GoldWing RC 88in EXTRA300LP 50CC Instruction Manual
Dear Customer, Thanks for purchasing this newly designed 88in EXTRA300 50CC aerobatic RC airplane. The weight is approximately 17Lbs. It’s good for IMAC and free style flying. It’s a beautiful plane with amazing flight performance. It’s covered with genuine monocote, and comes with good quality accessories, including carbon fiber wing tube, Anodized 6061 aluminum landing gear or carbon fiber as an option. We hope you enjoy this plane.
RADIO:6+CH/5-6S FEATURES INCLUDED Newly designed structure Two pieces removable wings & stabs Larger aileron and elevator design for excellent 3D aerobatic flying Full length Tuned pipe tunnel designed into fuselage Servo extension safety connector clips High performance cap head bolts Flat nylon hinges for increased strength High quality 3mm ball links assembly Carbon fiber wing tube Carbon fiber stab tube Removable rudder Includes Side Force Generator’s(SFG) CNC anodized aluminum Canopy Bolts
Adjustable pushrods for easy fine tuning(Includes wrench) New dual fiberglass horn assembly
Carbon fiber tail wheel assembly High-quality durable rubber wheels Stainless steel Axles Anodized 6061 Aluminum landing gear The EXTRA is designed to directly accommodate KUZA® rudder servo tray.
Items Required to Complete This Model: 50-70CC Gas engine and exhaust Appropriate propeller for your Motor All required engine and exhaust mounting hardware Ignition battery and switch One quality throttle servo and appropriate servo arm 4Pcs high quality metal gear servos or better for the ailerons and elevators Appropriate servo arms for the above Servo wire extensions.
2. Be sure to seal any exposed wood with a thin coating of epoxy to prevent engine oil from soaking in. This is especially important around the engine compartment and servo openings with exposed areas. 3. Some modelers prefer to seal the hinge gaps using strips of appropriate covering or clear trim tape. We have found this to be helpful with models intended for higher speed flight or models with unusually large hinge gaps.
Pushrods(Bag No. KA05CBG2) Four 3x61mm pushrods for ailerons. One 3x125mm pushrods rudder （Pull-push style） Pull-pull assembly kits for the rudder. (Bag No.
Ball link assemblies (Bag No. KAG00131): 8 for ailerons and elevators. Alu long arm kits (Bag No. KA05CC): 4 single arms for ailerons and elevators. 6 Servo extension safety connector clips (Bag No. KAG0021) Main rubber wheels (Bag No. KAG014B)：2PCS 1 dual arm for the rudder.
New stainless steel Axle kits (Bag No. KA05CH): 2PCS New Carbon fiber tail wheel assembly. (Bag No. KAG0104) 4mm ALU canopy bolts & 12mm PTFE washers (Bag No.
Bolts & washers for cowl: 4(3x16mm) Hexagon bolts and 2(10mm) PTFE washers and 2 wsahers 4 allen keys(Bag No.
Wing Assembly 1.Aileron push rod linkage set. 3x61mm Pushrods for aileron. 2.It is much easier to install the twin control horns before installing the wing. Locate the fiberglass aileron control horns, ball links, and associated bolts and nylon-insert lock nuts. Use some fine sandpaper to roughen up the center areas of the two control horns so that the glue adheres better. Using a sharp hobby knife cut the covering away from the slots in the rudder and trial fit the two control horns. 3.
4. The slots for the supplied hinges are pre cut. Locate the hinges and dry fit the hinges and aileron into place and test the operation. The hinges should seat fully into the slots so that the hinge line gap is minimal while still allowing full aileron deflection. 5. Before gluing the hinges in you must first clean the hinges of any mold release agent using isopropyl alcohol. We also recommend scuffing up the plastic with light sandpaper for maximum glue adhesion. 6.
12. We recommend using KUZA 1.5” aluminium CNC servo arm (sold separately) for wing control. Elevator Assembly 1. Push rod linkage set for elevator. 3x61mm Pushrods for elevator. 2. Find the slots for the control arms in the elevators and remove the covering where the horns are inserted and the area for the plate.
3. Sand the area on the horn that will be glued inside the elevator. 4. Using plenty of 30 minute epoxy fit the horn and plate into place. the horn in place while drying. Use a ball joint and bolt to hold REPEAT FOR THE OTHER SIDE 5. Place long arms onto the servo’s you are planning to use for the elevators.
