placed on the fin and stabilizer in step 7 Slide the hinges into the slots in the rudder 18 Remove the T pins from the hinges Make sure the rudder i...

Page 13: ...to the bottom of the fuselage Make sure the mounting holes in the bracket are aligned with the fuselage centerline 23 Use a pin vise and 1 16 inch 1 5mm drill bit to drill the two holes in the fuselage for the mounting screws 24 Remove the tape and swing the bracket to the side Thread a 2mm x 8mm self tapping screw into each hole to cut threads in the surrounding wood using a 1 Phillips screwdrive...

Page 14: ...er battery Nylon clevis 2 Control horn fitting 2 Threaded control horn 2 Control horn backplate 2 2mm x 12mm machine screw 6 217 8 inch 555mm pushrod rudder 201 4 inch 514mm pushrod elevator Required Tools and Adhesives Thin CA Hobby knife with 11 blade Phillips screwdriver 1 Pencil Felt tipped pen Pin vise Ruler Drill bit 1 16 inch 1 5mm 5 64 inch 2mm Note Before starting the installation of the ...

Page 15: ... the servo 4 Test fit the elevator servo in the opening in the left hand side of the fuselage Make sure the output of the servo faces to the rear of the fuselage Use a pencil to transfer the locations of the servo mounting screws on the servo tray 5 Remove the servo from the fuselage Use a pin vise and 1 16 inch 1 5mm drill bit to drill the holes for the servo mounting screws 6 Use a 1 Phillips sc...

Page 16: ...ole enlarged in the previous step The wire will be on the top of the horn while the bend will end underneath the horn 11 Slide the pushrod into the pushrod tube near the servo Inserting the pushrod through the oval hole in the firewall will make its installation easier You will need to use a hobby knife to remove the covering at the rear of the fuselage for the pushrod to exit the left hand side o...

Page 17: ...rol horn backplate 16 With the elevator servo centered thread the nylon clevis on the pushrod wire When the clevis is attached the control surface must be centered as shown 17 Install rudder servo and the 217 8 inch 555mm rudder pushrod following steps 3 through 15 Use the rudder control horn prepared in step 2 The only difference is that the rudder servo mounts on the right hand side and the push...

Page 18: ...e washers over the holes in the cover 2 Insert the 4mm x 12mm socket head screws through the washers and the landing gear cover 3 Place the landing gear cover assembly on the landing gear Note that the landing gear will angle forward as shown in the photo The screws will fit into the mounting holes in the landing gear Note Always use threadlock on metal to metal fasteners to prevent them from vibr...

Page 19: ...the axle will fit into the notch of the wheel pant 9 Insert the threaded portion of the axle through the larger hole of the landing gear Use a 10mm open end wrench and 7mm nut driver to tighten the 4mm nut that secures the axle Leave the nut a little loose so the wheel pant can be moved easily for adjustment Note Always use threadlock on metal to metal fasteners to prevent them from vibrating loos...

Page 20: ...his time 3 Place a T pin in the center of the four hinges removed in step 6 This will center the hinges evenly in the rudder and fin 4 Place the hinges in the aileron 5 Slide the hinges into the slots in the wing panel 6 Remove the T pins from the hinges Make sure the aileron is pressed tightly against the wing panel to eliminate any hinge gap Check that the ends of the aileron have an equal gap a...

Page 21: ...block 4 Required Tools and Adhesives Drill Pin vise Pencil Trim seal tool Phillips screwdriver 1 Thin CA Ruler Hobby knife with 11 blade Side cutter String music wire Hobby scissors Medium grit sandpaper Rotary tool Sanding drum 5 minute epoxy Mixing stick Mixing cup Drill bit 1 16 inch 1 5mm 5 64 inch 2mm 1 Prepare the aileron servo by installing the rubber grommets and brass eyelets Center the s...

Page 22: ...ervo cover and hinge the remaining aileron 7 Check the fit of the aileron servo cover to the wing Note that there is a left and right cover as shown in the following photos Make sure to select the correct cover for the wing panel 8 Use a pencil and ruler to draw a line on the cover 1 4 inch 6mm from the edge of the cover The line is located on the end of the cover that has the wider area between t...

Page 23: ...d sanding drum to carefully notch the rail being careful not to sand the wing sheeting or remove too much material from the rail 13 Position the servo between the two blocks Leave a small gap between the servo and servo cover so vibrations from the airframe are not transferred directly to the servo Use a pencil to mark the locations for the two servo mounting screws on the blocks 14 Use a drill an...

