30cc MXS-Bach
30cc MXS-Bach - Red - FUSION CONCEPT
Safety Precautions
Protect Your Model, Yourself and Others... Follow this Important Safety
Your RedWing RC 30cc MXS-Bach is not a toy, but rather a sophisticated, working model that
functions very much like a full size airplane. Because of its realistic performance, the RedWing RC
30cc MXS-Bach, if not assembled and operated correctly, could possibly cause injury to yourself or
spectators and damage property.
It is highly recommend that before your maiden flight of your RedWing RC 30cc MXS-Bach you have
an experienced, knowledgeable modeler do an extensive “pre-flight” inspection of your RedWing RC
30cc MXS-Bach for an added safety percussion.
For information on flying clubs in your area, you can contact the national Academy of Model
Aeronautics (AMA), which has more then 2,500 chartered clubs across the country. Contact AMA at
the address or toll-free phone number below:
Academy of Model Aeronautics
5151 East Memorial Drive
Muncie, IN 47302-9251
Ph. (800) 435-9262
Fx. (765) 741-0057
Or visit the Internet at www.modelaircraft.org
Contents of Kit
All Our planes come with carbon fiber parts ( Spinners, Gear, Arms, Tubes). They are
high quality with most features done for you already.
Pre glued cowling ring with blind nuts mounted to the fuselage
Canister Installation position if fuselage along with
reinforced landing gear mounting area
Removable wings and Stabs with carbon “anti- Roll”
Pins pre installed
laser etched engine mounting template for the DLE30,
DLE 35RA, or the PTE36
Pre installed Pull Pull wire with ball links on rudder
Pre Cut Control horn slots
Floor and dashboard for cockpit pre installed
Main Landing Gear and Tail Wheel
Main Landing Gear Installation
All parts for the Main landing gear
Install the landing gear in the pre drilled holes with
the supplied “Phillips” head screws (with built in
washer) and locking nuts.
Use a 9/32 Sockets to tighten locking nuts along
with using Blue Loctite on threads
Install the landing gear spring steel axles with
locking nuts.
Use a Metric 14 Wrench and a ½ inch socket to
Use a Dremel and a grinding disk to grind a flat
spot for the set screw to rest against ensuring a tight
Install the wheel and tighten the collar set screws
using Blue Loctite ensuring that the wheel freely
rotates on axles.
Locate the blind nut and 2.5 Alan bolts.
Press the blind nut into the wheel pants as
shown and install into the pre drilled holes on
landing gear with Blue Loctite.
Optional steps
use a Dremel tool with a cutting head to cut down the
bolt that holds on the wheel pants for clearance of the
Use your favorite type of fuel proofing product to fuel
proof the exposed landing block to ensure no fuel
soakage from your exhaust.
Tail Wheel Assembly
All parts for the tail wheel
Locate the hard block on the bottom of the
rudder and drill a 1/8 inch pilot hole and enlarge
to 7/32 inch for the steering tube
◦ DO NOT glue at this time until tail wheel is
installed and completed
Assembled tail wheel parts
Assemble the tail wheel using a 10mm socket
and a 7/16 inch wrench and tighten to the
carbon fiber tail wheel mount
Use the tail wheel bracket as a template, center the
bracket, mark and pre drill holes using a 1/16 inch
drill bit for the mounting screws
Use the tail wheel screws to open the pre drilled
holes in step above.
◦ Wick Thin CA into the holes
Once CA is dry attach the Tail Wheel mount and tail wheel to fuselage. Install the
steering arm into the rudder steering tube and Epoxy the steering tube into place in the
earlier drilled 7/32 inch hole.
Main Wing Assembly
All parts for the tail wheel
locate the pre cut control horn slots and the control
horns with the pre installed ball link
use course, 60 grit sand paper or block and sand the
lower unpainted portion of the control horn to
ensure a good bond between the glue and surface of
the control horn ( remove the shiny look)
tape off the pre cut control horn slots and apply your choice of gluing agent to the slot
and ensure the painted control horns set completely into the slot before glue cures.
(Gorilla Glue works well for this as it expands and holds well)
locate either the internal wing servo mount or the external servo mount and open the
covering. (internal servo mount is outlined in the blue tape below) Use an hobby knife to
open the internal servo hatch or a heated soldering iron to open the external mounting
prepare your servo buy centering it and adding your control horns along with a 6”
Twisted Wire servo extension and a servo safety clip (sold separately at RedWing RC)
install the servo into the wing and drill holes in for the mounting screws and harden with
thin CA.