6. Place the servo into the elevator and screw in place. Remember to harden the holes with thin Cyano. 7. Place the servo arm back onto the servo, remembering to centre. Use nutlock on the servo arm screw. 8. Fit the pushrod in place remembering one end is reverse threaded. Set it so the arm is centered and the elevator is flat. Choose the holes depending on how much deflection you require.
9. We recommend using KUZA 1.75” aluminium CNC servo arm (sold separately) for elevator control. Rudder Assembly 1． Install the fiberglass control horns in the same way as you did the elevator horns.
2．The EXTRA is supplied with a high quality set of pull-pull cables and ball-links. 3．Locate the pull-pull cable set, threaded couplers, brass swaging tubes, and ball-links. If the cable is one long piece, cut it into two equal length pieces. Thread one end of the one cable through a brass tube and then through one of the threaded couplers. Run the cable back through the brass tube and then loop it back through a second time.
7. We recommend using KUZA 4” aluminium CNC servo arm (sold separately) for rudder control. 8．We recommend using KUZA® rudder servo tray (available separately) for better rudder performance.
9．This EXTRA is designed to directly accommodate KUZA® rudder servo tray, and so will be all other pending ARF airplanes that are 50cc or greater. 10．You will need to provide 3X42 mm push rods (2 Pcs) and ball links (4 Pcs), depending on the servo of your choice, a KUZA 3.25” aluminum CNC servo arm may also be needed. 11. Assembling rudder servo tray.
12． The EXTRA also provides pull-push style for rudder. Below is picture of pull-push style linkage set.
Cut off excess fiberglass rudder horn, and use sandpaper to roughen up the parts needed to inlay. Use epoxy glue to glue the rudder horn. Use 3X125mm push rod to connect to the horn.
Tail Wheel Installation 1. Begin the tail wheel assembly by installing the hollow hex bolt and lock nut into the large hole at the rear of the tail wheel bracket. 2．Slide 3 wheel collars and the wheel onto the pre-bent tail wheel wire and tighten in place with thread lock as shown below.
3．Install steering rod, again, the use of thread-lock on any metal to metal screw is advised. 4．There are 3 pre-installed blind nuts on the rear of the fuselage, locate the screw holes and puncture the covering. Then install the CF tail wheel bracket with M3 hex bolts and washers.
5．Drill a screw hole on the bottom of rudder, 200-220 mm away from the hinge line, with 2 mm drill bit. Secure one end of the wheel spring with a M3 12mm self-threaded screw, then hook the other end onto the steering rod. 6．Fully installed tail wheel assembly is shown below. Main Landing Gear Installation 1. Locate the supplied main landing gear parts and sort them out on your workbench.
2. Bolt the main gear to the bottom of the fuselage using the supplied bolts. Place the nuts in through the can tunnel opening with appropriate size spanner. Remember the gear will rake forward. 3. Loosen out the second nut, then apply 30 minute epoxy glue on the axle. Tighten the nut back in place, allow at least 1 hours for threadlocker to dry.
4. Install the main wheel axles to the composite landing gear and tighten the nylon-insert lock nut. Install one wheel collar onto the axle. Use a second wheel collar as a guide to leave a gap on the inboard of the axle. Use a small drop of thread-lock and tighten in place. Slide the wheel onto the axle and install a second wheel collar also using thread-lock on the set screw. 5. Fit the wheel pant in place and install using the two supplied bolts. place. Repeat the above steps for the other main gear.
2. Fit the Cowl and measure the distance from the engine bulkhead to the front of the cowl, add approx 2-3mm for the spinner back plate and this is the length that your engine should be set Using the correct length stand offs, mount your engine securely using bolts, 20mm POM washers, and locknuts. The use of thread-lock is also highly essential for the engine bolts. 3. Mount the ignition module according to the manufacturer’s instructions. The best place to mount it is on the side of the engine box.
5. Assemble the throttle servo mount using the supplied laser cut parts or there is a servo cutout in the bottom of the engine box for 50cc-70cc engines. Mount your throttle servo and complete your linkage setup. A hole will need to be drilled on the firewall to allow the pushrod to connect to the throttle arm on the carb. 6. An extra servo can be fitted for choke or a mechanical linkage can be used. 7. The new KUZA 500cc Fuel Tank with aluminum tank cap is preassembled.
