arf YAK55M 60CC User manual

ARF MODEL
YAK55M 60CC
Instruction Manual

Dear Customer,
Thanks for purchasing this newly designed YAK55M 6 CC aerobatic RC airplane. The weight is
approximately 18Lbs（8 g）. It’s good for IMAC and free style flying. It’s a beautiful plane with amazing
flight performance.
The newly released Yak55M 6 cc is desinged to accommodate twin gas engine. It’s covered with genuine
monocote, and comes with good quality accessories, including carbon fiber wing tube, carbon fiber landing
gear. We hope you enjoy this plane.
The new YAK55M 6 CC has the following improvements:
1. The newly released Yak55M 6 cc is desinged to accommodate twin gas engine
2. Control services is larger than Previous versions. Up to 6 degrees of throw on all control surfaces. Best
for more vibrant aerobatic flight.
3. Improved wheels with more durable materials, and filled with rubber.
4. Improved new Dual Fiberglass horn assembly
5. Improved axles ,the material of the axle is stainless steel.
6. Include Side Force Generator’s(SFG)
7. This YAK new design with a longer fuselage moment arm aiding the tracking of the model, giving it rock
sold precision flight. Making it perfect for modern day flight schedules for IMAC and Freestyle
competitions.
8．Pocket Style Scale Hinging
9. The YAK is designed to directly accommodate KUZA® rudder servo tray.
1 . Including New KUZA Fuel Tank Assembly with aluminum tank cap.
A QUICK WORD ABOUT AFETY AND RADIO CONTROL FLYING MODEL
With radio control aircraft, like any hobby or sport, there are certain risks. The operator of these models is responsible
for these risks. If misused or abused, you may cause serious bodily injury and/or damage to property. With this in mind,
you will want to be certain that you build your model carefully and correctly. If you are not an experienced flier, have your
work checked and ask for help in learning to fly safely. This model aircraft is not a toy and must be operated and flown
in a safe manner at all times. Always perform a pre-flight check of the model including all control surfaces, proper
function of the radio gear, structure, radio range, and any other area relating to the safe operation of this aircraft.

Models are not insurable but operators are. You can obtain coverage through membership in the Academy of Model
Aeronautics (AMA). For an AMA information package call 1-8 -435-9262, ext. 292 or visit the AMA website at
"www.modelaircraft.org".
By the act of using the final assembled model, the purchaser/operator accepts
all resulting liability.
ARF MODEL WARRANTY AND RETURN POLICY
We guarantee that the plane is in perfect condition at purchase. The warranty will be voided after
modifications and usages. If you have any questions or find any issues, please contact the distributors in
your area.
PECIFICATION
WING SPAN:91"(231 mm)
LENGTH:89"(226 mm)
WING AREA:15 sq in(96.8sq dm)
FLYING WEIGHT: 17-18.5lbs(77 -84 g)
ENGINE：5 -7 cc gas DLE55 DLE61 DA5 DA6 GP61
Electric Power：
Hacker Q8 -8M with 12S 5 mah 24x1 prop
Or other 4 Watt electric motor
ESC:16 A
Radio: 4+ Channels
RADIO:4+CH/5-6S
FEATURE INCLUDED
Newly designed structure
Two pieces removable wings & stabs

PVC canopy
• Pocket Style Scale Hinging
• Larger aileron and elevator design for excellent 3D aerobatic flying
• Removable rudder
• Includes Side Force Generator’s(SFG)

• CNC anodized aluminum Canopy Bolts
• Full length Tuned pipe tunnel designed into fuselage
• Adjustable pushrods for easy fine tuning(Includes wrench)

• Servo extension safety connector clips
• High performance cap head bolts
• Honeycomb board carton packing for safer transportation

• High quality 3mm ball links assembly
• New dual fiberglass horn assembly

• Carbon fiber tail wheel assembly
• High-quality durable rubber wheels
• Improved new Axles (the material of the Axle is stainless steel )

• Carbon fiber landing gear
• Increased diameter carbon fiber wing tube than previous V1 version.
• Two Carbon fiber stab tube

