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Carl Goldberg Products Electra Instructions Manual

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INSTRUCTIONS
Welcome to the carefree radio control experience that is Electra. With the flip of a switch you're flying! No fuel
or messy exhaust oil to clean. No adjustments to make on an engine. Electra performs like a thoroughbred
but has a stable pony temperament. She is based on the proven and popular Gentle Lady sport sailplane, but
has been modified for the higher performance demands of electric flight. Building is easy, but carefully FOL-
LOW THESE STEP-BY-STEP INSTRUCTIONS to prevent simple mistakes. Many a modeler has built two
right wings because he failed to follow the instructions. You'll also find many installation and flying tips includ-
ed. We think you will find electric flying to be a quiet, yet exciting change of pace−maybe even "Electra-fying!"
WARNING!
THIS IS NOT A TOY! A radio-controlled model is not a toy and is not intended for persons under 16 years old.
Keep this kit out of the reach of younger children, as it contains parts that could be dangerous. A radio-con-
trolled model is capable of causing serious bodily injury and property damage. It is the buyer's responsibility to
build this kit correctly and to properly install the motor, radio, and all other equipment. Test and fly the finished
model only in the presence and with the assistance of another experienced R/C flyer. The model must always
be operated and flown using great care and common sense, as well as in accordance with the safety standards
of the Academy of Model Aeronautics (5151 Memorial Drive, Muncie, IN 47302, 1-800-435-9262). We suggest
you join the AMA and become properly insured prior to flying this model. Also, consult with the AMA or your
local hobby dealer to find an experienced instructor in your area.
Per the Federal Communications
Commission, you are required to use only those radio frequencies specified "for Model Aircraft."
© copyright 1986
Pt. # 2083 4/00

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  • Page 1 INSTRUCTIONS Welcome to the carefree radio control experience that is Electra. With the flip of a switch you’re flying! No fuel or messy exhaust oil to clean. No adjustments to make on an engine. Electra performs like a thoroughbred but has a stable pony temperament. She is based on the proven and popular Gentle Lady sport sailplane, but has been modified for the higher performance demands of electric flight.
  • Page 2 PUSHROD CONNECTOR LIMITED WARRANTY Carl Goldberg Products, Ltd. takes pride in the care and attention given to the manufacture of its model airplane kits. The company warrants replacement of any materials found to be defective for their intended use, prior to their use in construction of the aircraft, provided the buyer requests such replacement within a period of one year from the date of purchase and provided the defective part is returned, if so requested by the company.

  • Page 3: Identifying Parts

    Building options, as well as balancing, set- up, and flying the model are covered. IDENTIFYING PARTS Like a full-size airplane, the ELECTRA is built from basic Parts for the wing are bundled together; likewise, parts structures (stabilizer, fin, wing, etc.), which are then assem- for the tail assembly are also grouped.
  • Page 4 Although the ELECTRA is designed to fly on 2 or 3- fumes away. A fan is recommended. Also, special care must...

  • Page 5: Battery Chargers

    The Carl Goldberg Models TURBO 550 Motor is includ- ELECTRA CONSTRUCTION OPTIONS ed in your ELECTRA kit because it has excellent perform- ance and will provide you with a good climb for four minutes NOTE: Materials for these options are not included or more, using a standard 6-cell battery and 8-4 prop.

  • Page 6: Basic Structure

    WOOD PARTS ABOUT THE WOOD IN THE KIT Be careful when removing parts (such as fuselage We strive to supply good quality materials in your kit. sides) from the die-cut sheets. Long parts are fragile Wood parts are inspected with regard to the function until Super Jeted into a structural unit.
  • Page 7 DIE-CUT WOOD SHEETS SHEET 4001 WING RIBS 5/64 x 2-7/8” 2 REQ’D. SHEET 4002 WING RIBS 5/64 x 2-7/8” 2 REQ’D. SHEET 4003B FUSELAGE REAR SHEET 4003A FUSELAGE FRONT FUSE REAR DOUBLER STAB TIPS WING/TAIL GUSSETS STAB CENTER PLATFORM DORSAL STAB L.E.
  • Page 8 GLOSSARY OF MODELING TERMS RETRACTS: devices for extending and retracting the ARF: Almost Ready to Fly wheels on command AILERON: the control surface on the wing that rolls the ROLL: tilting of the plane as viewed from the front, con- plane AIRFOIL: the shape of the wing as seen from the end trolled by the ailerons...