A barb on the bottom of the fuselage can be fitted for the vent. 8. The EXTRA comes with canister pipe tunnel. Standard muffler, pitts muffler, canister or tuned pipe can be fitted. If a tuned pipe is going to be used the end of the can tunnel can be removed. The tunnel can be closed off to accept canisters of all sizes, or stock mufflers. Follow the manufacturer’s instructions for your exhaust system paying attention to vibration mounts if required and air flow requirements.
Canister Fitting Tuned Pipe Mounting
The EXTRA comes with many openings for the exhaust outlet, line up the exhaust then remove the covering for the required outlet. They come with covers that can be used for cooling. Use a soldering iron to open up the holes. Installation of KUZA Fuel Dot and Fuel Vent Line Plug （Not included） 1. From June 2015 and on, all Goldwing gas airplanes are made ready for KUZA fuel dot and vent line plug. Available in three colors: black, red and blue. 2.
Secure the housing of fuel dot with supplied 2.5 mm self-tapping screws, then plug and install the fuel line to complete the setup of fuel dot. 3. Installation of KUZA CNC Aluminum Fuel Vent Line Plug Similarly, two sites for vent line plug installation are available at the bottom of the fuselage. Secure KUZA vent line plug with four 2.5 mm self-tapping screws as shown below.
COWLING INSTALLATION 1. With the engine fitted, tape a piece of card to the bottom of the fuselage that can overlap the cylinder head. Remove the engine and refit the cowl. would be as below. Then fold over the card to show where the cylinder head 2. Mark onto the cowel the area to remove, and remove with a dremel.
As the EXTRA has a scale inlet, depending on your engine it may need to be removed. it may be beneficial to strengthen with a small amount of glass cloth. If it is still attached If your exhaust outlet comes out within the cowl area then use the same method. Depending on the amount of cooling required for your engine a template for louvers in the bottom of the cowl has been provided. Use a dremel tool to remove the material.
Labels are provided for aligning the drill holes for the cowl. Stick then on without the cowl, mark the hole. Fit the cowl then press back down. The hole will then show the area to drill. Sere below.
1. Whether you 72 MHz systems or the newer 2.4 GHz systems, proper radio installation and care is vital to the safe and reliable operation of your aircraft. Follow the manufacturer’s instruction for installation guidance of receivers and batteries paying attention to factors such as vibration isolation, adequate cooling, and clearances. 2. Mount your reciever(s) securely in a location which provides a clean and maintenance free solution to your setup.
FINAL ASSEMBLY AND PRE-FLIGHT INSPECTIONS 1. Before arriving at your flying field, be sure all your batteries are properly charged and all radio systems are in proper working order. 2. Installation of Rudder Rudder is removable for convenience in transportation, it is connected to fuselage by inserting a 1.8 mm steel rod through the hinge line. Then install pull-pull ball links on control horns.
3．Installation of Elevators Connect extension servo wire, secure with safe clips. Attach elevators with 3X12mm Hex-head bolts and washers. 4.Install the wings onto the fuselage being careful to align the wing tube with the wings and not force it. The wing tube may be initially tight but will loosen some with use. Guide your servo wires into the fuselage openings and connect to the proper aileron channels. Servo clips are recommended.
7. If you have removed your horizontal stabilizers, install them once again and check all bolts and connections. 8. Check all control surfaces for secure hinges by performed a slight tug on the control surfaces and observing if there is any give in the hinges. Check all control rods, ball links, servo screws, etc. for proper operation and installation. 9. Check your batteries and perform a proper range check once again with the engine off and running.
* KUZA CNC Aluminum Fuel Dot 3 color to choose: black, blue, red KAG0231B or KAG0231U or KAG0231R * KUZA CNC Aluminum Fuel Vent Line Plug 3 color to choose: black, blue, red No. KAG0232B or KAG0232U or KAG0232R * KUZA Fuel line clips 10PCS No. KAG02454 No.
* KUZA 1x servo tray No. KAG0T01 * KUZA Heavy duty 7075 aluminum Servo Arm For Futaba servo（25T）： 47mm/1.75in Single No. KAG0S7F 100mm/4in Dual No.
For Hitec servo（24T）： 47mm/1.75in Single No. KAG0S7H 100mm/4in Dual No. KAG0D73H For JR servo（23T）： 47mm/1.75in Single No. KAG0S73J 100mm/4in Dual No. KAG0D73J * KUZA new KAG0093 Wingbag for 50CC Two color to choose: red/ black, blue / silver No.
GoldWing RC www.goldwingrc.
