3D Hobby Shop 57" Extra 330 SC User manual

Note: For tips, tricks, and important building techniques, please refer to our Build Videos located on the 3D Hobby Shop Website
The videos are located on the 33” Extra 330 SC product page in the ‘Foamies’ Category
www.3dhobbyshop.com
3D Hobby Shop
603 FM 2093
STE 1303
Fredericksburg, TX 78624
Ph: [phone]
33” Extra 330 SC
33” Extra 330 SC
Assembly Guide
Photo by: Eric Runfeldt (PrkFlyrRic)
Photo by: Eric Runfeldt (PrkFlyrRic)

INTRO
INTRODUCTION
Thank you for purchasing this 3DHobbyShop Foam RC aircraft kit If you have any issues, questions,
concerns or problems during assembly, please contact our technical support department online at:
www 3dhobbyshop com or 1-830-990-6978 10am-5pm Central M-F
We highly recommend visiting www RCGroups com for RC tips, tricks, and information
IMPORTANT NOTE – We strive to provide the absolute best-quality foam aircraft on the planet However,
the ultimate success or failure of this aircraft is dependent upon proper assembly by you This manual is
sufficient if you have assembled foam aircraft before If this is your first foam or 3D aircraft, please watch
all of the build videos on the 33” Extra 330 SC product page on www 3dhobbyshop com
SAFETY IN ASSEMBLY
During assembly of this aircraft, you will be asked to use sharp knives and hobby adhesives Please
follow all safety procedures recommended by the manufacturers of the products you use, and always
follow these important guidelines:
ALWAYS protect your eyes when working with adhesives, knives, or tools, especially power tools
Safety glasses are the best way to protect your eyes
ALWAYS protect your body, especially your hands and fingers when using adhesives, knives, or tools,
especially power tools Do not cut toward exposed skin with hobby knives Do not place hobby
knives on tables or benches where they can roll off or be knocked off
ALWAYS have a first-aid kit handy when working with adhesives, knives, or tools, especially power tools
ALWAYS keep hobby equipment and supplies out of the reach of children
SAFETY IN FLYING
SAFETY NOTICE: This is NOT a toy! It is a very high-performance RC airplane capable of extreme
maneuvers It should only be operated by a competent pilot in a safe area with proper supervision
ONLY fly your aircraft in a safe, open area, away from spectators and vehicles–and where it is legal to fly
NEVER fly over an unsafe area, such as a road or street
NEVER fly near overhead power or utility lines If your airplane ever becomes stuck in a line or a tree,
DO NOT attempt to retrieve it yourself Contact authorities for assistance in retrieving your aircraft
Power lines are DANGEROUS and falls from ladders and trees CAN KILL!
NEVER fly too close to yourself or spectators Spinning propellers are DANGEROUS!
NEVER run your motor inside a house or building with the propeller attached – Remove the prop for
safety
ALWAYS fly within your control Always follow manufacturer’s instructions for your radio system
ALWAYS obtain proper insurance before flying – contact the AMA at www modelaircraft org
TOOLS AND MATERIALS REQUIRED FOR ASSEMBLY
• Welders Adhesive - Available from 3D Hobby Shop or most large hardware stores
• CA Adhesive – Medium CA, and Accelerator
• Hobby Knife with plenty of extra sharp blades
• Phillips Screwdriver, Pair of Small Pliers, Side Cutters
• Ruler and Scissors
• Heat gun or Lighter to shrink heat shrink tubing

