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- Yak-54S
- Assembly Manual
QuiQue's Aircraft Yak-54S Assembly Manual
Summary of 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: gas 50-75cc.
Page 2: Table of Contents
Table of contents quique’s aircraft company 3 covering colors 4 going over the covering 4 hardware supplied 5 additional required tools and adhesives 6 servo selection 7 using the manual 7 warning 7 warranty information 7 section 1-preparing fuselage 8 section 2-horizontal stab installation 9 sectio...
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 ...
Page 4
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...
Page 5
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 5.
Page 6
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 • drill • drill bit 1/16”,1/8”, ¼”, 3/16”, #33, #25, #54...
Page 7
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. Plea...
Page 8
Section 1-preparing fuselage required tools and adhesive • xacto knife, #11 blade • trim iron step 1 use a xacto knife with a # 11 blade and cut away the film covering on both sides of the fuselage for the wing openings, figure 1. Some modelers may want to overlap the film covering down inside the f...
Page 9
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 the fuselage sides. See figure 3. Figure 3 * ab...
Page 10
Step 5 use a new # 11 blade and gently cut through the ultra cote. See figure 5. There are two layers, cut through the top layer first and remove it. You have probably cut through the second layer. If not you may cut through the second layer. Be very careful not to cut into the balsa sheeting as thi...
Page 11
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 that is covered by ultracote. Remove the covering by x...
Page 12
Rudder control horn installation step 1 locate the pre-drilled rudder control horn hole that is covered by ultracote. There are two holes, the more forward one is the one you need to remove the covering by xacto knife. Step 2 use the dubro heavy duty dual pull- pull system cat. No. 883. Insert the 8...
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Figure 10 13.
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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 move...
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. Step 2...
Page 16
Sure that there is not much space between the elevator tips and tips of the horizontal stab. See figure 14. Figure 14 take some lithium grease or petroleum jelly and apply a very small amount on both sides of the hinge point on the flat hinges. Quique used a round toothpick. See figure 15. This will...
Page 17
Figure 16 figure 17 figure 18 17.
Page 18
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 • (2) 1.25” airwild/similar aluminum servo arms step 1 prepa...
Page 19
Several times which will help to seal the pin to the hole in the root rib. Step 5 after the c/a has hardened, make a fillet of 10 or 12 minute epoxy and micro balloons and apply on the inside of the root rib. I used a small length of 3/16” wooden dowel to apply the epoxy-micro balloon mix. Figure 21...
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. Step10 tie the string to the servo extension an...
Page 21
Section 6-tail wheel installation required tools and adhesive • 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. The pivot point of the tail wheel should line up over t...
Page 22
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 attach 24-inch servo extension wires to the elevator servos. You may want to wrap the servo plug connections with a...
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. The ball links are mounted on the outside of the servo a...
Page 24
Section 8-rudder servo and pull/pull installation 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 the fuselage. Step 2 check provided pu...
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. Also note that the pull / pu...
Page 26
Section 9-engine mounting and throttle control installation required tools and adhesive • drill • 1/8”, ¼” drill bits • sullivan locking sleeve ball joints s560 • 2-56 rod two engine mounting templates are provided for both the 3w 50 and the da-50r to ease the task of engine mounting. Also make sure...
Page 27
Figure 33 3w-50 throttle control hook-up step 4 you will have to make your own servo plate and position it for the best hook-up to your engine. See figure 34. Figure 34 step 5 the 3w-50 comes with a spring loaded throttle. Do not remove the spring. Hook up the throttle servo with the spring in place...
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 mov...
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 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 ...
Page 30
Section 10-landing gear installation required tools and adhesive • drill and 3/16”/4.5mm drill bit • axles dubro cat no.248 • 3 ¼” threaded light wheel cat no. 325tl • dremel • dremel grinder and cutting wheel • felt tip pen • # 33 and #25 drill bits • (2) 4-40 socket cap screw step 1 drill six hole...
Page 31
Figure 44 step 7 now hold the wheel pant in place with the correct angle and drill through the hole you just drilled in the landing gear and on through the wheel pant. Step 8 now drill a larger hole in the wheel pant attachment hole with a number 25 drill bit to accept the blind nut which you will i...
Page 32
Section 11-fuel tank installation and engine box completion required tools and adhesive • medium c/a • 15-30 minute epoxy • velcro • 2”x2”x6” balsa block • masking tape • sandpaper • double-sided tape step 1 assemble the fuel tank hardware as shown. See figure 46. Be sure the vent tube with the shor...
Page 33
Figure 49 figure 50 use double-sided high strength tape in between the plate and bottom of the tank to prevent the tank from forward motion. Strap the tank using zip ties or velcro. Figure 51 2. Another way is how quique has done his. Use two blocks of balsa and sitting them on the floor of the fuse...
Page 34
Figure 52 then using velcro, strap the tank to the plate that tank is located on. Figure 53 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. Important: make sure the tank is firmly secured. Keep in mind that with a full fuel tank, say 2...
Page 35
Figure 55 figure 56 section 12-engine cowling required tools and adhesive • course sandpaper • 15-30 minute epoxy • pencil/marker • drill & 1/16” drill bit • masking tape step 1 four screws are used to attach the cowl on the four wooden blocks attached to the fuselage. The cowling should be flush wi...
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. Figure 58 figure 59 36.
Page 37
Section 13-canopy installation required tools and adhesive • xacto knife, #11 blade • drill • thin/medium c/a • 5-minute epoxy step 1 first glue the two small carbon fiber tubes in the front of the canopy. Figure 60 step 2 now install the two blind nuts on the inside of the tabs that are on the bott...
Page 38
The fuse and use the 3/16 inch dowel to insert the o-ring completely and to full depth to the edge of the plywood piece that rests just next to the two canopy attachment tabs. The reason for the o-rings is two fold. First the screws are less likely to vibrate loose. Secondly and the most important r...
Page 39
Section 14-radio equipment you are now in the final stages in completing the assembly of your yak-54. Quique’s method of mounting the radio receivers in his proto-type airplanes: starting with the plywood mounting plate for the receiver, motor control servo and the radio switch: 1. Apply some beads ...
Page 40
Tray with some sticks like figure 67 and mount the regulator on the same tray also. Figure 64 figure 65 figure 66 figure 67 planes equipped with 3w-50 ignition and ignition battery are mounted upfront but receiver battery location will be inside the fuselage. Please make sure you move the battery ar...
Page 41
Figure 69 figure 70 figure 71 figure 72 41.
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. Figure 73 figure 74 figure 75 42.
Page 43
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. Please make sure that yo...
Page 44
Control throws aileron (as shown in figure 78) low rate high rate 2 ½”up 3” up 2 ½” down 3” down figure 76 44.
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 45.
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 46.
Page 47
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 onl...