Summary of Contents for Jetworks Fairchild A-10 Thunderbolt II Parkjet mk2
- Page 1 Fairchild A-10 Thunderbolt II Parkjet 4th Generation Jet Fighter Construction Guide © 2016 Craig Clarkstone. All rights reseved © 2019 Craig Clarkstone. All rights reseved...
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Page 2: Designers Notes
‘Hog’ History Designers Notes Affectionately called the “Warthog” for its aggressive look and The first time I saw the ‘agricultural’ functional lines of the A-10, It was often painted with teeth on the nose cone, the A-10 Thunderbolt unlike anything I had ever seen, and to be honest It took a bit of II is the U.S. - Page 3 Construction...
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Page 4: Before You Start
Before you start. Adhesives > For the majority of construction : - UHU Creativ for Styrofoam (also called UHU POR) - 3M 77 Spray adhesive. >For wing spars and motor mounts : - Epoxy. (5 and 15mins cure times are the most convenient) micro-baloons can be added to reduce weight. - Page 5 All versions Glue the 3mm liteply Forward retract parts together and then to the Retract support panel. All versions Glue Bulkhead 1 and Bulkhead 2 to the assembly. A-10 Thunderbolt II Page 5...
- Page 6 All versions Align the Retract space bulkhead to the edge of the retract aperture as shown, glue in place. Glue the Nosecone aligner in place. All versions Using the previous assembly as a 2nd Push down (while pushing forward) guide, crush bend the forward fuselage bottom.
- Page 7 All versions Fuselage sides - choose either 3D printed Nacelles or not. Cut to suit Glue the Cockpit support sides in place. All versions Carefully crush bend the fuselage sides as shown. A-10 Thunderbolt II Page 7...
- Page 8 All versions Glue the components together as shown. All versions Glue Bulkhead 3 and Bulkhead 4 to the assembly. A-10 Thunderbolt II Page 8...
- Page 9 All versions Glue the Tail reinforcement piece in place as shown For the non-3d printed version, Non 3D printed Glue the 3mm Liteply Motor spar to the assembly. A-10 Thunderbolt II Page 9...
- Page 10 For the 3D printed twin pusher Twin Pusher only version, print out the parts and glue 3D printed together using UHU por. Printed Printed Part Part Use twin racing quad motors (4s) and (optional) 5" contra rotating props. Run the cables through the cable slot - you may want to extend the cable length before you fix the motors in place.
- Page 11 For the tail pusher version - simply Single Pusher only glue the nacelle parts together 3D printed using UHU por. Printed Printed Part Part (optional) Run the motor cables through the Twin EDF only channels cut for them. 3D printed A-10 Thunderbolt II Page 11...
- Page 12 All versions Glue the forward canopy support to the assembly. All versions Laminate all the pieces of the nosecone together. Sand to shape. A-10 Thunderbolt II Page 12...
- Page 13 All versions Glue the nosecone to the assembly using the nosecone aligner to locate it. All versions Alternatively, print the 3D printed nosecone and glue to the assembly using the nosecone aligner to locate Printed Printed Part Part (optional) A-10 Thunderbolt II Page 13...
- Page 14 All versions Glue the Canopy Magnet support panel to the assembly. All versions Carefully crush bend the Lower wing piece so that the wing crank is the same angle as the wing spars. A-10 Thunderbolt II Page 14...
- Page 15 All versions Glue the four cranked Wing spars in place using epoxy. These can Printed Printed be lite-ply or 3d printed plastic. Part Part The bottom of the wing spar should (optional) be aligned flush with the underside of the wing, and protrude 6mm above the top of the wing.
- Page 16 All versions Coat both surfaces with UHU Por and carefully stick together. I suggest that you use pencils to hold the glued wings apart while you align them. Start at the centre and work outwards. All versions glue the 6mm carbon spar into both vertical stabilisers.
- Page 17 Glue the 6mm carbon spar into the All versions horizontal stabiliser. Use masking tape to contain the epoxy and give a smooth finish. All versions Dry fit the elevators and elevator hinges. Do not glue at this stage. I like to use graupner mini hinges. A-10 Thunderbolt II Page 17...
- Page 18 Bend 0.5mm piano wire into shape, All versions Remove a brass ball from a ball & socket joint, and solder the two ends into the hole in the ball. You may need to file the piano wire a little to get them to fit. Use wet-n-dry to rub away any excess solder.
- Page 19 All versions All versions Sand a semi-circular leading edge on the elevators. Cut away a recess for the hinges to enable a clean movement. Use a scrap piece of 6mm tube to shape a concave trailing edge to the horizontal stabiliser - in order to get a nice fit with the elevators.
- Page 20 Slide the wing assembly into the All versions fuselage. Orientate correctly, mark its position on the wings with a pencil. Slide out of centre, apply epoxy to the areas that will be in contact when correctly aligned. Slide the wing back into place. Wipe off...
