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QuiQue's Aircraft Yak-54S Assembly Manual

Semi scale yak-54s, arf 85”
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Semi Scale Yak-54S, ARF 85"
Specifications
Wingspan:
Length Including Spinner:
Wing Area:
Weight (RTF):
Radio:
Recommended Engines:
Gas
ASSEMBLY MANUAL
85 in
78.5 in
1,320 sq in
15.5-17 lb
4-6 Channel W/6 Servos
50-75cc

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

  • Page 1 Semi Scale Yak-54S, ARF 85” ASSEMBLY MANUAL Specifications Wingspan: 85 in Length Including Spinner: 78.5 in Wing Area: 1,320 sq in Weight (RTF): 15.5-17 lb Radio: 4-6 Channel W/6 Servos Recommended Engines: 50-75cc...

  • 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-Elevator, Rudder and Aileron Control Horn Installation Section 4-Preparation and Installation of Hinges Section 5-Wing Anti-Rotation Pins and Servo Installation Section 6-Tail Wheel Installation...

  • 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 85” 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 85” Yak-54 S can be purchased from Horizon Hobbies Website. The codes are as follows: Deep Blue Hanu873 True Red Hanu866 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 26 Hinges and Wing pins/clips Tail Wheel Aileron/Elevator Titanium rods & ball links Fuel Tank DA50/3W50 Engine Template & stand offs for 3W engine Cowl and Canopy hardware Optional Dubro Hardware to complete your Assembly: Wheels and Axles Control Horn System...

  • 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 180 ounce-inch of servo torque. In the prototype Yak-54 S, we used JR8611 on all control surfaces and on throttle we used one standard JR servo. Best results can be obtained by using digital servos.

  • Page 8: Section 1-Preparing Fuselage

    Section 1-Preparing Fuselage Required Tools and Adhesive Step 2 • Xacto knife, #11 Blade Cut the film on the horizontal stab • Trim Iron openings, both elevator servo openings and the slots for the rudder cables. There is a hole on the right side of the fuse just opposite of Step 1 opening on the left side however it is...

  • 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 couple of times. Then after glue dried flip the plane to the other side Use a new # 11 blade and gently cut and do the same thing. through the ultra cote. See Figure 5. There are two layers, cut through the top layer first and remove it.

  • Page 11: Section 3-Elevator, Rudder And Aileron Control Horn Installation

    Section 3-Elevator, Rudder and Aileron Control Horn Installation Required Tools and Adhesive • Xacto knife, #11 Blade • 5-minute epoxy • Alcohol Swab/Alcohol and paper towel Elevator Horn Installation Step 1 Locate the elevator control horn hole Figure 7 that is covered by ultracote. Remove the covering by xacto knife.
  • Page 12 Rudder Control Horn Installation Aileron Horn Installation Step 1 Step 1 Locate the pre-drilled rudder control Locate the aileron control horn hole horn hole that is covered by and servo location that is covered by ultracote. There are two holes, the ultracote.
  • Page 13 Figure 10...

  • Page 14: 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 the fixed surfaces and the moveable surfaces.
  • Page 15 Step 1 Use a # 11 blade to open the flat hinge slot. The hinge slots will have to have a larger opening cut out just on either side, top and bottom, of the pivot point on both surfaces. So you will need to open the area in the fixed and moveable surfaces of the ailerons, elevators and rudder.
  • Page 16 sure that there is not much space between the elevator tips and tips of the horizontal stab. See Figure 14. Figure 15 Step 5 Sealing the Control Surfaces Figure 14 Take some lithium grease or After you are done hinging the Petroleum jelly and apply a very ailerons and elevators, make sure small amount on both sides of the...
  • Page 17 Figure 16 Figure 17 Figure 18...

  • Page 18: Section 5-Wing Anti-Rotation Pins And Servo Installation

    Section 5-Wing Anti-Rotation Pins and Servo Installation Required Tools and Adhesive • 5-15 minute epoxy • Ruler • Coarse sandpaper • Acetone/Alcohol swab • Thin C/A • Micro balloons • (2) 18” servo extensions • Wheel color/Weight • String Figure 19 •...
  • Page 19 several times which will help to seal installed the wings to the fuse you the pin to the hole in the root rib. will use this O-ring and fiber washer to slide over the anti-rotation pin Step 5 before you put the keeper clip in the hole in the anti-rotation pin.
  • Page 20 Step 9 Tie a weight to a piece of string. A wheel collar works great in this application. Lower the string into the wing from the aileron servo opening. Hold the wing with the tip upwards and let the weight drop out through the wing root for the servo.

  • Page 21: Section 6-Tail Wheel Installation

    Section 6-Tail Wheel Installation joint that is to be inserted into the bottom of the rudder with course Required Tools and Adhesive sandpaper. • Drill • Drill bit #54 • Thread lock • Course sandpaper • 5-minute epoxy Step 1 Drill pilot holes with a number 54 drill bit for the three screws that attach the tail wheel bracket.

  • Page 22: Section 7-Elevator Servo Installation

    Section 7-Elevator Servo Installation Required Tools and Adhesive • (2) 24” servo extension • Sullivan inner nyrod • Pin vise • 1/16”drill bit • 1 ½” Airwild aluminum servo arms Step 1 Figure 27 Attach 24-inch servo extension wires *Above picture doesn’t show your fuselage. to the elevator servos.
  • Page 23 Step 6 Install the heavy duty Dubro control horn. Measuring from the hinge line to the ball link’s bolt should be 1 ¼” inches. Adjust the provided titanium rod (the longest) to the right length in order to set the elevator at neutral position.

