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Related Manuals for Hobbico Extra 300S
Summary of Contents for Hobbico Extra 300S
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Page 1: Assembly Instructions
™ ASSEMBLY INSTRUCTIONS Entire Contents © Copyright, 1996 HCAZ3078 V 1.0... -
Page 2: Tail Assembly
Part # Quantity created for you and other experienced radio control Stabilizer and elevator....1 modelers, Hobbico’s Extra 300S offers nearly all the 16 Rudder and fin ......1 excitement of piloting a real airplane...and develops skills 28 *Clevises ........5 29 *Control horns .......2 that will take you anywhere you want in your hobby. - Page 3 Nylon Hardware Fuel Tank & Parts Engine Mounting Parts Part # Quantity Part # Quantity 19 Fuel tank ..........1 11 Engine mount ........2 20 Rubber tank stopper ......1 32 4 x 18mm bolts ........4 21 Fuel pick-up weight (clunk) ....1 33 4mm washers ........4 22 Plastic stopper compression disks 34 4 x 25mm bolts ........4...
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Page 4: Radio Equipment
Getting Ready for Flight Your Hobbico Extra 300S is ready for takeoff in as little as 20 hours. Your hobby dealer or flying instructor (see next page) can help you decide what accessories you’ll need for flight. Most are one-time only purchases—and your instructor will probably allow you to use his field box until you can outfit your own with a glow plug starter, fuel pump and “chicken stick"... -
Page 5: Before You Fly
If you, as the original owner of this model, discover defects in parts or as possible. workmanship within 90 days of purchase, Hobbico will repair or replace it – at 1. ALWAYS return your entire system, including airplane and radio. -
Page 6: Wing Assembly
Clean up any excess epoxy that may remain using a paper towel and 70% Isopropyl Alcohol. Use The wing panels in the Extra 300S are joined books or some other form of weight to hold the wing upside down. The top of the wing must be flat on your... - Page 7 Prepare the Servo Box Plates: Reinforcing the Wing Center Section: Locate the 2-3/8" x 1-3/8" x 1/16" plywood front Lightly sand the center section of the wing to plate and the 2-3/8" x 1-1/4" x 1/16" plywood rear remove any excess epoxy and smooth the center plate.
- Page 8 Install Wing Alignment Dowels: Fuse Assembly Install Servo Tray Doublers: Using a 17/64" drill bit, drill two holes into the front of the wing using the wing front former as a guide. Drill Using Medium CA, glue two mixing sticks to the these holes 1-3/4"...
- Page 9 Laminate the Wing Bolt Mounts: may be required to achieve a snug fit of the mount. Once a good fit has been achieved, glue it into position using 30-minute epoxy. Install the Tail Mounting Block: Apply 30-minute epoxy to one side of each the #1 and #3 wing bolt mounts.
- Page 10 to the opposite tip. Continue this process until the arrow lines up with each tip. Make a mark from the wing to the fuselage to indicate the proper alignment. Prepare the Wing Bolt Plate: Test fit the wing into position. The wing may need slight sanding to fit around the fuselage.
- Page 11 wing. Trim away any covering that may be beneath the Install the Wing Bolts: wing bolt plate so that is resting on either wood or fiberglass. Using 30-minute epoxy, glue the wing bolt plate into position on the wing. Use clothespins or masking tape to hold the plate in position until the epoxy has cured.
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Page 12: Stabilizer And Vertical Fin Installation
Trimming the Wing Fairing: Install the Wing Fairing: Use a hobby knife or polycarbonate scissors to trim Glue the wing fairing into position using Medium CA. out the wing fairing. Trim only the sides at this time. Stabilizer and Vertical Fin Installation Fitting the Wing Fairing: Center the Stabilizer: Align the rear scribe line to the trailing edge of the... - Page 13 Horizontal Stabilizer Alignment: Trim the Aft Fuselage Cover: With the wing bolted on, slide the stabilizer into position, centering it using the marks made in the previous step. Check to make sure that the stabilizer is parallel to the wing. If not, sand the stabilizer opening in the fuselage.
- Page 14 Prepare the Tail Gear: Mounting Control Surfaces Locate the Elevator Hinges: Pass the pre-bent tail gear wire through the tail gear bushing. Measure 3/4" from the end of the wire and make a 90° bend in the wire so that it passes back over Measure and mark the positions for the elevator the lower portion of the tail gear wire.
- Page 15 Prepare the Stabilizer for Hinges: Prepare the Rudder: Using the same method as for the elevators, drill and slot the rudder for hinges. Do not slot the bottom hole. Using a hobby knife, cut a groove from the bottom hole that extends to the bottom of the rudder.
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Page 16: Mounting The Engine
Note: If you intend on performing high “G” maneuvers with your Extra 300S, it is suggested that you create a Position the engine between the engine mounts. fillet of 30-minute epoxy behind the firewall to help Slide the mounts together to fit against the engine. - Page 17 Marking the Engine Mount: will be on the top of the engine mounting flange and the lock washers on the bottom of the engine mount. Temporarily tighten the bolts at this time. Install the Engine: After checking the distance of the drive washer from the firewall, and that the engine is perpendicular to the firewall, mark the positions for the engine bolts using a 1/16"...
