Hangar 9 Sukhoi SU-31 Instruction Manual Download Page 22 | Manualshive

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22

Section 8: Installing the Rudder, Control Horns,

and Linkages

Parts Needed

• Rudder
• Fuselage
• Control Horn (DLRO1B) (2)
• 4-40 Ball Links (DLR87) (2)
• 5" 4-40 Pro-Links (HAN3557) (2)

Tools and Adhesives Needed

• 8-32 Tap and Drill Bit (DUB363)
• Drill
• Drill Bit: 1/8"
• Phillips screwdriver
• Straight screwdriver
• 30-minute epoxy
• Rubbing alcohol
• Paper towels
• Ruler

Step 1.

Mark the position for the rudder control horn with a

felt-tipped pen. The correct location is 3/4" up from the bottom
of the rudder and 1/4" rearward from the edge of the rudder bevel.

Step 2.

Using the drill bit supplied with your 8-32 tap or a

1/8" drill bit, carefully drill a hole through the rudder perpendicular
(90°) to the rudder centerline at the marked position. Be especially
careful when penetrating through the backside of the rudder.

Step 3.

Using an 8-32 tap, thread the hole you just drilled in

the rudder.

Step 4.

Mix a small amount of 30-minute epoxy and lightly

coat the center of the threaded portion of the 4" long 8-32 bolt
included with the swivel control horn package. Thread the bolt
into the tapped hole in the rudder until 1" of thread is exposed
on the opposite side.

Step 5.

Using a Moto-tool and a cut-off wheel, cut the bolt on

the side with the head so that 1" of thread is exposed.

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Summary of Contents for Sukhoi SU-31

Page 1: ...rea 1810 sq in 116 7 sq dm Weight 22 5 25 5 lb 10 2 11 6 kg Recommended Engines 60 80cc WE GET PEOPLE FLYING TM Superior controllability and aerobatic flight characteristics Lightweight construction Designed by veteran TOC competitor Mike McConville 90 built 1 3 scale ARF Plug in wings for easy transport and field assembly ...

Page 2: ......

Page 3: ...kages 16 Section 6 Installing the Rudder and Elevator Servos 18 Section 7 Installing the Elevator Control Horns and Linkages 19 Section 8 Installing the Rudder Control Horns and Linkages 22 Section 9 Attaching the Tail Wheel 24 Section 10 Installing the Landing Gear and Wheelpants 25 Section 11 Installing the Receiver Battery and Fuel Tank 28 Section 12 Mounting the Engine and Cowl 30 Section 13 H...

Page 4: ... The 1 3 Scale Sukhoi Su 31 does not include hardware Many experienced giant scale pilots have specific hardware preferences and can individually choose the components they prefer Hangar 9 offers an optional Hardware Package HAN1220 JR HAN1221 FUT that includes the hardware that our staff regularly uses and recommends Throughout the manual the above hardware will be used during the assembly proces...

Page 5: ...er battery pack or larger Servos with 80 oz in of torque minimum elevator and rudder JR8101 4721 2721 or 8411 or equivalent 4 Servos with 60 oz in of torque aileron 4 Servo for throttle JR537 1 Y Harnesses JRP133 3 24 Servo Extension JRPA102 2 18 Servo Extension JRPA099 5 6 Servo Extension JRPA095 2 Note Requires one reversed servo for elevator Recommended JR Systems JR XP662 JR X 378 JR XP8103 JR...

Page 6: ...er 30 minute epoxy 6 minute epoxy Silicon glue 41 4 Spinner Tru turn TRU4252MZ Spinner Adapter Kit TRU0127 Propeller refer to recommendations listed in your engine s operating instructions 2 gas compatible tubing Cup engine mount B B 6202 G 62 only Sandpaper coarse Radio packing foam Antenna tube Canopy glue Threadlock Electrical tape Masking tape 1 8 light plywood 1 4 20x11 2 socket head screws G...

Page 7: ...nts HAN1286 HAN1220 JR HAN1221 Futaba 31 2 Pro Lite wheels HAN308 41 2 4 40 Threaded Pro Links HAN3556 4 5 4 40 Thread Pro Links HAN3557 4 32 oz Fuel Tank DUB690 Tail Wheel Assembly with Hardware OHI130 4 40 Ball Links DLR87 9 8 32 Swivel Control Horns DLR01B 8 3 16 Main Axles DUB249 Super Hinge Points ROB309 24 4 40 3 D Arm 11 4 long JR Version HAN3578 2 4 40 HD Arm 1 long JR Version HAN3574 6 B ...