Page 24: ... a pencil to transfer the four positions for the servo cover mounting screws onto the cover rails 19 Remove the cover and servo from the wing Use a pin vise and 1 16 inch 1 5mm drill bit to drill the four holes for the cover mounting screws Make sure not to accidentally drill through the top of the wing 20 Use a 1 Phillips screwdriver to run a 2mm x 8mm self tapping screw in each of the holes to c...

Page 25: ...f the radio system at this time to avoid running the battery down Aileron Linkage Installation Required Parts Nylon clevis 2 Receiver battery Transmitter Receiver 2 inch 52mm pushrod 2 2mm x 12mm machine screw 4 Nylon control horn with backplate 2 Wing panel with aileron right and left Required Tools and Adhesives Phillips screwdriver 1 Felt tipped pen Pin vise Drill bit 5 64 inch 2mm Ruler 1 Use ...

Page 26: ...rn 5 Insert the Z bend of the 2 inch 52mm linkage in the hole of the servo arm that was enlarged in the previous section of this manual 6 With the radio on and the aileron servo centered thread the nylon clevis on the pushrod Thread the clevis on enough so the aileron is centered when the clevis is connected to the outer hole of the control horn shown below Drawing not to scale Attach clevis 7 Che...

Page 27: ...d engine mount template The template will fit into the recess of the firewall If not lightly sand the edges of the template so it fits into position 2 Use a drill and 1 8 inch 3mm drill bit to drill the four holes for mounting the engine Use the inner set of holes as shown below 3 Use a drill and 3 16 inch 5mm drill bit to enlarge the holes in the firewall 4 Note there is a slight bevel where the ...

Page 28: ... rails on the firewall as shown Use the four 3mm x 20mm machine screws to hold the mount in position Do not tighten the screws as the mount will need to be adjusted for your particular engine 10 Place the engine between the mount and slide the nylon mounting beams tight against the engine case Slide the engine and mount as far to the left as possible as this will center the propeller shaft with th...

Page 29: ...tery 3mm x 4mm socket head screw 137 8 inch 352mm throttle pushrod 83 4 inch 220mm pushrod tube Plywood servo tray support 2 Required Tools and Adhesives Pin vise Square Medium CA Thin CA Threadlock Pencil Medium grit sandpaper Phillips screwdriver 1 Ruler Side cutters Pin vise Hex wrench 2 5mm Drill bit 1 16 inch 1 5mm 7 64 inch 2 5mm 1 Use medium CA glue to assemble the throttle servo tray using...

Page 30: ...to metal fasteners to prevent them from vibrating loose 8 Attach the pushrod connector to the servo horn using a 1 5mm knurled nut 3mm x 4mm socket head machine screw and 1 5mm washer Position the connector so it is 1 2 inch 13mm from the center of the horn Use side cutters to remove any unused arms from the horn so they don t interfere with the operation of the throttle servo 9 Use the transmitte...

Page 31: ...ides an area for the CA to adhere to when the tube is glued in place 14 Slide the tube into the fuselage with the 11 2 inch 38mm first Note the position of the tube inside the fuselage as it passes through the formers Position the tube so 31 2 inch 89mm of the tube is exposed forward of the fuselage as shown 15 Apply 2 3 drops of medium CA where the pushrod tube passes through the formers to secur...

Page 32: ...not included Fuel tubing not included Aluminum tube 2 inch 51mm Aluminum tube 23 4 inch 70mm Fuel tubing 41 2 inch 115mm 3mm x 30mm self tapping screw Tools and Adhesives Ruler Phillips screwdriver 1 Razor saw Medium CA Hobby knife with 11 blade 1 Remove the material so two of the three holes in the stopper pass completely through as well as the center hole for the screw that will secure the stopp...

Page 33: ... to the straight tube Use a hobby knife to trim the length of the tube to a length of 23 4 inch 70mm as shown in the photo below Note Check the ends of the aluminum tubes for sharp edges If any sharp edges are found remove them before installing the fuel tubing 7 Attach the clunk to the end of the tubing as shown 8 Insert the stopper assembly into the fuel tank Make sure the vent line faces to the...

Page 34: ...hole in the firewall Slide the tank in only as far is it will easily slide Do not force the fuel tank forward and damage the fuel lines 12 Use a razor saw to cut two mixing sticks to a length of 3 inches 76mm Use these and medium CA to secure the tank in the fuselage Cowling and Muffler Installation Glow Option Required Parts Fuselage assembly Muffler with hardware Cowling 3mm washer 2 Propeller n...

Page 35: ...line from the clunk to the carburetor Leave the line long so it can be removed through the cowl using hemostats 5 Attach the cowl to the fuselage using two 3mm x 10mm socket head machine screws and two 3mm washers The lower screw is installed from the inside of the cowl while the upper screw is installed inside the fuselage Use a 2 5mm hex wrench to tighten the screws 6 Attach the muffler to the e...

