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3D Hobby Shop 330SC Assembly Manual

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Assembly Manual- 72" Extra 330SC
Designed by Scott Stoops
Thank you for purchasing this 3DHobbyShop ARF RC aircraft. If you have any issues, questions, concerns or
problems during assembly, please contact our tech department at:
Info@3DHobbyShop.com
or 1-830-990-6978 10am-5pm Central M-F
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.
IMPORTANT NOTE – We strive to provide the absolute best-quality ARF aircraft on the planet. However, the ultimate
success or failure of this aircraft is dependent upon proper assembly by you. If you have questions about an assembly
step, please contact us, or read the assembly thread for your airplane on RCGroups.com before proceeding. It is always
better to slow down and be sure of your assembly than to rush through it and make a mistake which can cause a crash.
SAFETY in Flying
SAFETY NOTICE: This is NOT a toy! It is a very high-performance RC airplane capable of high speeds and 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 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 the 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

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Summary of Contents for 3D Hobby Shop 330SC

  • Page 1 Assembly Manual- 72” Extra 330SC Designed by Scott Stoops Thank you for purchasing this 3DHobbyShop ARF RC aircraft. If you have any issues, questions, concerns or problems during assembly, please contact our tech department at: Info@3DHobbyShop.com or 1-830-990-6978 10am-5pm Central M-F SAFETY in Assembly During assembly of this aircraft, you will be asked to use sharp knives and hobby adhesives.
  • Page 2 REQUIRED ITEMS CA Glue – Thin and Medium or Thick Hobby Knife Small Phillips Screwdriver Set Metric Allen Wrenches Scissors Small Pliers Adjustable wrench Masking tape Drill and drill bits Threadlocker (Blue Loctite) Polyurethane or 30min epoxy glue Vaseline/petroleum jelly Rubbing alcohol Optional –...
  • Page 3 Install the wheels onto the axles and secure with the wheel collars, as shown. (1.5mm Metric Allen Wrench/Driver) Slide one wheel/axle assembly into a wheel pant as shown above. Be sure to orient the wheel pants to face forward when landing gear is installed on the fuselage. Tighten the locknut as shown to secure the assembly onto the gear leg.
  • Page 4 Install wood screws through gear into pants as shown. (Tip: Drilling a 1/16” pilot hole will ease screw installation) Attach the gear to the fuselage with 4mm screws, use loctite. (3mm Metric Allen Wrench/Driver) Install gear cover plate as shown, using thick CA, epoxy glue or clear silicone.

  • Page 5: Tail Wheel

    Tail Wheel Builders Tip: Remove tail wheel assembly set screws one at a time and re-torque with loctite. This will assist in providing a long service life from your tail wheel assembly 1.5mm Metric Allen Wrench/Driver 2.3” Install tailwheel onto fuselage as shown, using QTY 2 screws and washers, with loctite. Note: Rear blind nut hole is located 2.3”...
  • Page 6 Note: Hinges are factory glued to the Rudder and Elevator halves. 1) Apply Petroleum Jelly to center hinge joint using cotton swab. 2) Lightly dampen all holes with water. (More important in dry climates)
  • Page 7 3) Squeeze in a small amount PU glue into all hinge holes. 4) Install rudder. BE SURE to position tail-wheel tiller wire as shown. 5) Wipe away glue as it expands and foams using rubbing or denatured alcohol. (Keep an eye on it and wipe as required for the first 10-20 mins)
  • Page 8 Covering Removal FWD Anti-Rotation Wing Bolt Aileron Servo Extension Wing Tube AFT Anti-Rotation Remove covering from areas indicated above. Recommended covering removal tools: 1) Hobby Knife 2) Soldering Iron (Pencil Tip) 3) Hot Knife...

  • Page 9: Horizontal Stabilizer Installation

    Horizontal Stabilizer Installation Remove covering over the horizontal stabilizer opening. Insert horizontal stabilizer – DO NOT GLUE YET. Temporarily install the wings onto the fuselage. Builders Tip: Use foam material to hold the horizontal stabilizer in place while aligning. Use a ruler to center and align the stab side-to-side.
  • Page 10 Using a tape measure or long ruler, measure from the stab to the wing tips as shown in the diagram. Equalize that measurement right and left to be sure your stab is aligned. Double check the side-to-site alignment before proceeding. When stabilizer is centered and aligned, drip Thin CA glue onto the stab-to-fuselage joint top and bottom.