Page 8: ...ng panel and slide the wing in place on the fuselage Reach inside the fuselage and hold the wing alignment tube blocks while inserting the wing half Make sure the wing panel alignment tubes slide into the holes in the fuselage Note The fit may be tight use caution when inserting the wing panels onto the wing tube and fuselage Step 4 Carefully slide the other wing panel onto the wing tube that proj...

Page 9: ...pecial steps that need to be taken Step 1 Select two sets of servos and Hangar 9 1 arms that have the same neutral All servos will have a slightly different neutral If you are using Hangar 9 metal arms they don t all orient the same i e the splines are not oriented the same relative to the arm First choose one servo and arm plug it into the aileron channel on your receiver through the Y connection...

Page 10: ...adio s instructions Note If a non computer radio is used three Y harnesses are required Plug one Y harness into the aileron port of your receiver Plug each wings servos into a Y harness and then plug those into the Y harness connected to the receiver Step 5 With the servos in position mark the four locations for the mounting screws Remove the servo and drill a 1 16 pilot hole in the servo rails Se...

Page 11: ...aligned with the outer hole on the servo arm to mark the aileron at the top of the bevel Step 3 Measure 1 4 rearward from the marks above 90 degees to the hinge line and make another mark using a pen This is the position for the control horn Remove the aileron from the wing and also the hinge points Step 4 The hole for the control horn is drilled at 90 degrees to the centerline of the aileron as s...

Page 12: ...nute epoxy and lightly coat the inside of the tapped holes and the 8 32 x 2 screws From the top of the aileron install the 8 32 x 2 screw into the tapped holes and securely tighten Wipe away any excess epoxy with rubbing alcohol and a paper towel Step 7 Screw the A nuts in place as shown Allow the epoxy to fully cure Step 8 Repeat Steps 1 through 7 for the opposite aileron ...

Page 13: ...Step 2 Mix 1 ounce of 30 minute epoxy Using a glue syringe or toothpick place a sufficient amount of 30 minute epoxy into one of the hinge pockets on the wing s trailing edge Install one of the hinge points until the hinge point center is flush with the trailing edge of the wing Some epoxy should ooze out of the pocket as the hinge is installed If not remove the hinge and apply more epoxy Wipe awa...

Page 14: ...7 When the epoxy has fully cured move each control surface throughout its travel range several times to break away any epoxy in the hinge Be sure to deflect the surface fully FAST FACTS Sealing the Hinge Gaps It s vital that the aileron and elevator hinge lines be sealed airtight to prevent flutter Sealing the hinge line has several advantages A sealed hinge line gives a greater control response f...

Page 15: ... piece of the UltraCote Place the folded crease side to the center of the hinge line on the bottom of one wing half Deflect the aileron full up and using a straight edge as shown hold one side of the covering in place while ironing down the opposite side with a sealing iron We recommend setting the iron temperature to 320 for this operation Step 13 Place the straight edge over the hinge line cover...

Page 16: ...e servo arm when the aileron is neutral and the servo arm is centered Note Hangar 9 Titanium Pro Links feature right hand threads on one end and left hand threads on the other allowing for easy accurate adjustment without disconnecting the linkages Consistently putting the right hand threads toward the servo arms on all servos will prevent you from getting confused as to which way to turn the Pro ...

Page 17: ...tick to full right Hold it there the easiest way is to have your transmitter set to PCM hold and then turn off the transmitter Hold the clevis on the outboard servo up to the horn and note how the holes align Turn the transmitter on and hold full left aileron and again note how the holes align The holes have to line up nearly perfectly If they don t line up perfectly adjust the horn length distanc...

Page 18: ...connection Non Computer Radio Step 2a If using a non computer radio install four 18 servo extensions one on each servo Tape and tie a knot at each connector to prevent inadvertent disconnection Install one side only of the two Y harnesses to two of the servos also tying knots to prevent disconnection The other two servos will be hooked up to the Y harness when installed in the airplane One elevato...

Page 19: ...ntrol horn installation Step 1 To properly locate the position of the control horn on the bottom of the elevator measure inward 11 8 from the root and rearward 1 4 from the top of the bevel Mark this position on both elevators Step 2 The hole for the control horn is drilled at 90 degrees to the centerline of the elevator as shown in the illustration below Drill strait through the elevators using t...