INTRO
ASSEMBLY INSTRUCTIONS
Read completely before starting assembly!
Unpack your airplane and examine the components Check for damage of any kind If you have damage,
please contact 3DHobbyShop to discuss Please also verify at this time that you also have all of the parts
in the Kit Components section listed below Note that we have included some extra hardware pieces in
your kit You should keep these as spare parts to repair your foamy in the future if necessary
IT COMPONENTS
All of the following parts are included with your 33” EPP Extra 330 SC Kit:
• 8x EPP Foam Pieces (1x of: Horizontal nose, Vertical Fuse Top, Vertical Fuse Bottom, Rudder,
Wing, Horizontal Fuse, Elevator, Motor Mount)
• 1x 6mm Carbon Fiber Wing Spar
• 1x 3mm Carbon Fiber Stab Spar
• 1x Plywood Hardware Kit Sheet
• 3x Control Horns for Ailerons and Rudder
• 1x Control Horn for Elevator
• 1x Servo Horn for Aileron Servo
• 2x Servo Horn for Elevator and Rudder Servo
• 1x Plywood Motor Mount
• 1x 1m Carbon Fiber Rod (for bracing)
• 2x Carbon Fiber Rod for Aileron Push Rods
• 1x Carbon Fiber Rod for Rudder Push Rod
• 1x Carbon Fiber Rod for Elevator Push Rod
• 1x Metal Wire for Z-Bends
• 1x Strip of Heat Shrink for Push Rods
• 1x Strip of Elastic Tubing for Propeller Mounting
Required Electronics
Please take this time to gather and organize the electronics you will be using in your 33” Extra 330 SC
The following electronics are required:
• Motor: 65-75 Watt Brushless Outrunner (Hacker A10-9L Recommended)
• ESC: 7-12A Brushless ESC (Hacker X-7 Pro ESC Recommended)
• Servos: 3x 14-17 oz/in torque (Hitec HS-45HB Recommended)
• Battery: 2s 300-650mAh LiPo
• Propeller: 8x4 3 GWS
• Other: 4ch Radio & Receiver (2 4 GHz 7ch Radio w/ Micro Receiver Recommended)
3D Hobby Shop
603 FM 2093
Suite 1303
Fredericksburg TX 78624
Ph: (830) 990—6978
www.3DHobbyShop.com

STEP A
Hinging is one of the most important parts of assembly on an EPP Foamy, so it is very important to
perform this step correctly If performed incorrectly, your control surfaces may bind and not deflect
properly You will be using Welders Adhesive to hinge all of the control surfaces on your aircraft Once
dry, Welders Adhesive is flexible and will act as a non-binding hinge Your EPP Foamy comes with
pre-beveled control surfaces which are beveled at the factory for maximum deflection You do not need
to perform any additional cuts on any of the control surfaces
On a flat surface, align the Elevator to the rear of the horizontal fuselage piece and secure the parts to
your building table with the top of the pieces facing up Heavy weights work well to keep the parts from
moving once aligned
Step A-01: Hinging Introduction
Apply a 1/8” bead of Welders Adhesive down the Elevator hinge line
Step A-02: Hinging - Applying Glue to Elev tor Hinge

STEP A
Spread the glue out with a used hobby-blade
Step A-03: Hinging - Cre ting the Elev tor Hinge
Repeat Steps A-01 through A-03 for both ailerons as shown
Step A-04: Hinging - Aileron Hinging

STEP A
Repeat steps A-01 through A-03 for the TOP HALF of the rudder only
You will hinge the bottom half of the Rudder during a later part of the assembly
Step A-05: Hinging - Rudder Hinging (Top H lf)
Once satisfied, let the Elevator, Ailerons, and Rudder hinges sit for approximately 1-2 hours to allow the
glue to dry Allowing the glue to cure is very important You can damage your hinges if you start moving
them before the glue is cured The glue is dry when it is no longer sticky when you touch it If hinged
properly, all control surfaces will have at least 45 degrees of throw once hinged You may notice that the
hinges may be a bit stiff at first, but they will loosen up over time
*Builders Tip* This type of hinging system works well because it is easily repairable If a hinge joint ever
breaks due to a crash, you can use this process to apply a new hinge over top of the old hinge, and be
flying again in no time
Step A-06: Hinging - Completion

STEP B
Your horizontal fuselage should now be in 3 pieces (The nose piece, a complete wing, and a rear
horizontal fuselage with elevator) Using Welders Adhesive, glue these three pieces together
Apply a bead of Welders Adhesive to the rear of the Horizontal Nose where it meets the front of the
wing Temporarily attach the Horizontal Nose to the Wing and remove Let the Welders Adhesive set-up
on both sides of the glue joint for 2-3 minutes Once the glue has some time to set-up, permanently attach
the horizontal nose to the front of the wing and lay down on a flat surface Allow 1-2 hours dry time
Step B-01: Horizont l Fusel ge Assembly - Nose Piece
Repeat Step B-01 to attach the rear horizontal fuselage to the wing
Once satisfied, leave sitting on a flat horizontal surface for 1-2 hours to dry
Step B-02: Horizont l Fusel ge Assembly - T il Section