Glue control surfaces
gather the Robart style hinges, masking tape, hole punch and choice of glue (again
Gorilla Glue works very well here)
◦ Note: Highly recommended that you roughen the hinge with course 60 grit sand
paper to allow for better adhesion with the glue and wood blocks inside wing
use the hole punch to make a hole in the center of the tape. Place the hole over the pre
drilled hinge holes on the wing and control surface. Glue the roughened Robart style
hinge into the holes ensuring that the hinge is operating the correct way and is set at a 90
degree angle to the center line of the wing/control surface.
◦ Recommended to glue one half at a time. Use tape to hold control surface to the wing
to ensure that the glue does not push the two apart.
Prepare the Turn buckle rods by installing the ball link and install on servo arm
◦ the turn buckle wrench from RedWing RC makes this and other field adjustments a
Locate the SFG (Side Force Generators) location in the ends of the wings on the second
rib. Use the heated soldering iron to open the slots in the wing.
Insert the pre painted metal SFG mounts through the holes you just made and run the
bolts through the SFG and tighten into the mounts both top and bottom of wing.
Repeat steps above for second wing.
◦ Install the wings, wing tubes, and wings bolts on the final assembly
Rudder Installation
All parts for the Rudder
Find and open the slots for the rudder control horn. Test fit the control horns on both
sides and measure the correct length and trim the longer part on the non painted side of
the control horn.
Prepare the control horns and slots as you did in the wing installation. Once your
comfortable with the way everything fits glue in the control horns, hinges and rudder to
the fuselage
locate the re installed Pull Pull wire at the rear of the
fuselage. Remove tape and thread the brass wire
screws into the ball links attached to the control horn
on both sides.
Just like in the wing installation drill and tap the servo
screws and then wick thin CA into the holes to harden
wood, then re-install servo
Connect the rudder servo arm to the servo and the Pull
Pull ball link to the ends. Crimp the Pull Pull brass
collars and wick thin CA into them.
Pull the wire tight while ensuring the servo and
rudder are in there centered position thread and crimp
the brass collars along with wick thin CA into them.
Ensure that the wires are tight but not stressing the
servo and cross within the fuselage
Stabilizer Installation
All parts needed
Find pre cut slots for the rudder control horn, Test fit the control horns on both sides.
Prepare the control horns and slots as you did in the wing and Rudder installation. Once
your comfortable with the way everything fits glue in the control horns, hinges and
Elevators to the stabilizer fins
Locate the servo mounting location on the fuselage (both sides) use a heated soldering
iron to open the holes for the servos. Pre drill and harden the servo screw holes as done
in the previous steps and install the servos with the 18” twisted wire servo extensions
and secure with safety clips. Run the wires inside to fuselage in the designed servo lead
insert the carbon fiber stabilizer tube into the pre drilled
Locate the four (4) 5/64” screws and
use Blue Loctite on the threads and
attach the Stabilizers to the side of the
Connect the control horns to the centered servo using the
provided ball link
Engine Installation
Install your choice of motor, DLE30, DLE35RA, or the PTE36 (pictured above)
Locate the laser etched motor mount standoff drill
points. Use a smaller bit and increase size as you get to
the correct diameter for the screws in your standoffs
Install the Standoff's with provided bolts. Install the
bolt into a flat washer then insert into the firewall, then
drop Blue Loctite on the threads and tighten standoff.
Repeat until all four are installed.
Temporarily mount the motor on the standoff's, mark the location of the fuel line and
carburetor throttle arm. Remove motor and drill to appropriate size for fuel line and your
throttle push rod.
◦ Attach a ball link to the throttle push rod and secure to the carburetor throttle arm
with a bold and nylon locking nut
Locate the pre glued throttle servo mount bracket and
find an ideal location inline with the throttle push rod
installed earlier.
Once you have located an optimal location for the servo mount glue into place with 15
minute Epoxy.
◦ Once it has dried install your throttle servo with the arm facing towards the motor or
firewall. Drill your servo screw holes and harden as listed before. Hook up servo to
your control arm on the servo with a Z-bend and plastic wire keeper
Locate the Engine access hatch and use self-ta screws to tightly secure to the engine
mount mount box.
