Goldwing RC SBACH342 30CC User manual

GOLDWING RC
73in SBACH342 30CC & 120E
Giant Scale Aerobatic Aircraft

Specifications
Wing Span: 73"(1860mm)
Length: 68"(1730mm)
Wing Area: 1025sq in(66.1sq dm)
Flying Weight: Gas Version is 9.7-10.6lbs(4400-4800g)
Electric Version is 9.3-10.1lbs(4200-4600g)
Glow: .91-1.20（2C） 1.10-1.40（4C）
Gas： 26CC-38CC Gas DLE30 DLE35
Electric Power：1900-2200Watt electric motor
ESC： 80-100A
Radio: 4+ Channels
Servos: 4-6 servos required 160 oz to 330 oz (10-20kg/cm)
All contents copyright 2016, GoldWing RC
Version 1.0, Jan 2016
Dear Customer,
Thank you for purchasing the new Goldwing RC giant scale aerobatic aircraft. This manual covers the 73in
SBACH342 30CC and 120E aircraft. The new version 73in SBACH342 adopts cutting edge aerodynamic
features, such as streamlined canopy, aileron counterbalance, removable side force generators (SFGs) .The 73in
SBACH342 is also loaded with high-end accessories including genuine Oracover, CF landing gear, tail wheel
assembly and control horns. KUZA brand CNC Aluminium Backplate Hollowed-out Spinner is included as
bonus (limited quantities) for 120E version. 3in Painted carbon fiber spinner and KUZA new fuel Tank are
included for 30CC version.
A QUICK WORD ABOUT SAFETY AND RADIO CONTROL FLYING MODELS
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, correct 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 1-800-435-9262, ext. 292 or visit the AMA
website at "www.modelaircraft.org". Or if you are in any other country please contact the appropriate body.

By the act of using the final assembled model, the purchaser/operator accepts all resulting
liability.
Goldwing RC WARRANTY AND RETURN POLICY
GoldWing RC guarantees this product to be free from defects in both material and workmanship at the date of
purchase. This does not cover any parts damaged by use, misuse or modification. In no case shall liability
exceed the original cost of this kit. Because Goldwing RC has no control over the final assembly or
equipment/components used in the final assembly, no liability shall be assumed for any damage resulting
from the use of this model by the user. By the act of using the final assembled model, the user accepts all
resulting liability. If you should find any missing or damaged parts, or have any questions about this product,
please contact within 30 days of the purchase in order to be covered by our warranty. You may contact us at
[e-mail].
Included Features:
 Improved axles (the material of the axle is stainless steel )
 Flat nylon hinges for better flying strength
 Pre-hinged control surfaces
 Larger aileron and elevator design. Up to 60 degrees of throw on all control surfaces for excellent 3D
aerobatic flying
 Extra covering provided for small repairs and covered in genuine Ultracote / Oracover
 Aluminium hub rubber wheels
 Canopy hatch pins are made of nylon rods for better resistance aganist vibration
 Side force generators

 Two quick release canopy.
 New KUZA Fuel Tank with alloy tank cap for 30CC version

 Aluminium Backplate Hollowed-out Electric Spinner included for 120E version (Excellent cooling
effect for brushless motor)
 Including POM & ALU motor washers for 120E version
Carbon Fiber accessories version：
 Extra strength carbon fiber control horns

 One piece air foiled carbon fiber landing gear
 Carbon fiber tail wheel assembly with CNC machined metal parts, including the aluminium tail wheel
hub.
 3in Painted carbon fiber spinner for 30CC version

 Increased diameter carbon fiber wing tube over previous versions
Scheme A : White /red/black

Scheme B : White/Red / blue

Scheme C : Yellow /red/black

Items required to complete this model:
 26-38 cc gas engine with stock or aftermarket
exhaust system
 Appropriate propeller for your engine
 All the required engine and exhaust mounting
hardware
 Ignition battery and switch
 One quality throttle servo and appropriate
servo arm
 3 high quality metal gear servos of 80 in-oz or
better for the ailerons and elevators
 One high quality rudder servo of 160 in-oz or
better
 Appropriate servo arms for the above
 Servo wire extensions. Recommend KUZA
Twisted 22 AWG Servo Extensions (Not
included)
Two to three 12”(305mm) No. KAG002522
Two to three 18”(455mm) No. KAG002523
 Switches with charging jacks for the Rx
 Rx batteries of significant capacity to power
your choice of servos.
 Receiver of your choice
Required 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
 30 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. We recommend 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. Our 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 verify the accessories before assemble:
 Carbon Fiber control Horns (Bag No. KA03CA4) : 8 single horns for ailerons and elevator and rudder.
Sand the area of the horn that will be glued to help adhesion.
 KUZA 3” Aluminium Backplate Hollowed-out Electric Spinner for 120E version (Bag No. KAG0205)
Color： Scheme A\B\C is red

 KUZA new 360cc fuel Tank Assembly for 30CC version (including Aluminum fuel cap)
 Push rod kits: (Bag No. KA03CB3) Two 2.5x60mm Pushrods for aileron. Two 2.5x130mm Pushrods for
elevator.One 2.5x130mm for rudder（Pull-push style）
 Ball link assembly (Bag No. KAG00122): 8 for ailerons & elevator & rudder.