STEP B
The wing spar is installed on the bottom of the horizontal fuselage into a pre-cut slot
Start by removing the excess foam from the wing spar slot, and test fit the wing spar in place
Rough up the sides of the carbon spars with a some sand paper or a sanding stick Then, apply a bead
of Welders Adhesive to each side of the wing spar and slide the wing spar in to the wing spar slot Spread
out the excess glue with a used razor blade in the same way you hinged the control surfaces Once
satisfied, spread a generous amount of glue around the ends of the wing spar This will help prevent the
wing spar from breaking out in a crash
Step B-03: Horizont l Fusel ge Assembly - Wing Sp r
Repeat Step B-03 to install the Elevator Spar into the pre-cut slot in the bottom of the elevator
Allow glue to dry for approximately 1-2 hours
Step B-04: Horizont l Fusel ge Assembly - Elev tor Sp r

STEP C
Now, you will attach the lower half of the vertical fuselage to the horizontal fuselage Apply a bead of
Welders Adhesive to the Lower Vertical Fuselage where it meets the horizontal fuselage, and temporarily
install Remove the vertical fuselage and let the Welders Adhesive set-up on both sides of the glue joint
for 2-3 minutes Permanently attach the lower half of the Vertical Fuselage to the bottom of the
Horizontal Fuselage, ensuring that the parts are perpendicular Allow 1-2 hours to dry
Step C-01: Lower Vertic l Fusel ge Assembly
We have included a 1m long piece of Carbon Fiber Rod in your Foamy Kit for Fuselage Bracing
Cut the long carbon rod into 7 pieces with the following lengths:
1x 7 25”
1x 6”
1x 5 5”
2x 5”
2x 4 75”
Step C-02: Lower Vertic l Fusel ge Assembly - C rbon Br cing

STEP C
On the bottom of the horizontal fuselage and on the sides of the vertical fuselage, you will see some small
dots along the edges These small dots are where your carbon braces will attach Set your fuselage
upside down on a flat surface, and start by attaching the two 5” rods from the tips of the horizontal
stabilizer to the bottom of the vertical fuselage You do this by poking the carbon into the foam 1/16”
Step C-03: Lower Vertic l Fusel ge Assembly - C rbon Br cing
Follow step C-01 and install the rest of the carbon rod pieces you cut earlier Once all pieces are in
place, ensure that the vertical fuselage is still perpendicular to the horizontal fuselage, and then apply a
generous dab of Welders Adhesive at each point where a carbon rod meets the fuselage
Allow to dry for 1-2 hours
Step C-02: Lower Vertic l Fusel ge Assembly - C rbon Br cing
5”
5” 4.75”
6”
5.5”
4.75”
7.25”

STEP D
Start by removing the Aileron Control Horn from the supplied ply-wood hardware kit, and find the slot in
the ailerons where the control horns will be installed Control horns are installed in a similar fashion to the
wing spar Apply a bead of Welders Adhesive to each side of the bottom of the control horns, and insert
into the Aileron Control horn slot on the TOP of the aileron Spread out excess glue that squeezes out
Install a control horn into both ailerons Allow glue to dry for 1-2 hours
Step D-01: Control Horn Inst ll tion - Ailerons
Remove the ply-wood aileron servo arm from the hardware sheet and attach to your servo’s supplied
plastic servo arm with the servo screws supplied with your servo Once attached, you can clip off the end
of the screws with a pair of side-cutters Install the servo arm onto the servo
Step D-02: Servo Inst ll tion - Ailerons

STEP D
Apply a generous amount of Welders Adhesive to the sides and bottom of the Aileron Servo, and slide it
into the pre-cut slot in the TOP of the horizontal fuselage
Step D-03: Servo Inst ll tion - Ailerons
Using side-cutters, cut a 1 0” piece of piano wire off of the long piece of piano wire in your kit
Using two pair of needle-nosed pliers, create a “Z” at one end of the 1 0” piece of wire
You need a total of 4 of these 1 0” Z-bends for the Ailerons
Step D-04: Servo Inst ll tion - Z-Bends

STEP D
Tape the ailerons to the horizontal fuselage so that they are parallel to the horizontal fuselage
Cut a V-shape out of a piece of scrap ply-wood or card-stock
This piece will be used to protect the foamy in the next step
Step D-05: Servo Inst ll tion - Control Rods
Cut two pieces of heat shrink tubing that are approximately 1” in length Slide these onto the carbon fiber
Aileron control rods Install one of the Z-bends into an aileron control horn and another into the same
side of the servo arm (See Setup Sheet at end of Manual for the recommended holes to use)
Put the carbon rod in place, and slide the heat shrink over the Z-bends to hold the carbon rod in place
Step D-06: Servo Inst ll tion - Control Rods

