Pilot RC Yak 54 User manual

1. Inventory the parts in your kit and familiarize
yourself with the assembly manual before start-
ing on this project. If this is your first aerobatic
model, get an experienced modeler from your
club to help you or call your local retailer.
2. Start working on the fuselage before the en-
gine is mounted. It is lighter and much easier to
handle on the workbench.
Rudder and tail wheel installation
1. Start with the Rudder before going to the
elevator since it will be easier to get to and
mount all the hardware.
2. Cut out the slots in the rudder to accept the G-
10 fiberglass dual rudder horns making sure they
are equal distance on both sides of the rudder to
prevent an off center throw. Apply 15 minute
epoxy to the horns making sure the holes are
filled and then slide the two keeper lock plates
in place at the same time. Wipe off any excess
epoxy with rubbing alcohol. Install the 4/40 ball
and swivel rod ends to keep the horns aligned
while the epoxy cures. Only snug up the bolts
and nylon insert nut so as not to crush the fiber-
glass horns. Make sure the push rod swivels are
mounted in the same width holes as the rudder
arm.
3. Trial fit the rudder hinges in place to make
sure it is free. You will glue this in later after
you get the tail wheel bracket mounted.
4. Draw a center line on the tail wheel mounting
block.
5. Tape the tail wheel bracket into place and
drill 3 holes the same size as the bracket holes.
6. Remove the access hatch in the rear.
Assembly Manual for Yak 54 -by Pilot RC
G-10 dual rudder Horns
Aluminum Steering peg
Elev Mtg tabs w/bolts
Access hatch
Slot for Rud cable
Mounting Screws CL
G-10 Elevator
G-10 Servo Arm
Use blue thread lock on all
bolts and blind nuts!

7. Now drill out the holes with the same size bit as the
blind nuts.
8. Install the blind nuts by using a large washer and the
bolt to draw the blind nut into place.
9. Now bolt the tail wheel bracket in place using blue
lock tite on the threads. Use 4 screws to mount access
hatch into place.
10. Drill a hole slightly smaller than the aluminum
steering/swivel peg in the center of the rudder about 2”
from the hinge line, force into place with lots of 5 min-
ute epoxy.
11. Now glue the rudder in place but first use a tooth
pick and put some Vaseline on the hinges to keep the
epoxy from gluing the hinges shut.
12. Use a thin metal artist paint spatula to make sure all
the 15 minute epoxy gets into the hinge slots and coat
the hinges on the lower one half so they will be coated
evenly when pushing the rudder into place.
13. Wipe off any excess epoxy that may have ozzed out
during the rudder mounting process and stand the air-
plane on its nose while the epoxy cures.
14. Remove the steering arm from the tail wheel and
install it into the swivel peg. Use blue lock tite when
reinstalling the tail wheel bracket making sure it is
aligned straight with the rudder and fin.
15. Mount the rudder steering arm on your favorite
servo after mounting the 4/40 push rod ends with cable
attachments.
16. Mount the 160 oz/in or large torque rudder servo in
place using servo screws.
17. Cut two equal lengths of rudder steering cable pro-
vided.
18. Attach the cable to the servo using the brass tubing
and crimp them in place with crimping pliers.
19. Cut away the UltraCoat from the servo mounts and
the slot for the rudder control cables.
20. Run the 36 “yellow nyrod inter tubing from Dubro's
nyrod set in from the back of the fuselage through the
slots provided for the steering cable. Push forward to
the servo. While keep the tube in place, slide the steer-
ing cable inside the tube all the way. Pull out the yellow
tube and there is your cable. Repeat for the other cable.
21. Finger tighten both cable as tight as you can and
then finish tightening using the turnbuckles. Check the
throw to make sure nothing is rubbing and that a cable
does not go slack at maximum throw.
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Servo w/push rod
Rec w/servos plugged in.
Rudder Servo with 3” Metal arm.
Zip ties Foam wire
Holder.
Bolt on tabs for Stab