 Alu long arm kits: 4 single arms for ailerons and elevator and rudder.
 Servo lead safety clips：5 pcs (Bag No. KAG0021)
 Alu Main wheels：2pcs（Bag No. KAG0157）

 New axle kits (Bag No. KA03CH)
 Carbon fibre tail wheel assembly with CNC machined metal parts, including the aluminium tail wheel
hub. (Bag No. KAGC103)
 Extra covering provided for small repairs

 4 allen key wrench (Bag No. KA03CE)
 Side force generators (2 x 3x12mm hex bolts & 2 x 3mm stainless steel self-locking nuts & 2 x washers )
 Screews for landing gear: 4(4x20mm) hexagon bolts and 4 washers

 Bolts & washers for cowl: 4(3x14mm) Hexagon bolts and 2(10mm) PTFE washers and 2 wsahers
 20 POM & ALU washers for 120E motor
 Gas engine washers for 30CC version: 12(20mm) POM washers

 Spares bag(Two spare wing bolts & One spare tail wheel spring)
RUDDER ASSEMBLY
NOTE: There are pictures of different planes in this manual, however, this plane’s rudder is assembled
the same way.
1．It is much easier to install the twin control horns before installing the rudder. Locate the carbon fiber
rudder control horns, ball links, and associated bolts and nylon-insert lock nuts. Use some fine sandpaper
to roughen up the center areas of the two control horns so that the glue adheres better. Using a sharp
hobby knife or soldering iron remove the covering away from the slots in the rudder and trial fit the two
control horns.
2. Mix up some 30 minute epoxy and coat the inside of the slots and the center of the control horns. Hint: a
scrap piece of 1/16” ply, tooth pick, or old hobby blade can be used to coat the inside of the rudder slots.
Slide the control horns in place and make sure they are centered perfectly by using a ruler to measure
between the pivot holes and the hinge line. Wipe any excess glue off with isopropyl alcohol and paper
towels. Install the ball links, bolts and nuts into the holes to help assure alignment of both control horns
while the glue cures. Set aside until cured. NOTE: There are pictures of different planes in this manual;
however, this plane’s rudder is assembled the same way.

3． Apply 30 minute epoxy to hinges, then insert them into the hinge slots on the rudder, secure the rudder
with masking tapes, then allow the epoxy to dry.
4. The SBACH can use either closed loop or a rear push pull servo for the rudder. We recommend that you
balance the model assembled before choosing your servo placement.
5. The SBACH is supplied with a high quality set of pull-pull cables and ball-links.

6. Install your rudder servo into the precut locations in the fuselage. Using a fine drill pre-drill the holes and
drop thin CA into the holes to strengthen the wood. You will need 3 inch arms on the servo. Set up your radio
accordingly and center the rudder servo.
7．Aluminum dual servo arm are include in the kit, enlarge the control holes with 2.5mm drill bit.
8. The SBACH has the closed loop pre-installed and crimped at the rudder end. These can be connected with
the M2.5 bolts and nut. The wire will be left looped inside the fuselage and will need to be connected to the
servo arm.

9. Use your radio system to center the rudder servo and attach either the supplied arm or an appropriate arm
for your servo. Thread one of the ball links about half way onto one of the threaded couplers. Feed the loose
end of one of the cables through a brass tube and then through the threaded coupler. Holding the rudder
centered, adjust the cable length as tight as possible while checking the ball link position over the servo arm.
When satisfied with the position, pinch the cable around the threaded coupler and then feed the loose end
back through the brass tube. Loop the cable back through the brass tube as before and crimp the brass tube
three times just tight enough not to cut the brass tube but enough to securely hold the wire in place. Cut off
the excess cable with wire cutters. Wick thin CA into the brass tube to help hold the cable secure. Repeat for
the other cable. Hint: Once you have established the position of the threaded coupler on the cable, you can
remove the ball link from the rudder horn to give you more working slack in the fuselage. Re-install the ball
link prior to setting the other cable.
10. Check the operation of the rudder using your radio and make sure there is no binding and the cables are
adjusted properly. You may have to tighten the cables after a few flights as they may stretch slightly from the
initial installation.
11．We recommend using KUZA 3.25” aluminium CNC servo arm (sold separately) for rudder control.