Page 36: ...able depending on your switch selection Make sure to route the leads from the switch where they can be accessed for the connections to the receiver and receiver battery 2 Connect the leads from the rudder elevator and throttle servos to the receiver Also connect the switch harness and extensions for the ailerons at this time 3 Use hook and loop tape to secure the receiver in the fuselage Make sure...

Page 37: ...t template The template will fit into the recess of the firewall If not lightly sand the edges of the template so it fits into position 2 Use a drill and 1 8 inch 3mm drill bit to drill the four holes for mounting the engine Use the inner set of holes for the Power 25 the outer set of holes for the Power 32 Note The following steps will show the recommended Power 32 motor installation The Power 25...

Page 38: ...crews from the inside of the fuselage while tightening the nuts with a 5 5mm nut driver 9 Connect the leads from the motor to the speed control If you are using the recommended equipment matching the colored wires between the speed control and motor will result in the motor rotating in the correct direction 10 Use hook and loop tape not included to secure the speed control inside the fuselage Make...

Page 39: ...ll driver 2 5mm Ball driver 2 5mm Hobby scissors Rotary tool Sanding drum Open end wrench 10mm Hobby knife with 11 blade 1 Check the length of your 2 5mm ball driver If it is not at least 41 2 inches 114mm you will need to make a small access opening in the cowl as shown in the next step 2 Optional Use hobby scissors and a rotary tool to make a 3 8 inch x 3 4 inch 9mm x 19mm slot in the bottom of ...

Page 40: ...ller can transmit vibrations into the motor or airframe causing damage or even failure of these components 6 Use a 3 32 inch hex wrench to tighten the screw securing the spinner cone to the backplate assembly Receiver and Motor Battery Installation EP Option Required Parts Fuselage assembly Receiver battery Receiver Switch harness with hardware Hook and loop tape not included Hook and loop strap n...

Page 41: ...tape along the bottom of the battery to keep it from sliding on the battery tray Final Assembly Required Parts Fuselage assembly Wing panels right and left Canopy 3mm washer 2 Carbon wing tube 3mm x 10mm socket head screw 2 Required Tools and Adhesives Ball driver 2 5mm Hobby knife with 11 blade Note The ailerons can be connected to the receiver using a Y harness utilizing the single aileron chann...

Page 42: ...will fit tight against the fuselage when installed 4 Slide the remaining wing panel into position against the fuselage 5 Connect the leads from the aileron servos to the lead or Y harness from the aileron ports of the receiver 6 Use two 3mm x 10mm socket head screws and two 3mm washers to secure the wings to the fuselage Use a 2 5mm hex wrench to tighten the bolts securing the wing 7 Complete the ...

Page 43: ... to correct the Center of Gravity if it is off Mark the location of the battery on the battery tray using a felt tipped pen so it can be returned to this position if it is removed from your model After the first flights the CG position can be adjusted for your personal preference Control Throws 1 Turn on the transmitter and receiver of your model Check the movement of the rudder using the transmit...

Page 44: ...successful with the Sundowner 36 You can slow the airplane nicely for landing on your test flight take some time before you have to land to slow the airplane at 2 3 mistakes high to get the feel of the airplane as it approaches the stall The Sundowner 36 is designed to provide you with an exhilarating flight envelope from slow to high speed This airplane is designed to be an all around aerobatic b...

Page 45: ...ser Purchaser and is not transferable REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER This warranty covers only those Products purchased from an authorized Horizon dealer Third party transactions are not covered by this warranty Proof of purchase is required for all warranty claims b Limitations HORIZON MAKES NO WARRANTY OR REPRESENTATION EXPRESS OR I...

Page 46: ... been met your Product will be repaired or replaced free of charge Repair or replacement decisions are at the sole discretion of Horizon Non Warranty Repairs Should your repair not be covered by warranty the repair will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50 of the retail purchase cost By submitting the item for repai...

Page 47: ... comparable standards B RADIO CONTROL RC 1 All pilots shall avoid flying directly over unprotected people vessels vehicles or structures and shall avoid endangerment of life and property of others 2 A successful radio equipment ground range check in accordance with manufacturer s recommendations will be completed before the first flight of a new or repaired model aircraft 3 At all flying sites a s...

Page 48: ...ed 12 2010 2010 Horizon Hobby Inc horizonhobby com Hangar9 com The Spektrum trademark is used with permission of Bachmann Industries Inc All other marks are trademarks or registered trademarks of Horizon Hobby Inc ...

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