Stab and Elevator Installation
1. Install the dual G-10 horns in place for the
elevator horn before sliding the stab in place.
2. Remove the UltraCoat from the mounting
hole tabs and blind nuts in the fuselage.
3. Screw the threaded push rod and swivel in
place onto the elevator horn.
4. Plug in a 24” servo wire extension and use a
securing clip provided to make sure they don’t
come unplugged in flight.
5. Mount the elevator servo in place and pull
the servo wire extension up toward the front.
6. Attach the servo extension wire using foam
wire holding brackets or zip ties to the formers
along the sides of the fuse so they can’t inter-
fere with the rudder control cables.
7. Now mount the servo arm on to the elevator
push rod before installing it on the servo so
you can tighten the 4-40 nylon insert locking
nut to the 4-40 mounting screw.
8. Slide the stab on to the carbon fiber tube
and attach to fuse using the bolts provided by
adding lock washers and washer to the bolts.
Use blue lock tite on the threads.
9. Now install the servo arm to the servo after
making sure the elevator is level with the stab
with the servo is in dead center. Tape the ele-
vator in place using blue painter’s masking
tape. (Use your receiver & transmitter or
servo driver to center the servo.)
Gear & Wheel Pants installation
1. Install the axles in place with a wrench and
socket on the nylon insert lock nuts. Do not
over tighten and crack the carbon fiber.
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G-10 Horns. Epoxy in place.
Servo swivel clevis

2. Remove the wheel collars from the axles.
3. Trial fit the wheel pants and make sure there is room
for the outside shoulder nut to fit. Use you dremel tool
to remove any extra fiberglass. The Shoulder nut has to
have one of the points up so as to match the triangle cut
in the pants.
4. Now make sure the wheel pants are mounted 90 de-
grees to the bottom of the gear and trail fit a wheel on
the axle.
5. Clamp pant into place and drill one hole first the
same size and the holes in the gear and insert one bolt.
Now drill the second hold in the wheel pant.
6. Remove the wheel pant and drill the hole out bigger
to accommodate the blind nuts.
8. Draw the blind nuts into place using a large flat
washer and Allen wrench on the bolt.
8. Use thin Zap CA flowed around the blind nuts to se-
cure them in place.
9. Mark to inside and outside location of the wheel col-
lars and make sure the wheel is in the center of the pant
using a Sharpie felt tip. File a flat spot on the axles for
the allan screws and mount the wheel on the axle using
blue lock tite on the allan screws. Spin wheel to make
use it is free but not to much play from side to side.
10. Install the wheel pants with tipping them slightly to
miss the end of the axle.
11. Finally install the wheel pant using blue lock tite on
the threads of the blots, but do not over tighten.
12. Repeat the above process for the other wheel pant.
13. Now install the blind nuts into the landing gear
mount using the same washer drawing into place tech-
nique use earlier. Run some thin Zap CA around the
blind nuts to secure in place.
14. Bolt the landing gear in place and this will help you
while working on the engine installation. (locktite blue)
Wing and servo Installation
1. This is the fastest of all the installations.
2. Cut out the slots for the G-10 aileron horns on the
bottom only. The top ultra Coat will hold in the 15
minute epoxy.
3. Install the horns by coating them with epoxy and slid-
ing them into place. Put the locking tab into place and
wipe off an excess glue with rubbing alcohol.
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Axle on Carbon LG
Wheel collar
Mounting bolts into blind
Nuts inside pant.
G-10 Dual control Horn
G-10 Servo arm
Center wheel in pants