Page 20: ...eal the elevator hinge gaps Use the provided 3 x 36 Midnight Blue UltraCote strip cut in half for the bottom of the elevators Note You may need to drill out the inboard hinge location in the elevators with a 5 32 drill bit to allow the hinge to seat correctly Note Since the holes in the long stabilizer tube are not drilled or tapped you will have to make sure this is done so the stabilizers can be...

Page 21: ... the hole Step 10 Remove the stabilizers and drill and tap the long tail tube Reinstall the stabilizers and thread the 4 40 cap screws and split washers into place securing the stabilizers to the fuselage Caution Check the security of the screws before each flight Step 11 Install the molded swivel clevis onto the control horn screws until the bottom of the clevis is 5 8 from the elevator Step 12 S...

Page 22: ... bevel Step 2 Using the drill bit supplied with your 8 32 tap or a 1 8 drill bit carefully drill a hole through the rudder perpendicular 90 to the rudder centerline at the marked position Be especially careful when penetrating through the backside of the rudder Step 3 Using an 8 32 tap thread the hole you just drilled in the rudder Step 4 Mix a small amount of 30 minute epoxy and lightly coat the ...

Page 23: ...ep 9 Screw a 4 40 ball link five to six turns onto a 5 long 4 40 Pro Link Screw the opposite end of the linkage into the swivel control horn that was installed in Step 7 Adjust the length until the hole in the ball link lines up with the outer hole in the servo arm when the rudder is in neutral and the arm is centered Step 10 Using the 4 40 screws and nuts included in the swivel control horn packa...

Page 24: ... fuselage Using a felt tipped pen mark the position for the mounting screws through the tail wheel bracket Step 3 Drill 7 64 pilot holes at the previously marked positions Step 4 Using two 6 x 3 4 sheet metal screws secure the tail wheel bracket in place Note that the hardwood plate is positioned in the rear of the fuselage allowing these screws to be firmly tightened Hint Remove the 6 x 3 4 screw...

Page 25: ...e in place using an adjustable wrench Note A plywood mounting plate is glued in place inside the wheelpant for mounting it to the landing gear Step 2 Place a wheel centered in the wheelpant and mark the edge of the wheelpant at the axle hole Mark the position on both wheelpants with a felt tipped pen being sure to mark the same side that the plywood plate is installed Step 3 Place the wheelpant on...

Page 26: ...ing holes through the landing gear on the wheelpants using a felt tipped pen Step 6 Remove the wheelpants and carefully drill a 9 64 hole through the wheelpants at the mark made in the previous step Step 7 Install the 4 40 blind nut from inside the wheelpants Later we will fully seat the blind nut into the plywood when installing the wheelpants onto the landing gear Step 8 Install the following it...

Page 27: ...rely tighten the screws to properly seat the blind nuts Step 10 Center the wheels in the wheelpants and tighten the collars against the wheels so that they are held in place Use threadlock on the wheel collar set screws Step 11 Remove the landing gear hatch and mount the landing gear to the fuselage using four 10 32 x 1 bolts and locking nuts Step 12 Reinstall the landing gear hatch ...

Page 28: ... aft of the wing tube The lighter Zenoah G 62 requires the battery be mounted in the nose Using 6 minute epoxy attach the battery tray to the fuselage Our model uses the battery location for the GT 80 Step 3 Securely attach the battery to the battery tray Be sure to place RC foam under the battery to isolate vibration Step 4 Using 6 minute epoxy fasten the receiver mount in place just aft of the r...

Page 29: ... the tank Mount the gas tank just ahead of the wing tube close to the center of gravity Be sure to use a gas compatible stopper and tubing Place foam on the floor of the tank compartment Secure the tank in place by wrapping rubber bands or Velcro straps around the tank and tank floor Cup hooks can be used to hook the rubber bands to the tank floor ...

Page 30: ... hardware 2 of Gas Compatible Fuel Tubing DUB800 Throttle servo 18 Servo Extension JRPA009 4 40 x 6 threaded choke rod 1 8 plywood Fuel Filler HAN115 Kill Switch ZEN20000 6 4 40 Rod Threaded DUB802 4 40 Solder Link DUB604 4 40 Ball Links ROC87 2 Tools and Adhesives Needed Moto tool w cut off wheel and drum sander Drill Drill Bit 5 16 Hobby knife w 11 blade Phillips screwdriver Scissors 6 minute ep...