  • Page 9: Tail Construction

    TAIL CONSTRUCTION STAB TIPS WING & TAIL GUSSETS STAB CENTER DORSAL PLATFORM STAB L.E. JOINER FIN BOTTOM Still working over the plan, and using the tech- nique shown above, cut 5/64 x 3/16” balsa Collect the following items. sticks to form stab trussing. Trim carefully to (4) 3/16 x 3/8 x21”...
  • Page 10 After gluing the fin and rudder pieces, allow to dry before continuing. Carefully separate the stab from the elevator and the fin from the rudder. Gently sand to remove any rough spots from tack-cementing. TILT CENTERLINE Referring to the plan, mark the hinge locations MARKER SO PEGS on the fin T.E.
  • Page 11 Next, cut 45º slots on each side of each hole to accommodate the hinge webs. NOTE: The CGM hinge slotting kit (Item # 600) is handy Tape the T.E. of the elevator to the work surface. for this process. Using the beveling tool, sand the L.E. to the centerline.

  • Page 12: Wing Construction

    WING CONSTRUCTION IMPORTANT: YOU WILL BE BUILDING A RIGHT AND THEN A LEFT WING. FOLLOW THE STEPS CAREFULLY TO AVOID CONFUSION. D/C SHT. 4001 D/C SHT. 4002 D/C SHT. 4010 D/C SHT. 4006 D/C SHT. 4012 D/C SHT. 4009 D/C SHT. 4008 D/C SHT.
  • Page 13 REAR SPAR JOINER HAS TAPERED ENDS. Align the notches in the wing trailing edge (T.E) with those shown on the plan. Using no glue, position the four #5 ribs as shown above. Hook each rib over the main spar and then over the rear spar, as you go. DO NOT GLUE THESE RIBS...
  • Page 14 Remove the sheet from the wing and, using a metal straight edge, carefully trim the sheeting so that, when the piece is laid flat, it just fits between the L.E. and the spar. Following the same procedure, trim and fit two more sheeting pieces for the bottom center section.
  • Page 15 REMOVABLE TIP OPTION fully groove the spars for the wire and for the brass tube. NOTE: The materials needed to make the wing tip Tack-glue the WIRE to the OUTBOARD SPAR removable are NOT INCLUDED in your kit. and the BRASS TUBE to the INBROARD Necessary templates for this option are found in SPAR.
  • Page 16 With the outboard panel still pinned down, raise Set the outboard L.E. sheeting in place, aligning the inboard panel and support it with the wing the inboard edge of the sheet with the joint dihedral gauges under the first rib #5 location, as between rib #6 and the #6a doubler.
  • Page 17 Raise up the right inboard panel, supporting it with the dihedral gauges at the outermost rib Trim off excess spar material extending beyond #5 position. the #15 ribs (wing tip ribs) IMPORTANT! The ends stamped “B” must be up. Glue trip strip to the #15 ribs, as shown. Carve and sand balsa tri-strips, so that they match the top contour of the wing tip ribs.
  • Page 18 When the L.E. sheeting is dry, install the die- When the glue has dried, remove all clamps cut, tapered center sheeting. from the spars. From plain 1/16 x3 x 12” balsa, cut and fit the Cut three 3-1/4” pieces of bottom sheeting from remaining rear sheeting piece.
  • Page 19 Cut a piece of 3/4” wide nylon long enough to wrap completely around the wing with a small overlap. Apply a spot of Super Jet™ on the wing bottom at the center joint. Immediately stick one end of the nylon strip to the wing and let dry until it is firmly glued to the balsa.
  • Page 20 FUSELAGE CONTRUCTION D/C SHT. 4007 D/C SHT. 4003 D/C SHT. 4008 D/C SHT. 4004 D/C SHT. 4011 D/C SHT. 4005 D/C SHT. 4013 D/C SHT. 4006 Collect the following parts: MATCH TONGUE (2) D/C SHT. 4003 Fuse Side PT. #3603 CORNERS (2) D/C SHT.
  • Page 21 When dry, gently slide the hatch away from the fuse bottom sheet. Lay out the fuselage, as shown, so that there is a left and a right side. Temporarily position the front and rear dou- blers on each fuse side to check for fit. ALIGN HOLES Position 1/8”...
  • Page 22 Spread the fuse front apart and, with the dou- bler strips facing toward the front of the model, plug Former “B” into the holes in the fuse sides. STAB PLATFORM Now, with the doubler strips facing thr rear of the plane, insert Former “C”. POSITION SLOT ON LEFT SIDE NOTE: The v-cut tops of the formers face in toward...
  • Page 23 Place the battery hatch in the fuse bottom and position a nylon flat hold-down at the centerline Turn the fuse over and position the 1/16” ply of the fuse. The open-hole half of the fastener front bottom sheet on the fuse sides, behind should rest on the battery hatch and the close- Former “A.”...
  • Page 24 As was done with the threaded wires, bend down one end of each 4” wire. Again, make a recess in the wood and drill a hole at the end of the recess to accept the hooked end of the wire. Attach each wire to the other end of each balsa pushrod and secure, as before.