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4. Install the 4-40 push rod swivel to the horn to make
sure the holes are aligned.
5. Cut out the ultra Coat from the servo mounting
holes. Note the servo position.
6. Mount the 1” servo arm to the servo push rod end
using a 4-40 bolt, lock nut and blue lock tite.
7. Attach a 12” servo lead extension and secure in
place using the servo plug clips provided.
8. Use the string provided to pull the extension through
the wing.
9. Now you can screw the servo into place and mount
the servo arm making sure it is 90 degrees to the ai-
leron. Check the position of the aileron with the servo
in dead center.
10. Now mount the servo arm onto the servo making
sure to tighten all bolts and using lock tite.
11. Trial fit the wing tube and mount the wings making
sure the wing mounting bolts align and will tighten.
Now remove the wings.
Engine installation
( You need to decide now if you are going to
use a canister muffler or standard pitts style
that will go straight out the cowl! )
1. Measure the length of the engine from the
firewall mounts to the prop thrust washer for
the proper distance allowing 1/4” to 1/2”
from the edge of the cowl. Move if needed.
2. Draw the engine center line and thrust line
darker with a ball point. Note the 2 degree
right thrust built into the firewall. The cowl
is already built with this offset as well.
3. Use the drill template if you are going to
use a DA .50 or measure your engines mount-
ing location. Remember the engine is
mounted inverted.
4. Determine where the throttle arm push rod
is going to the firewall and drill a hole. If
you are going to use a Nyrod, then make the
hole the same size as the outsider red tube.
Flex header pipe going back to
canister muffler.
Halls sensor to electronic
ignition system.
Canister muffler held in place
with tie wrap.
Tank over flow-
tygon tubing.
Carve out cowl to fit your engine, spark plug cable and
exhaust pipe
Tank overflow
Use silicone on exhaust joint.

5. Now you need to decide if you are going
to use a manual or servo to operate the
choke. Drill holes in firewall for chock op-
erating wire.
6. Remove the fuel tank and but leave
Velcro tape in place.
7. Install the engine and drill holes for the
pushrods for the throttle and/or choke ser-
vos as shown in the pictures. You can use a
commercial mounting bracket or servo tape
only but seal the plywood with 5 minute ep-
oxy or thin CA glue so servo tape will stick.
8. Install the Nyrod and check for interfer-
ence when both are operated.
9. Reinstall fuel tank and make a hole in the
firewall for the Engine fuel line. Reattach
line to fuel Dot. Wait till later to determine
where the outlet for the overflow line will
go depending on your engine installation.
Use 3/8” urethane foam under tank to pre-
vent the gas from foaming due to vibration.
Make sure there is clearance between the
firewall and wing tube so the tank does not
rub up against any structure. Mount as
close to the CG as possible.
10. You can now mount the kill switch for
the ignition in the location hole provided on
the right side of the firewall near the cowl.
(The kill switch show is from MPI)
11. Install the ignition module on the floor
using 4-40 screws with blind nuts or wash-
ers and nylon lock nuts.
12. Route the battery power cable and
switch away from the 2.4 or standard 72
Mhz receiver to avoid RF interference.
13. Run the spark plug wire out the bottom
of the tank tray mount and down to the en-
gine. Align the shielded cable in the center
of the engine and use a zip tie to hold in po-
sition so it will not rub against the cowl.
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MPI Kill Switch moduleElectronic ignitions system.
Clip lock & zip tie
Velcro Straps hold tank.
Nyrods for choke and throttle
Foam behind tank
Fuel over flow line
Batteries can also be mount on the firewall or
firewall engine mount if needed for proper CG!