Page 31: ... with the cup mount Step 2 Install the adaptor plate and engine to the firewall using 1 4 20 x 11 2 socket head cap screws not included split washers and blind nuts Step 3 Mount the throttle servo on the bottom of the engine box 1 2 from the right side as shown in the photo Mount the servo using the hardware included with the servo Step 4 Using a 4 40 threaded rod and two ball links make up the th...

Page 32: ...h a cut off wheel and drum sander cut air outlets in the bottom of the cowl as shown It may also be necessary to cut out an area for the mufflers to exit depending on the mufflers and engine you use Step 7 Temporarily install the canopy hatch and trial fit the Sukhoi cowl in place Mark the location of the four mounting screws and use a 1 8 drill bit to drill the holes for the 4 40 x 3 4 socket hea...

Page 33: ...rom the decal sheet and install it to the dash area of the hatch Step 3 Install a 1 3 scale pilot figure to the canopy hatch using Shoe Goo or a similar adhesive that will remain flexible Let the glue dry before securing the canopy in place Step 4 Secure the canopy to the hatch using Formula 560 canopy glue and the screws provided Hold the edges of the canopy in place with masking tape until the g...

Page 34: ...ntrol direction or a reversed servo can be used here Special attention must be taken with the rudder servos so that they don t fight each other throughout the rudder travel This is caused by non symmetrical pushrod geometry right to left It may be necessary to rotate the arm on the servo one or two splines most of the time toward the rear and readjust the linkage length in order to prevent binding...

Page 35: ...transmitter with the antenna collapsed Turn on the receiver in your airplane With your airplane on the ground and the engine running you should be able to walk 30 paces approximately 100 feet away from your airplane and still have complete control of all functions If not don t attempt to fly Have your radio equipment checked out by the manufacturer R Step 2 Double check that all controls aileron e...

Page 36: ...full throttle dives Large models perform much more like full size aircraft than small models If the airframe goes too fast such as in a high throttle dive it may fail The Sukhoi should be flown like a full scale Sukhoi Throttle management is absolutely necessary If the nose is down the throttle comes back CHECK The Prototype Model Setup All of the recommended settings in this manual are a result o...

Page 37: ...flying except for 3 D aerobatics For precision flying or general sport hot dogging the low rate throws are perfect even for snap rolls The only exception is rudder rates I go to 3 D rate when doing stall turns and rolling circles since the more rudder the better for these When doing 3 D aerobatics I normally flip to 3 D rates just before the maneuver As soon as the maneuver is done I flip back dow...

Page 38: ...e sure to use Expo Setting the CG toward the aft location will help but I have had great results even at the forward CG location This is a wing tester and can be extremely violent but will always generate gasps of excitement Done correctly the Sukhoi can handle the challenge How to do it Start from about 400 500 feet straight and level chop throttle and push the nose straight down As soon as the m...

Page 39: ...nto a Torque Roll Elevator down from a hundred feet down to 20 feet or less and power up into a torque roll Ooh Worst way to mess up Let your direction control rudder get away from you after starting too low you could snap it right into the ground Ouch The Harrier What it is It is very slow forward flight in a very nose high about 45 attitude Setup Same as the Elevator and the raised ailerons help...

Page 40: ...que Roll What it is The Sukhoi hovers vertically in place rotating left around its roll axis Setup Full 3 D throws in elevator and rudder are a must An aft CG helps a little Also gyros provide the best aid to stabilize the aircraft They won t do the maneuver for you but they ll help I found them a fantastic tool in learning to torque roll kind of like training wheels A few years ago gyros made a b...

Page 41: ...e a Blender too much speed and it over stresses the wing Watch the speed The Wall What it is The Wall is a Parachute turned on end The model starts in normal level flight and suddenly corners nose up 90 as if it hit a wall Setup Same as the Elevator and the raised ailerons help in this maneuver too How to do it Start from about 100 feet straight and level chop throttle and as the model begins to s...

Page 42: ...or ground mounted devices launching a projectile The only exceptions permitted are rockets flown in accordance with the National Model Rocketry Safety Code or those permanently attached as per JATO use also those items authorized for Air Show Team use as defined by AST Advisory Committee document available from AMA HQ Models using rocket motors as a primary means of propulsion are limited to a max...

Page 43: ...43 Battery Tray Receiver Tray ...

Page 44: ... Copyright 2002 Horizon Hobby Inc 217 355 9511 ...

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