  • Page 24: Section 8-Rudder Servo And Pull/Pull Installation

    Section 8-Rudder Servo and Pull/Pull Installation of that adjustment should be for the final cable tightening process. Required Tools and Adhesive • Z-42 thread locker (Pacer) • Thin C/A • 0.05 Allen wrench • (4) full-threaded servo screws • Wire Cutter Step 1 Install rudder servo the way that output shaft is towards the rear of...
  • Page 25 Step 8 Attach the ball links from the bottom of the CF arm to avoid any contact with the former as shown in the previous picture. Note that the taper of the black rudder extended servo arm is mounted so that the tapered part of the arm is facing to the front of the fuse.

  • Page 26: Section 9-Engine Mounting

    Section 9-Engine Mounting and Throttle Control Installation Required Tools and Adhesive nuts on the inside of the firewall and of course use the four wood stand- • Drill off blocks provided when mounting • 1/8”, ¼” drill bits the engine. Your engine should like •...
  • Page 27 any problem occurs with the linkage etc. Note that you will need to use an analog servo if you connect the linkage with the spring loaded on the carburetor. It works great! Saves changing the spring-loaded throttle. Figure 33 3W-50 Throttle Control Hook-up Step 4 You will have to make your own Figure 35...
  • Page 28 Note: If your plane doesn’t have the triangle stocks on top and bottom of the engine box then after inserting the template, bring it all the way down or up the firewall. Measure the distance from the top/bottom of the template to the top/bottom of the firewall that should be close to 11 mm, then move the template half...
  • Page 29 You will have to make your own servo plate and position it for the best hook-up to your engine. See Figure 40. Figure 42 Figure 40 Step 4 Desert Aircraft recommends using throttle rod instead of cable for best results. Make Z-bend the side of the rod that connects to the servo and use Sullivan locking sleeve ball joints on the throttle arm.

  • Page 30: Section 10-Landing Gear Installation

    Section 10-Landing Gear Installation holes as a template to mark the location on the fuse landing gear Required Tools and Adhesive mounting plate. Be sure that the • Drill and 3/16”/4.5mm drill bit landing gear is swept forward and not to the rear before you drill the six •...
  • Page 31 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. Figure 44 Step 7 Now hold the wheel pant in place Figure 45 with the correct angle and drill through the hole you just drilled in Step 11...

  • Page 32: Section 11-Fuel Tank Installation And Engine Box Completion

    Section 11-Fuel Tank Installation and Engine Box Completion you can also use your expertise to Required Tools and Adhesive do this but here are two ways that we suggest: • Medium C/A 1. Making a tray like below pictures. • 15-30 minute epoxy It’s made of 1/8”...
  • Page 33 Figure 49 Figure 51 2. Another way is how Quique has done his. Use two blocks of balsa and sitting them on the floor of the fuselage. One in front of the wing socket and the other behind the wing socket like below drawings.
  • Page 34 Figure 54 Step 3 In both cases you need to trim the top former so you can fit the tank, like shown in Figure 49. Figure 52 Important: Make sure the tank is Then using Velcro, strap the tank to firmly secured.

  • Page 35: Section 12-Engine Cowling

    blocks should measure 15mm forward from the back of the cowling. Step 2 Drill a pilot hole, maybe with a 1/16” dia. drill bit through the cowl into the four mounting blocks. Step 3 Figure 55 Remove the cowl and with 4mm (#20) drill bit, drill holes in the wooden blocks to accept the blind nut.
  • Page 36 calculation to make sure you have enough opening for the air to exit. It will be necessary for you to cut an additional hole in the front and bottom of the cowling to allow incoming air to pass directly to the engine head.

  • Page 37: Section 13-Canopy Installation

    Section 13-Canopy Installation Required Tools and Adhesive Step 3 • Xacto knife, #11 blade Now open up the two canopy access • Drill holes on the side of the fuse with a • Thin/Medium C/A no. 11 Xacto blade. • 5-minute epoxy Step 4 There is a brass metal tube installed Step 1...
  • Page 38 the fuse and use the 3/16 inch dowel apply a think layer of epoxy and to insert the O-ring completely and to insert it back in the fuselage hole. full depth to the edge of the plywood piece that rests just next to the two canopy attachment tabs.

  • Page 39: Section 14-Radio Equipment

    Section 14-Radio Equipment You are now in the final stages in and the push/pull rod outside the completing the assembly of your fuse. You may need to make your Yak-54. Quique’s method of own music wire rod to connect the mounting the radio receivers in his receiver switch to the outside of the proto-type airplanes: Starting with...
  • Page 40 tray with some sticks like Figure 67 and mount the regulator on the same tray also. Figure 67 Planes Equipped with 3W-50 Ignition and ignition battery are Figure 64 mounted upfront but receiver battery location will be inside the fuselage. Please make sure you move the battery around for the correct C.G before final installation of the...
  • Page 41 Figure 69 Figure 72 Figure 70 Figure 71...
  • Page 42 Receiver Antenna Guide the antenna through a nyrod and guide the nyrod towards the tail in between of formers. A drop of CA would hold the nyrod to the formers. You can exit the antenna from the fuselage or leave it inside. See below Figures.

  • Page 43: 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 44: Control Throws

    Control Throws Aileron (As shown in Figure 78) Low Rate High Rate 2 ½”Up 3” Up 2 ½” Down 3” Down Figure 76...
  • Page 45 Elevator (As shown in Figure 79) Low Rate High Rate 1/2”-5/8” Up 3”-3 1/2” Up 1/2”-5/8” Down 3”-3 1/2” Down Figure 77...
  • Page 46 Rudder (As shown in Figure 80) Low Rate High Rate 1 5/8” Right 3 ½”-3 3/4” Right 1 5/8” Left 3 ½”-3 3/4” Left Figure 78...

  • Page 47: 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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