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QuiQue's Aircraft Yak-54S Assembly Manual

Semi scale arf 73”
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See also: Assembly Manual
Semi Scale Yak-54S, ARF 73"
Specifications
Wingspan:
Length Including Spinner:
Wing Area:
Weight (RTF):
Radio:
Recommended Engines:
2-Stroke
4-Stroke
Gas
ASSEMBLY MANUAL
73 in
69 in
1,060 sq in
11-12.5 lb
4-6 Channel W/6 Servos
1.4-1.6
1.4-1.80
26-30cc
1

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Summary of Contents for QuiQue's Aircraft Yak-54S

  • Page 1 Semi Scale Yak-54S, ARF 73” ASSEMBLY MANUAL Specifications Wingspan: 73 in Length Including Spinner: 69 in Wing Area: 1,060 sq in Weight (RTF): 11-12.5 lb Radio: 4-6 Channel W/6 Servos Recommended Engines: 2-Stroke 1.4-1.6 4-Stroke 1.4-1.80 26-30cc...

  • Page 2: Table Of Contents

    Table of Contents Quique’s Aircraft Company Covering Colors Going Over the Covering Hardware Supplied Additional Required Tools and Adhesives Servo Selection Using the Manual Warning Warranty Information Section 1-Preparing Fuselage Section 2-Horizontal Stab Installation Section 3-Vertical Fin Installation Section 4-Preparation and Installation of Hinges Section 5-Elevator, Rudder and Aileron Control Horn Installation Section 6-Rudder &...

  • Page 3: Quique's Aircraft Company

    Quique’s Aircraft Company 3410 Saint Paris Pike Springfield, OH 45504 Phone: (937) 629-0339 Fax: (937) 629-0335 Email: qqaircraft@gmail.com Website: www.Somenzini.com www.QQAircraft.com Online-Support:http://www.rcuniverse.com/forum/forumid_437/tt.htm Quique and I want to express our thanks to you for choosing our 73” Yak-54 S. We think that you will enjoy one of the best flying model aerobatic airplanes available.

  • Page 4: Covering Colors

    Covering Colors Ultra-cote covering used on this 73” Yak-54 S can be purchased from Horizon Hobbies Website. The codes are as follows: Sky Blue Hanu875 Smoke Purple Hanu868 White Hanu870 Bright Yellow Hanu872 Going Over the Covering Before beginning the assembly of your Yak-54 S, remove each part from its bag for inspection.

  • Page 5: Hardware Supplied

    Hardware Supplied Pull/Pull Rudder-4 hinges Aileron-12 hinges Elevator-6 hinges Engine Mount Wheels Wing Anti-rotation pins Engine Cowl & landing gear Tail Wheel Elevator & Wing connecting rods Fuel Tank Engine Box cowl mount blocks...

  • Page 6: Additional Required Tools And Adhesives

    Additional Required Tools and Adhesives • Covering/Trim iron • Xacto knife, #11 blade • Pacer hinge glue (PT-55) • 5, 15 and 30-minute epoxy • Petroleum jelly/Lithium grease • Acetone/Alcohol swabs • Felt-tip marker • Pencil and Marker • Ruler •...

  • Page 7: Servo Selection

    Servo Selection The servos used for the control surfaces of this Yak-54 S must have a minimum of 130 ounce-inch of servo torque. In the prototype Yak-54 S, we used JR8411SA on all control surfaces and on throttle we used one standard JR servo.

  • Page 8: Section 1-Preparing Fuselage

    Somenzini Yak-54S. balsa sheeting over the foam. Use the trim iron for this application. Do not touch the foam, bead board, with your trim iron.

  • Page 9: Section 2-Horizontal Stab Installation

    Section 2-Horizontal Stab Installation Required Tools and Adhesive • Ultra fine point Sharpie • Acetone • Xacto knife, #11 Blade • Felt tip marker • Thin and thick C/A Step 1 Center the H. Stab so that the left tip and right tip are equal distance from Figure 4 the fuselage sides.
  • Page 10 Step 5 To do this, you may sight down the fuselage from the rear. Use a new # 11 blade and gently cut See Figure 6. Make sure you are through the ultra cote. See Figure 5. looking straight down the middle of There are two layers, cut through the the fuse.

  • Page 11: Section 3-Vertical Fin Installation

    Section 3-Vertical Fin Installation Required Tools and Adhesive • Acetone • Xacto knife, #11 Blade • Felt tip marker • 30-minute epoxy • Alcohol Swab/Alcohol and paper towel • Round toothpick • White glue Figure 7 Step 1 Step 9 Insert the Vertical Fin in the fuse.
  • Page 12 Step 3 blade is helpful. Remove the black ink line with acetone. Remove the film covering as shown. As with the Horizontal Stab there is Step 5 more than one layer of film. By removing the film covering you will Glue in place with 15 to 30 minute have a stronger bond between the epoxy glue.