  • Page 11: Elevator Installation

    Elevator Installation Install joiner into left elevator half using Medium CA. Press firmly into place to assure proper alignment. Allow to dry. Apply glue to left side elevator hinge holes using same method as rudder installation.
  • Page 12 Slide elevator into position as seen above. Insert hinges and temporarily hold elevator in place using a small piece if masking tape.
  • Page 13 Apply Medium CA to right elevator joiner slot. (Test fit before applying glue) Apply glue and position right elevator in place.
  • Page 14 Make sure the elevator can swing 45 degrees up and down, minimum. Apply masking tape strips to both elevator counterbalances, allow to dry.

  • Page 15: Rudder And Elevator Control Horn Installation

    Rudder and Elevator Control Horn Installation Rudder Control Horns for Electric/Pull-Pull set-up. (Short Mounting Tabs) Rudder Control Horn for Gas/DLE30 Push-Pull. (Long Mounting Tabs) Elevator Control Horn Temporarily assemble rudder and elevator control horns for your chosen power system as pictured above without lock nuts.
  • Page 16 Remove covering from just inside of marker perimeter. Repeat above steps on LEFT elevator.

  • Page 17: Elevator And Rudder Servo Installation

    Using plenty of epoxy or polyurethane glue, install the rudder and elevator horns as shown. (or on both sides of the rudder) Use the ball-joint as shown, to hold the rudder horn in perfect alignment while the glue dries. Clean up any excess glue with alcohol.
  • Page 18 Install rudder and elevator servos as shown. Note: Use 18-24” servo extension. A NOTE about servo arms on the 72” SC. The Extra 330SC uses ball-links on its controls for precise control- surface motion. It is extremely important to make sure that the ball-links have free motion throughout the servo travel, and do not touch the servo arms.
  • Page 19 Install elevator and rudder pushrods using hardware pictured above. NOTE: We recommend the use of one elevator servo with metal gears and at least 100 oz/in of torque. However, enough hardware is supplied in your kit to install a second elevator servo, in “mirror image” fashion, on the other side of the fuselage.
  • Page 20 The rudder pull-pull cables are assembled as shown in the diagram. Crimp the crimp tubes firmly with pliers, and use a drop of thin CA glue on each crimp tube after you are done crimping. Crimp the servo end of the cables first. The cables cross once inside the fuselage to form an “X”. Use a lock nut to tighten the ball link into the rudder control horn.

  • Page 21: Aileron Servo Installation

    Aileron Servo Installation Remove the covering over the aileron servo openings and install the aileron control horns using the same installation techniques from elevator and rudder. Attach the factory installed servo lead guide, gently pull extension through internal wing structure. (6-12”...
  • Page 22 Builders Tip: Apply a small piece of masking tape to temporarily secure aileron while installing pushrod hardware. Install both aileron pushrods using hardware pictured above.

  • Page 23: Sfg Installation

    SFG Installation (Side Force Generator) Locate items pictured above. Use the SFG spacers to help locate blind nut mounting holes in the wing tip and SFG’s. Install SFG’s as pictured.

  • Page 24: Cowl Installation

    Cowl Installation Place a small piece of masking tape on all four cowl mounting tabs, mark the centers. Install cowling and drill 4x holes for mounting screws.
  • Page 25 9/64 Drill Gas engine users are required to install the four 4-40 blind nuts provided in your kit. NOTE FOR ELECTRIC POWER SYSTEMS For those using electric power systems, the cowling can also be mounted using 4 of the supplied silver wood screws.
  • Page 26 Balancing: The Extra 330SC can use a wide range of center-of-gravity locations. The range is from 5.25” – 6.0” from the leading edge of the wing measured at the root where the wing meets the fuselage. The forward edge of this range will be more nose-heavy for sport and precision flight, the rear edge of this range provides better 3D performance.

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