3D Hobby Shop EPP EXTRA 330SC Assembly Manual

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Summary of EPP EXTRA 330SC

  • Page 1

    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...

  • Page 2

    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 optiona...

  • Page 3

    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...

  • Page 4

    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

    5 install tailwheel onto fuselage as shown, using qty 2 screws and washers, with loctite. Note: rear blind nut hole is located 2.3” from aft vertical stabilizer. (3/32 allen wrench/driver) \ the 72” sc comes with pre-hinged and pre-gap-sealed wings/ailerons to save time during your build. The airpla...

  • Page 6

    6 1) apply petroleum jelly to center hinge joint using cotton swab. 2) lightly dampen all holes with water. (more important in dry climates) note: hinges are factory glued to the rudder and elevator halves..

  • Page 7

    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

    8 remove covering from areas indicated above. Recommended covering removal tools: 1) hobby knife 2) soldering iron (pencil tip) 3) hot knife covering removal fwd anti-rotation pin aft anti-rotation pin wing tube wing bolt aileron servo extension.

  • Page 9

    9 remove covering over the horizontal stabilizer opening. Insert horizontal stabilizer – do not glue yet. Temporarily install the wings onto the fuselage. Use a ruler to center and align the stab side-to-side. Horizontal stabilizer installation builders tip: use foam material to hold the horizontal ...

  • Page 10

    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 ...

  • Page 11: Elevator Installation

    11 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. Elevator installation.

  • Page 12

    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

    13 apply medium ca to right elevator joiner slot. (test fit before applying glue) apply glue and position right elevator in place..

  • Page 14

    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

    15 temporarily assemble rudder and elevator control horns for your chosen power system as pictured above without lock nuts. To help obtain proper cg: electric power systems use pull-pull rudder set-up. Dle30/gas engines use tail mounted push-pull rudder set-up. Proceed to next page: rudder control h...

  • Page 16

    16 remove covering from just inside of marker perimeter. Repeat above steps on left elevator..

  • Page 17

    17 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. Allow to dry. Instructions for pull-p...

  • Page 18

    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 ser...

  • Page 19

    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...

  • Page 20

    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...

  • Page 21

    21 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” servo extensions depending on rec...

  • Page 22

    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: (Side Force Generator)

    23 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. Sfg installation (side force generator).

  • Page 24

    24 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. Cowl installation.

  • Page 25

    25 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. Install cowling using (4x) 4-40 mounting screws and washers. ...

  • Page 26

    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 ...