Fuel Tank
Your RedWing RC MSX-Sbach comes with a pre plumbed fuel tank per-installed for
you. If you chose to use this or an upgraded fuel tank the process is the same to
Locate the carburetor supply nipple on the tank and run your line through the firewall to
the carburetor
Run the vent and fuel supply line to the bottom and side of the fuselage place a vent line
end on the vent line and attach to the fuselage. Use a fuel dot on the fuel fill line.
Ensure that on the fuel fill line that you install a Gas safe fuel filter inline.
Muffler and Canister
Install the muffler with the provided Muffler bolts using Blue Loctite on the threads and
ensure that the muffler gasket is installed between the motor and the muffler.
◦ Install the motors electronic spark control box to the side of the motor box securing it
with Velcro and ensuring that you have protective rubber foam between the box and
motor mount box
If your not going to install a canister locate the canister bay
cover and install with self-tapping screws to seal off the
motor compartment from inside the fuselage
Remove the covering from the pre cut canister air exit
opening and ensure the edge has been sealed. Use a heated
soldering iron with accomplish this for you
Bend the flexible manifold to connect to the canister
muffler. Mark and trim the excess pipe to fit.
◦ Tighten the manifold bolts and secure with Blue
Use the silicone coupler and clams to join the manifold
and the canister muffler
Canopy and Cowl installation
locate the 2.5 metric Allen head screws with the rubber
washer and metal washer inside. Set up your screws as
Locate the hole on the fuselage for the wing bolts and open them with a heated soldering
iron. Use scrap cardboard of stiff paper to mark the location of the cowl mounting plate
and transfer that to the cowl, drill a 1/8inc hole for the cowl screw to go though. Place
the top cowl screws into the pre drilled hole and tighten.
◦ Use this step for the holes for the muffler exit and spark pug hole if needed
Installation Radio
Install your radio system, engine disrupt safety switch, flight battery, and telemetry
module, and misc radio equipment.
◦ Center your trims and manually center all control surfaces with the turn buckle
wrench. Set-up your rates (see below)
▪ Recommended Throws: adjust to liking as you fly
• Low Rates Settings | High Rate Settings
• Rudder: 30 degrees, 20% expo | 40 degrees, 35% expo
• Ailerons: 30 degrees, 25% expo | 50 degrees, 40% expo
• Elevator: 40 degrees, 20% expo | 55 degrees, 40% expo
Break in the engine as stated in the owners manual of the motor company.
Do a final and thorough inspection of the entire plane, control linkages,
control horns, control arms, servos, hinges, tail wheel, landing gear,
motor, prop, tank. Electronics!!!!!
Center of Gravity
(Recommended CG: 5.25" to 5.5" from the LE at the root of the wing)
Find the Center of Gravity
Mean Aerodynamic Chord (MAC)
One theory is that all aircraft should balance at a point defined as 25% of the Mean
Aerodynamic Chord, with no consideration given to tail area or moment arm. For the scale
model RC airplane, I prefer to take these facts into consideration.
When designing a scale model we do not have the ability to change dimensions or ratios-we
are restricted by our wish to build an accurate reproduction of the full size.
The formula I have used, came from a book written a few years ago by Gordon Whitehead
titled "Radio Control Scale Aircraft Models for Everyday Flying" ( A great book that every scale
modeler should own)
Here is the formula- CG POSITION = MAC/6+(3 X TAIL AREA X TAIL MOMENT ARM ) / 8 X
WING AREA. Note that the Moment Arm is defined as the distance from the 25% MAC of the
wing to the 25% MAC of the tailplane.
For a constant chord wing the MAC is obvious but for tapered or swept wings it is not
so easy. However a simple graphical method is shown here•
Draw or trace the wing shape as shown. Then extend the Leading Edge ( L.E.)
and Trailing edges to the center line of the plane. Also square off the tips. Now
extend the opposite chord lengths as indicated on the drawing; i.e. lengthen tip
chord B by root chord A and A by length B. The four extreme points are then
connected by diagonals. The point where these lines intersect will indicate the
Mean Aerodynamic Chord (MAC). To find the 25% of MAC position we must
measure 25% of the MAC back from the L.E. and extend this to the aircraft
center line.
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