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Page 18: Assemble And Install The Fuel Tank
Install the Muffler (Two-Stroke): Bend the Vent Tube: Bend the longer tube (pressure tube) up as shown so that it will come within 1/16" of touching the top of the tank when installed. Use your fingers to bend the tube, being careful not to kink it closed. -
Page 19: Install The Landing Gear
making sure the stopper is fully seated and the clunk Attach the Fuel Tubing: moves freely, tighten the screw to secure the stopper into position. Do not overtighten the screw, as this may strip the threads or possibly damage the tank or stopper. Install the Foam Tank Collar: Locate the foam tank collar and slide it into position. - Page 20 in front of the wing saddle. Trim the covering using a Joining the Wheel Pant Halves: hobby knife to expose the blind nuts. Attach the Landing Gear: Using Medium CA, glue the two wheel pant halves together. Do not use any accelerator on the wheel pants, as it will damage the plastic.
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Page 21: Installing The Wheels
5/32" drill bit. Glue the supplied plywood disc slightly Installing the Wheels above the hole using Medium CA. Make sure to make both a right and left wheel pant. Install the Tail Wheel: Installing the Axle: Install the axle, bushing, M3 washer and M3 nut as shown in the photo. - Page 22 should be enough of the axle exposed on the outside of in earlier. Harden the plywood using a drop of Thin CA. the pant to continue tightening. Do not tighten the nut Install an M3 x 10 sheet metal screw. Tighten the M3 too much, as the wheel will need to rotate freely on nut, making sure the wheels rotate freely.
- Page 23 Locating the Engine position: Trimming the Cowl: Use a thin piece of cardboard to make a template for Using the mark just made, trim the cowl to fit around the cutout in the cowl for the engine. Cut the opening to the head of the engine.
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Page 24: Install The Radio
Attach the Cowl to the Fuselage: Install the Aileron Torque Rod Connector: Use a card stock template to locate the front Locate the aileron torque rod connector on the bulkhead on the fuselage. Position the cowl with the parts tree. The correct connectors have a larger hole for spinner and propeller installed on the engine. - Page 25 intersects the aileron servo horn with the aileron Install the Radio Components: aligned to neutral. Bend the linkage 90° at this point using pliers. Connect the linkage to the servo: After installing the rubber grommets and bushings according to the radio manufacturer’s instructions, position the servos in the servo tray as shown.
- Page 26 Prepare the Elevator Pushrods: Prepare the Elevator Clevises: After sliding a 1/4" piece of fuel tubing onto a clevis, Collect two each: clevises, 1-5/8" threaded studs thread the clevis onto the center screw 14 turns. and 1/4" pieces of fuel tubing. Slide the 1/4" pieces of Completely thread the white inner pushrods onto the fuel tubing onto the clevises.
- Page 27 Marking the Position of the Control Horns: the elevator, finally screwing them into the control horn backplate. Harden the underlying control surface by gently puncturing the covering using a T-pin. Use Thin CA to harden the balsa underneath the covering. Tighten the screws, being careful not to damage the underlying balsa.
- Page 28 Install the Inner Pushrod: Tighten the screws, being careful not to damage the underlying balsa. Cut off the excess threads using a wire cutter or a Dremel MultiPro with a cut-off wheel. Adjust the clevis, threading it in or out, to neutralize the rudder with the servo in neutral.
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Page 29: Install The Canopy
Brothers 1/6 Scale Pilot (WBRQ2484) would be a great Move the throttle stick and trim lever on the transmitter addition to add realism to your Extra 300S. Glue the into the center, or neutral position. Turn on the transmitter canopy in place using Z-R/C-56 adhesive. After the glue and receiver. -
Page 30: Balance Your Model
Note: An airplane 1. Wrap the receiver and battery in 1/2" foam rubber that has been laterally balanced will track better in loops (Hobbico HCAQ1050) securing the foam with and other maneuvers. rubber bands. -
Page 31: Control Surface Throws
Control Surface Throws We recommend the following control surface throws: Note: Throws are measured at the widest part of the elevators, rudder, and ailerons. ELEVATOR: (High Rate) (Low Rate) 5/16" (8mm) up 1/4" (6mm) up and down and down We use a Top Flite Precision Magnetic Prop Balancer (TOPQ5700) in the workshop and keep a Great Planes RUDDER: right as much... -
Page 32: Ama Safety Code (Excerpt)
Repeat this test with the engine running at various AMA Safety Code (Excerpt) speeds with an assistant holding the model. If the control surfaces are not always acting correctly, do not fly! Find and correct the problem first. Read and abide by the following Academy of Model Aeronautics Official Safety Code: Engine safety precautions General... -
Page 33: Glossary Of Terms
are quite docile and forgiving. It does not, however, fit of Z-bend in servo arm; insufficient glue used when have the self-recovery characteristics of a primary R/C gluing in the elevator joiner wire or aileron torque rod; trainer; therefore, you must either have mastered the excessive flexing of aileron, caused by using too soft basics of R/C flying or obtained the assistance of a balsa aileron;... - Page 34 Clunk – A weighted fuel pick up used in a fuel tank to Flaps – Hinged control surface located at the trailing assure the intake line is always in fuel. edge of the wing inboard of the ailerons. The flaps are lowered to produce more aerodynamic lift from the Clevis –...
- Page 35 for starting. The battery is removed once the engine is Typically connected to the rudder servo for steering running steadily. while on the ground. High Wing – An airplane with the wing mounted on top Pattern Airplane – A model airplane designed to of the fuselage.
- Page 36 Spinner – The nose cone which covers the hub of V-Tail – An airplane which has two tail surfaces in the the propeller. shape of a V, in lieu of a vertical stabilizer and horizontal stabilizer. The control surfaces on a V-tail Sport Airplane –...