STEP D
Center the servo, and verify again that the aileron is parallel to the horizontal fuselage, and then slide the
V-shaped protector that you made earlier around the control horn and use a heat gun or lighter to shrink
the heat-shrink tubing around the carbon rod and Z-bend on both ends
Repeat this process for the other aileron
Step D-07: Servo Inst ll tion - Control Rods
Once you have shrunk the tubing on both ailerons, adjust the length of the control rods as needed
(by sliding the z-bends forward and backward) until the ailerons are centered and are both parallel to the
horizontal fuselage Once satisfied, apply some Medium CA where the Z-bends are touching the carbon
rod, and allow to cure This will lock the Z-bends in place and prevent them from moving anymore
Step D-08: Servo Inst ll tion - Control Rods

STEP D
Repeat step C-01 to install the top of the vertical fuselage onto the horizontal fuselage
Once installed, ensure the elevator is still able to achieve 45degrees of throw
If it cannot, trim any excess foam necessary to achieve maximum throw
Step D-09: Top Vertic l Fusel ge Inst ll tion
Repeat step A-01 through A-03 and hinge the bottom half of the rudder
Using a piece of tape on the opposite side of the hinge line will help hold the rudder hinge together
Step D-10: Top Vertic l Fusel ge Inst ll tion - Hinging Rudder Bottom

STEP D
Repeat step C-01 to install the foam part of the motor mount onto the fuselage Glue should be applied
everywhere that the foam motor mount will touch the horizontal and vertical fuselages
Step D-11: Top Vertic l Fusel ge Inst ll tion - Motor Mount
This step is optional If you are installing the Hacker A10-9L motor with the fiberglass x-mount, please
skip ahead to Step E-01 For all motors that have a bolt-on x-mount, you need to follow this step
Apply a generous amount of welders adhesive to the back of the ply-wood motor mount piece included in
your kit Temporarily install the ply-wood motor mount to the front of the foam motor mount Remove and
let the glue set up for 3-5 minutes Permanently install the ply motor mount piece and allow to dry
Step D-12: Top Vertic l Fusel ge Inst ll tion - Motor Mount (OPTIONAL)

STEP E
To install any bolt-on motor, simply install the X-mount to the back of your motor, center it on the
ply-wood motor mount installed in step D-10, and screw in place with small wood screws
To install the recommended Hacker A10-9L, first install the phenolic x-mount to the motor Then, using
Welders Adhesive, apply a bead of welders glue on each leg of the x-mount, and temporarily install to the
foam ply-pieces and remove Allow the glue to cure for 3-5 minutes and then permanently install,
ensuring that the motor is centered on the motor mount Allow to cure for 20-30 minutes
Step E-01: Electronics Inst ll tion - Motor
Repeat Step D-01 to install the short control horn into the TOP of the elevator
Notice the notch in the elevator control horn fits around the elevator spar
Step E-02: Electronics Inst ll tion - Elev tor Servo

STEP E
Repeat Step D-02 to install one of the single-side servo arms onto the elevator servo
Step E-03: Electronics Inst ll tion - Elev tor Servo
Repeat Steps D-03 through D-08 to install the Elevator Servo and Elevator Servo Pushrod and Z-bends
Step E-04: Electronics Inst ll tion - Elev tor Servo

STEP E
Repeat Step D-01 to install a LONG control horn into the LEFT side of the rudder
This is the side OPPOSITE of the carbon bracing
Step E-05: Electronics Inst ll tion - Rudder Servo
Repeat Steps D-02 through D-08 to install the Rudder Servo and Rudder Servo Pushrod and Z-bends
Step E-06: Electronics Inst ll tion - Rudder Servo

STEP E
Using either bullet connectors or direct-soldering, connect the speed controller to the motor and adhere
the speed controller to the fuselage with Welders Adhesive
Step E-07: Electronics Inst ll tion - Speed Controller
Adhere your receiver to the side of the fuselage using Welders Adhesive
You can route wires to your receiver by poking small holes in the fuselage and running the wires through
the holes The easiest way to poke holes is with a sharp hobby blade
Step E-08: Electronics Inst ll tion - Receiver