14. Route the Halls Sensor cable and hold in place with a
zip tie to the engine mount and lock the plugs together.
15. Route the rest of the servo cables and extensions de-
pending on the radio you have. You can mount the new
small 2.4 receivers with servo tape or hot glue.
16. You should be able to mount the batteries on the floor
just to the rear off the wing tube as shown. Your balance
at the CG will determine their final mounting location.
17. Install the canister muffler in the cooling tunnel with a
commercial muffler mount and a support in the front of
the muffler made of 1/4” plywood using some silicon tub-
ing for insulation form the heat using E-6000 glue.
18. Install the flex tube header pipe by attaching it to the
engine first and then bending it around the back of the en-
gine and then man handling it back into the center with a
reverse curve.
19. Trial fit the pipe to the muffler and cut of the pipe
once you have determined that it fits and will not fall out
due to vibration.
20. Push the muffler tightly into the header and then glue
the muffler supports in place using a 3/8” square hard
wood piece with 15 minute epoxy. Set aside to cure.
21. Measure the center of the spark plug and make a pat-
tern of the engine head shape with a card stock or file
folder stiff cardboard to hold its shape. Trial fit to make
sure there is a minimum of 3/8” around the engine cooling
fins. Also cut out for clearance for the exhaust pipes for
the muffler you have. Measure twice and cut once.
22. Use a fiber cutting tool to rough cut the cowl and fin-
ish with a round sander making use all the corner are
rounded and not sharp 90 degree angle that can split under
vibration.
23. Trial fit till the cowl is right and then install into posi-
tion using the bolts. There are two that mount from the
rear of the firewall on the top of the cowl and two that
mount from the front of the cowl opening.
24. Make an extension tool with brass tubing and the
proper size ball driver on one end and the handle on the
other end by cutting a standard ball driver in half.
25. Use some small heat shrink tubing over the bolt as it is
attached to the ball drive to held in place to install the
bolts. Carry some extra heat shrink tubing to the field
along with a small cricket lighter in case you have to reat-
tach the cowl in the future by this same method.
26. Install the Prop and spinner to the engine, attach the
wings and check the CG, located at the wing tube, with
the canopy in place. Move batteries around till level.
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Canister Muffler in cooling tunnel
Muffler Mounting bracket with silicon insulators.
Two batteries installed under the Velcro tank
straps over 3/8” foam.
Throttle Servo with Nyrod.
Brass tubing
Cowl Bolt
Handle
Heat Shrink over the
bolt & ball tool
Special Cowl Bolt Install-
ing Tool

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Control Throws
1. After you set the control throws up and have a few flights under you belt, you can change the
rates and amounts as well as moving the CG back at 1/4” intervals.
Ailerons 30 Degrees on High rate / 12 Degrees low rate.
Elevators 40 Degrees on High rate / 12 Deg. Low rate
Rudder 45 degree High rate / 40 Degree low rate.
2. Learn to use exponential of about 40 percent on your elevator to make great landings and not
over control a highly aerobatic airplane. Use 70 percent exponential on High Rate!
Final Flight Check
1. Make sure you have the right model programmed into your transmitter.
2. Check the direction of each surface not and also right before you take off.
3. Recheck all screws, horns and linkages for slop.
4. Remember nothing wrong on the ground ever improves in the air!
5. Check the airplane with the engine running and do a range check with your body between you
and the plane at 150 feet. Check your battery voltage after each flight in case one servo is
draining your battery pack.
6. Recheck all screws, horns and linkages for slop after your maiden flight and check for damage
if you made a bad landing you first time.
7. Have an experienced pilot fly it for you the first time if you have any doubts in your mind
about the maiden flight.
8. Take a break after you first flight and let the adrenaline burned off by bragging to your fellow
members how good it flies.
9. Fly low and at a medium speed on your first few flight.
10. Be sure the engine is right all the way through the run up to idle with no cough of hesitation in
between.
11. Listen to your engine run and have an observer with you to remember what you talked about
during the flight or if you get into trouble. Always balance your props, vibration is a killer.
12. Remember nose heavy airplanes fly all the time, tail heavy airplanes fly only once. Be on the
CG!
13. Fly 3D two mistakes high in the beginning and not close to people, planes or runways. Being
a center of the runway hog does not endear you to many modelers.
Conclusion:
We at Pilot RC stand ready to answer any and all question about your Yak 54. Let
us know how we can help you enjoy flying your Yak by emailing us or calling us
with your questions.