  • Page 25: Covering The Model

    COVERING COVERING THE MODEL INTRODUCTION There are several ways to cover the frame of a model airplane. Years ago, the open framework of most air- planes was covered with a combination of tissue (or silk) and dope; the solid structures were painted. Today, most models are covered with polyester films that resemble either a painted finish or a fabric finish.
  • Page 26 tip will rise up about 1/4 from the flat surface. COVERING THE TAIL Cover all tail components (the stabilizer, the elevator, the fin, and the rudder), following the same procedure as with the wing. The component pieces should each Work from the center out and tack to the ribs, sheeting, be covered separately, before assembly.

  • Page 27: Applying Decals

    Finally, it’s a very good idea to permanently affix your name, address, phone number, AMA number and the word “REWARD” on your aircraft. Then, if your model should fly away for any reason, you’ll have a chance of getiing it back. Cover the hatch bottom, carefully sealing around the edges.
  • Page 28 LANDING WHEEL OPTION Taking care to avoid cutting the wood underneath, strip away the covering in the NOTE: The materials needed for the landing wheel area of the stab that contacts the fuse. Be cer- option are NOT INCLUDED in your kit. Refer to the tain to leave at least 1/8”...

  • Page 29: Motor Installation

    BATTERY HAZARD! excessive motor loads. During motor operation, if the The battery size used to power the Electra motor propeller should hit an object, the sudden surge of bat- stores a lot of electrical energy. Be careful to prevent tery current will blow the fuse and prevent motor/bat- shorting it out.
  • Page 30 NOTE: When handling the motor and switch harness, try to avoid bending the wires near the soldered con- nections. If handled carelessly, these joints can be bro- ken. The following instructions are for installing the Turbo 550 motor. If using another motor, you may need to modify the installation according to the motor manu- Insert the motor through from the rear of facturer’s instructions.
  • Page 31 DO NOT OVERTIGHTEN Place the propeller on top of the backplate so that it lines up with the pin, as shown above. Place a large washer on top of the prop and then install, using a #4 x 1/2” machine screw. CAUTION: DO NOT OVER-TIGHTEN, as this may cause the threads to strip out.

  • Page 32: Radio Installation

    RADIO INSTALLATION TYPICAL RADIO EQUIPMENT LOCATION CONTROL HORNS RUDDER SERVO ELEVATOR SERVO MOTOR SERVO MINI-SNAPS (CLEVISES) ELEVATOR PUSHROD RUDDER PUSHROD RADIO BATERY PACK RECEIVER (RX) ON/OF SWITCH. IMPORTANT! Installation of the Turbo 550 motor and same general procedures, determine the loca- a typical radio system is described in this booklet.

  • Page 33: Elevator And Rudder Servo Installation

    ELEVATOR AND RUDDER SERVO INSTALLATION MOTOR SERVO INSTALLATION (3-CHANNEL) Referring to the plan for proper location, insert the motor servo onto the fuse side with servo INVERTED FUSE mounting tape. Remove the servo wheel and install the CGM pushrod connector, as shown. This device lets you easily adjust the motor pushrod movement.

  • Page 34: Battery Pack Installation

    Since the Electra is frequently hand-launched, we prefer to install the switch Apply tape (which can be written upon) to each...

  • Page 35: Balancing The Model

    BALANCING THE MODEL SETTING CONTROL SURFACES All pushrods must move freely, without binding. Adjust IMPORTANT: NEVER NEGLECT THIS STEP WITH them, if necessary, for smooth operation. When set- ANY AIRPLANE. If you try to fly a plane with the bal- ting the travel (movement of rudder or elevator), make ance point outside of the recommended range, you run certain that no servo is hooked to a pushrod in a man-...
  • Page 36 AL ESSENTIAL TO YOUR SAFETY AND THE MAX- When you over-charge a battery, the temperature rises IMUM PERFORMANCE OF YOUR ELECTRA! quickly and there is potential for EXPLOSION, or at Please take the time to read this section very careful- least battery damage (Figure B).

  • Page 37: Battery Equalization

    “TREAT YOUR RADIO RIGHT AND IT WILL DO THE SAME FOR YOU!” by Hal deBolt Today's RC systems are very well engineered and constructed. However, they will remain only as good as the way in which they are USED. Always follow the rules of proper usage and all manufacturer's instruc- tions for your particular piece of equipment.
  • Page 38 FLYING THE ELECTRA Finally, make sure that everything on your aircraft is LEARNING TO FLY neatly and firmly in place-motor fastened down, servos snugged down, receiver and battery wrapped in foam Flying R/C is both fun and challenging. As with other rubber, etc.

  • Page 39: Hand Launching

    Electra will gain several hundred feet of altitude and will allow you time to get oriented and familiar with The Electra must be hand launched. This is easy to do, the control "feel." When the battery power begins to...
  • Page 40 Take things slow and easy and you’ll be able to enjoy you have it pointed directly into the wind. Be patient flying your Electra for years to come. and keep your glide steady and gentle, with the wings level. 7. A controlled landing into the wind is your...

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