  • Page 13: Section 4-Preparation And Installation Of Hinges

    Section 4-Preparation and Installation of Hinges Required Tools and Adhesive • Xacto knife, #11 Blade • Lithium grease/Petroleum Jelly • Toothpicks • Pacer hinge glue (PT-55) or 30-minute epoxy The hinge slots are already installed in the balsa hinge locations on both Figure 10 the fixed surfaces and the moveable surfaces.
  • Page 14 Step 4 Check the gap on each control surface. The gap should be somewhere between 2 and 3 mm. This procedure will take some time to do all of the hinges but take your time and do a nice job. As you do each hinge and check out the proper depth and shape of the V-slot necessary for each hinge, the time...

  • Page 15: Section 5-Elevator, Rudder And Aileron Control Horn Installation

    Section 5-Elevator, Rudder and Aileron Control Horn Installation Required Tools and Adhesive Step 3 • Course sandpaper Then clean with alcohol or acetone • Xacto knife, #11 Blade and glue in place with epoxy. Be • 30-minute epoxy sure that the attachment point on the •...
  • Page 16 Find the location on the ailerons for Step 2 the P/C Board control horn and remove the film for both locations. Again rough up the surface on the See Figure 17. P/C board control horn that will be glued into the rudder. Clean with alcohol or acetone and epoxy.

  • Page 17: Section 6-Rudder & Tail Wheel Installation

    Section 6-Rudder & Tail Wheel Installation Required Tools and Adhesive Step 3 • Xacto knife, #11 Blade Cut the wire that will go into the • 30-minute epoxy rudder to about one inch in length. • Alcohol Swab/Alcohol and paper towel Step 4 •...
  • Page 18 Figure 21 shows the tail wheel Step 8 assembly ready for placement into the rudder. Check the hinges for the proper depth and allow the epoxy glue to harden. Step 9 Glue the rudder in place. Use 30- minute epoxy for the tail wheel wire attachment wire that is inserted into the rudder and also for the hinges that will be inserted into the...

  • Page 19: Section 7-Elevator Servo Installation

    Section 7-Elevator Servo Installation Required Tools and Adhesive • 24” servo extension • Sullivan inner nyrod • Pin vise • 2 full threaded servo mounting screws Step 1 Attach 24-inch servo extension wires Figure 23 to the elevator servos. You may want to wrap the servo plug connections Step 4 with a small piece of tape.
  • Page 20 Step 6 To attach the elevator servo control arms to the elevator control horns, use the titanium elevator connecting rods, provided. The longer titanium control rod is for the right side of the fuse. Note that the ball links provided should be mounted as shown in Figure 25.

  • Page 21: Section 8-Rudder Servo And Pull/Pull Installation

    Section 8-Rudder Servo and Pull/Pull Installation Required Tools and Adhesive avoid any metal-to-metal contact, which might cause R/F interference. • Pliers • Masking tape • 2 full threaded servo mounting screws Step 1 Install rudder servo as shown in Figure 26. Notice the servo wire is threaded through the oval holes in the bottom of the fuse formers and threaded forward to the radio...
  • Page 22 of the crimped brass tube pieces and neutral position also so you will be the cable. able to determine the final length of each pull/pull cable. Step 5 Step 9 Screw the threaded brass Slip the brass sleeve over the end of connectors half way into the plastic the cable and then through the hole ball link connection on the extended...
  • Page 23 Step 12 Bend the cable over and slip the loose end into the brass sleeve. Important: Do not use the spacer when assembling the ball link to the rudder control horn. See Figure 31. This spacer is not needed in this application and think of all of the weight you will save.

  • Page 24: Section 9-Engine Mounting And Throttle Control Installation

    Section 9-Engine Mounting and Throttle Control Installation Required Tools and Adhesive • Drill • #3 (0.213”) drill bit • #1 (0.228) drill bit Step 1 Mount your engine on the two engine mounts provided. Note that the prop hub of the engine must be exactly Figure 33 5.5 inches in front of the back of the two engine mounts.
  • Page 25 Step 4 mounting should look something like this. Figure 36 and 37. Determine the location of the holes on the firewall for installing the engine mount, mark them and drill the holes through the firewall using a #3 drill bit .213 of an inch in diameter to accept the blind nuts provided.

  • Page 26: Section 10-Landing Gear Installation

    Section 10-Landing Gear Installation Mounting Landing Gear to Required Tools and Adhesive Fuselage: • Drill and #3 (0.213”) drill bit Step 3 Step 1 Place the landing gear on the fuse in the correct position and mark the two Drill two holes in the landing gear to mounting hole locations with felt attach the gear to the fuselage.
  • Page 27 Step 6 Attach the wheel and wheel pant to the gear. Do not drill the hole in the wheel pant to accept the wheel pant screw just yet. Assemble as shown. Use 4mm x 50mm axle screw. Use 3 washers and two lock nuts that are provided as shown for each wheel.

  • Page 28: Section 11-Fuel Tank Installation And Engine Box Completion

    Section 11-Fuel Tank Installation and Engine Box Completion Required Tools and Adhesive • Medium C/A • 15-30 minute epoxy • Velcro • ¼”x3”x3-1/4” balsa wood • Masking tape • Sandpaper • Double sided tape Step 1 Assemble the fuel tank hardware as Figure 46 shown.
  • Page 29 mind of its own. Ten G’s would not be uncommon in some violent 3-D maneuvers, which this Yak-54 is capable of doing certainly with the control surface throws that you have available. Step 4 Install the fuel lines per the manufacturer’s instructions for the Figure 49 engine of your choice shown in...