Safety Precautions
This is not a Toy! This R/C ARF kit and the model you build from this kit is not
a Toy!
It is capable of serious bodily harm and property damage. It is YOUR responsibility as
your alone to assemble correctly, properly installing all R/C components and fling gear
(engine, tank, radio, pushrods, etc. and to test the model and fly it only with experi-
enced, competent help from an experienced pilot using commonsense and in accor-
dance with national and international safety standards as set forth by many Model Air-
plane Associations. It is suggested that you join such an organization and adhere to
there rule for safety of fellow pilots. If you are just starting in R/C this in not the plane
for you to learn how to fly. This is not a beginners airplane but designed for advance
pilots who know aerobatics. If you need help contact a local hobby shop and purchase
a trainer. Join a model airplane club in your area and take lessons from a veteran R/C
flight instructor.
Limits Of Responsibility: We accept no responsibility for crash damage. It is impossible to
determine for certain whether crash damage was the result of a radio system failure or pilot er-
ror. We accept no responsibility for crash damage occurring during the use of a radio controlled
model. We accept no responsibility for improper installation of our products.
Disclaimer and Limitation of Liability as to Products Sold
All Pilot RC products are guaranteed against defects for the period of 30 days. EXCEPT AS
EXPRESSLY STATED HEREIN, Pilot RC makes no representations or warranties, either ex-
press or implied, of any kind with respect to products sold on the Pilot RC site. EXCEPT AS
EXPRESSLY STATED HEREIN, Pilot RC expressly disclaims all warranties, express or im-
plied, of any kind with respect to products sold on this site, including but not limited to, mer-
chantability and fitness for a particular purpose. By placing an order, you agree that the sole
and exclusive maximum liability to Pilot RC arising from any product sold on the Pilot RC
sites shall be the price of the product ordered. In no event shall Pilot RC, its directors, officers,
employees and representatives be liable for special, indirect, consequential, or punitive dam-
ages related to product sold.
Except in respect of death or personal injury caused by Pilot RC\'s negligence, under no cir-
cumstances whatsoever shall Pilot RC. be liable to the buyer for any loss or damage whatso-
ever (including but not limited to loss of profit or the loss of any other form of financial or non-
financial benefit; loss of use of or damage to any property; work stoppage; any special, indirect,
incidental or consequential loss or damage; costs; expenses; and other claims for compensa-
tion), arising out of or in connection with the sale of any Pilot RC. product (including any mis-
representation (unless fraudulent); any breach of an implied or express warranty, condition or
other term; or any breach of a common law duty), in an amount exceeding the price of the Pilot
RC. product giving rise to the claim, except as expressly agreed in writing by Pilot RC.
9

Hardware items included in kit:
1. Push Rods, threaded ends with bolts for Ailerons, Elevators and
Rudder.
2. Mounting bolts and washers for Stabilizer.
3. G-10 Control Horns.
4. G-10 Servo arms.
5. Mounting bolts for canopy.
6. Nylon bolts for attaching wing.
7. Carbon fiber Tail wheel assembly with aluminum steering peg.
8. Carbon fiber landing gear and spinner.
9. Bolts and blind nuts for mounting landing gear.
10.Axles, wheel collars, wheel pant attaching screws with blind nuts.
11.Wheels.
12.Hinges (installed)
13.Servo plug security clips.
14. Rudder steering cable, brass tube cable crimps & cable swivel
turnbuckles.
15. Tank with Fuel Dot and Tygon tubing. (Installed)
Items you need to buy:
1. Engine with muffler (50-60 CC)
2. Propeller to suit engine.
3. 6 channel Transmitter, Receiver and Servos.
4. Batteries.
5. Servo Extension wires.
6. Switch.
7. Kill Switch.
8. Tie wraps.
9. Foam wire holders.
10. Additional washers.
11. Foam rubber.
12. Servo tape.
13. NyRods.
14. Push rod quick connects.
15. Pilot and instrument panel.
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