• The YAK is designed to directly accommodate KUZA® rudder servo tray.
• New KUZA Fuel Tank Assembly with aluminum tank cap

cheme A : Red/White/ blue

cheme B : Yellow /black/ red

Items Required to Complete This Model:
• 5 -7 CC Gas engine and exhaust
• Appropriate propeller for your Motor
• All required engine and exhaust mounting
hardware
• Ignition battery and switch
• One quality throttle servo and appropriate
servo arm
• 4Pcs high quality metal gear servos or better
for the ailerons and elevators
• Appropriate servo arms for the above
• Servo wire extensions. Recommends two 24”,
One 18”, two 12” extensions
• Two switches with charging jacks for the Rx
• Two high quality Rx batteries of significant
capacity to power your choice of servos.
• One Receiver of your choice
hop upplies/Tools
• Covering Iron and heat gun
• Assortment normal hobby tools such as
screwdrivers, hobby knife, drill and drill bits,
pliers, etc.
• Thick and Thin CA adhesives
• 3 minute Epoxy
• Isopropyl alcohol
• Ruler or tape measure
• Blue thread-lock or equivalent
Note: As with all kits, it’s a good idea to read all the instructions and study the parts before you begin
construction. Handle the parts of this kit with care so you do not damage any of the structure or covering.
Inspect all the parts for any shipping damage and report any issues to as soon as you can. Make sure you have
a flat and sturdy workbench and follow all safety advice for the tools and adhesives you plan to use.
AIRCRAFT COVERING
1. With all ARFs, varying temperatures and storage delays can cause covering material to loosen over time
and transportation. recommends lightly going over all the covering with a covering iron set at medium
temperatures. Be sure to use a soft cover over your iron so you do not scratch the covering surface.
Be sure you go over all seams and edges of the covering to assure it is secure to the airframe and other
covering. Be careful not to apply too much heat or you may cause bubbles or damage to the covering.

A heat gun may also be used along with a soft cotton cloth to shrink and adhere the covering. Again,
be extremely careful when using a heat gun.
2. Be sure to seal any exposed wood with a thin coating of epoxy to prevent engine oil from soaking
in. This is especially important around the engine compartment and servo openings with exposed
areas.
3. Some modelers prefer to seal the hinge gaps using strips of appropriate covering or clear trim tape. We
have found this to be helpful with models intended for higher speed flight or models with unusually
large hinge gaps. aircraft utilize a very tight double beveled hinge line and do not normally require this
step. Sealing the hinge gaps is therefore left as an option for the modeler.
Please locate the accessories before assembly:
New Expoxy horn kits (Bag No. KA 5CA) : 8 single horns for ailerons and elevators. 2 dual horns for
rudder.
There is a layer of protection film on the horns. Please remove the film as shown following picture.

Make sure to sand the horns so the surface is rough to glue correctly.
Pushrods(Bag No. KA 5CBG3) Four 3x61mm pushrods for ailerons. One 3x125mm pushrods rudder
（Pull-push style）

Pull-pull assembly kits for the rudder. (Bag No. KA 5CD)
Ball link assemblies (Bag No. KAG 131): 8 for ailerons and elevators.
6 Servo extension safety connector clips (Bag No. KAG 21)

Main rubber wheels (Bag No. KAG 14B)：2PCS
New stainless steel Axle kits (Bag No. KA 5CH): 2PCS
New Carbon fiber tail wheel assembly. (Bag No. KAG 1 4)

4mm ALU canopy bolts & 12mm PTFE washers (Bag No.KAG 43)
Side force generators (Four 3x2 mm Hexagon bolts & 4 Washers)
Bolts for landing gear: 4(4x2 mm) hex bolts and 4(M4) stainless steel self-locking nuts & 4 washers

Bolts & washers for cowl: 4(3x16mm) Hexagon bolts and 2(1 mm) PTFE washers and 2 wsahers
4 allen keys(Bag No. KA 5CE)
Bolts & washers for stab tails: 4(3x12mm) Hexagon bolts and 4(1 mm) PTFE washers

Washers for gas engine: 12(2 mm) POM washers
Wing Assembly
1.Aileron push rod linkage set. 3x61mm Pushrods for aileron.
2.It is much easier to install the twin control horns before installing the wing. Locate the fiberglass aileron
control horns, ball links, and associated bolts and nylon-insert lock nuts. Use some fine sandpaper to