  • Page 30: Section 12-Engine Cowling

    Figure 50 Figure 51 If you inadvertently get any epoxy in Figure 52 shows the location of the that slot area, make sure you clean it bottom blocks. out. If any excess epoxy gets in that slot and hardens it won’t be much fun to clean out and the canopy hatch will not slip into position.
  • Page 31 Step 3 the top of the cowling is parallel to the canopy hatch behind it. Draw a line that matches up with the middle of the hardwood blocks and Step 6 back onto the masking tape pieces you just placed on the fuse. Cut the holes needed in the engine cowling for the clearance of the Step 4...
  • Page 32 Step 8 muffler that will protrude outside of the engine cowling. Mark a vertical line one inch in front of the back of the engine cowling. Step 12 These are the locations for the four holes to fasten the cowling to the Cut a hole in the front of the engine fuselage.
  • Page 33 Notice the hole cut out in the front of the engine cowling in the area that is painted black. This of course is for the incoming air that will pass through and around the cylinder to cool the engine. When you are ready to attach the engine cowling, we have found that it is very helpful to use a small O-Ring, 3/32”...

  • Page 34: Section 13-Canopy Installation

    Section 13-Canopy Installation nuts that you will install in the inside Required Tools and Adhesive of the tabs. • Xacto knife, #11 blade Step 4 • Drill and drill bit #28 • Thin/Medium C/A Insert the blind nuts on the inside of •...
  • Page 35 Step 6 At this point you should drop a little thin C/A glue around this hole in the fuselage side to make the lite-ply fuse side harder. The C/A will soak in and make the light ply more like regular aircraft plywood. Step 7 Tighten the canopy screw down firmly it won’t crush the harden lite-...

  • Page 36: Section 14-Wing Preparation And Aileron Servo Installation

    Section 14-Wing Preparation and Aileron Servo Installation Required Tools and Adhesive Important: the measurement from the root chord rib to the center of the • Xacto knife, #11 blade locking pinhole is 9mm. See Figure • Fine sandpaper • Thin C/A •...
  • Page 37 Step 4 After you have checked all of these four holes for proper depth, use thin C/A glue and apply around the pins to affix them to the root rib of each wing. Step 5 Use some epoxy and make a fillet of Figure 64 epoxy inside the wing around the anti-rotation pin and the second wing...
  • Page 38 Step 11 Attach a nine-inch servo extension cable to the servo. You do this by using the same system you used to install the elevator servo extension cables. To insert the aileron servo extension wires, use a music wire with a loop end and pull the extension through the servo lead hole in the wing root rib.

  • Page 39: Section 15-Battery Tray Installation

    Section 15-Battery Tray Installation Required Tools and Adhesive • Pencil/Marker • Drill & drill bit #52 • 30-minute epoxy • Double-sided tape • Electrical tape • Velcro • Sandpaper (fine) Align the battery tray to the engine Figure 68 mount. Take a pencil and mark. Then sand the area where the tray will be glued and then clean with Note: This installation is required if...

  • Page 40: Section 16-Radio Equipment

    Section 16-Radio Equipment You are now in the final stages in Here are some better views (See completing the assembly of your Figure 70 & 71) of the switch mount Yak-54. Quique’s method of inside and the push/pull rod outside mounting the radio receivers in his the fuse.

  • Page 41: Custom Muffler

    Custom Muffler Central Hobbies has a custom muffler available for this Somenzini Yak-54 for the YS-140 Sport engine that Quique’s uses in this airplane. You may contact them at their website, www.centralhobbies.com. See Figure 72 & 73 for Quique’s custom muffler installation. Between the muffler can and the plywood piece on the bottom of the engine box, you can see that he uses a piece of silicone tubing to separate the two and then he uses electrical tie wraps for attachment.

  • Page 42: Balancing The Model

    Balancing the Model Perhaps one of the most important things that you need to check before you fly your plane is your model C.G. Correctly balancing an aerobatic model is critical to its performance and flight characteristics. An unbalanced model can be very hard to control.

  • Page 43: Control Throws

    Control Throws Aileron (As shown in Figure 76 & 77) Low Rate High Rate 39 mm Up 59 mm Up 39 mm Down 59 mm Down Figure 76 Figure 77 Elevator (As shown in Figure 78 & 79) Low Rate High Rate 8 mm Up 61 mm Up...
  • Page 44 Rudder (As shown in Figure 80 & 81) Low Rate High Rate 34 mm Right 70 mm Right 34 mm Left 70 mm Left Figure 80 Figure 81...

  • Page 45: Preflight At The Field

    Preflight at the Field Range Test Your Radio Make sure you range check your radio before you attempt to fly your plane. Turn on your transmitter with antenna fully collapsed and walk away 100 ft. Move all your control surfaces and make sure everything is fine. If you are running a gas engine not only you need to range test your plane when it’s not running but also when the engine is running.

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