- Page 21 Sand the Wing supports to shape. All versions All versions Glue the wing supports to the intersection between the fuselage and wing as shown. A-10 Thunderbolt II Page 21...
- Page 22 All versions Glue the winglets to the wing-tips as shown. Sand to shape to represent the real plane. All versions Alternatively, trim back the wing 14mm and glue on the 3d printed winglets. Printed Printed Part Part (optional) A-10 Thunderbolt II Page 22...
- Page 23 Laminate the tail cone pieces All versions together Alternatively you can 3D print a All versions nosecone. Printed Printed Part Part (optional) A-10 Thunderbolt II Page 23...
- Page 24 Epoxy the horizontal stabiliser All versions assembly onto the fuselage. Use the tab to achieve correct alignment. In top view, ensure that the horizontal stabiliser is mounted 90 degrees to the centreline of the fuselage. All versions Glue Bulkhead 5 in place. make a hole in it if required to elevator control horn clearance.
- Page 25 Glue the Wing wheel shroud All versions bulkhead and the Wing wheel inner and outer sides together. (make two mirrored assemblies) All versions Laminate the Wheel shroud nosecone pieces together and then glue to the Wheel shroud assemblies. Alternatively you can 3d-print nosecones Printed Printed...
- Page 26 Create a wedge shaped piece of Twin Pusher only balsa that will incline the plastic Non 3D printed stick mount 5 degrees, when mounted to the underside of the lite-ply motor mount spar. Hobbyking - OR004- 00602 There are 3d print versions available - see website.
- Page 27 Cut the EDF motor spar out of 3mm Twin EDF only lite ply. Non 3D printed Use the jig to position the EDF units at the correct vertical position and angle. Hold the EDF units in place using hot-melt glue. Use balsa blocks to reinforce the Twin EDF only joint top and bottom, using epoxy to...
- Page 28 Mount the front undercarriage, All versions HobbyKing screwing to the 3mm lightply in the HK-15094M fuselage. I used a 3mm hardened steel rod. A scale sized nosewheel would be between 40 and 45mm diameter All versions Mount the wing retract as shown here.
- Page 29 Run the Single or Twin ESC’s so All versions that they align with the aperture in the belly panel to allow cooling. I recommend if you are using retracts to run them on a separate BEC to avoid dip in voltage to the RX.
- Page 30 Glue the wing wheel shrouds to the All versions wing, and adjust the retracts / wheels to fit. All versions View from above A-10 Thunderbolt II Page 30...
- Page 31 Trim away the depron to All versions single accommodate the cables to the pusher ESC. For the single pusher exit hole version cut a hole at the end of the fuselage belly panel and run the ESC cables through. Stick on the belly panel All versions Use a long craft knife initially to trim...
- Page 32 Glue the tail cone on to the fuselage. All versions Printed Printed Part Part (optional) For the single pusher version, glue All versions the base onto the fuselage with epoxy. Once you have bolted the motor mount to the motor, slide the motor assembly into the base.
- Page 33 Sand the top edges of the wingtips All versions to give that ‘A-10 shape. Alternatively trim the wingtip by All versions 14mm and glue the 3d printed winglets on. Printed Printed Part Part (optional) A-10 Thunderbolt II Page 33...
- Page 34 Trim away the ailerons from the All versions wing. Shape the ailerons into an aerofoil All versions shape like shown. A-10 Thunderbolt II Page 34...
- Page 35 Glue the reciever in place in the All versions fuselage above the wing. I like to extend a ‘bind’ wire into the cockpit area in case I need to re- bind the RX. That way I wont need to cut open the fuselage - I simply use a servo extension lead.
- Page 36 Glue the ailerons back onto the All versions View from top wing. Make a servo horn and connect the All versions servo to it using piano wire. View from underside The throw of the aileron needs to be +/- 30 degrees. A-10 Thunderbolt II Page 36...
- Page 37 Stick 2 lengths of 20mm wide 6mm All versions depron along the top edges of the fuselage as shown. A single length can be used behind the nacelles. Later the fuselage will need to be sanded like this :- Run a sanding block over the All versions fuselage to ensure a flat surface, then glue the Fuselage top to the...
- Page 38 Glue the vertical stabilised in place All versions using epoxy. Ensure that they are glued 90 degrees to the horizontal stabiliser. Glue the top fuselage ridge piece in All versions place as shown. For the 3d printed nacelles, simply trim off the tab and glue over the centreline.
- Page 39 All versions Rare-earth Magnet attachment process Create the canopy in the same way as the nosecone, or 3d Print one, and add a tongue and magnets as shown. Magnets 3mm lite ply depron spacer tongue 1. press magnet into depron to impress shape. 2. Dig out a recess for the magnet 3.
- Page 40 Glue the Nacelle bridge and Non 3D print versions Nacelle bridge supports together. Shape the forward edge and glue to the assembly as shown. Non 3D print versions Either create your own nacelles using 3mm depron, or use a 1litre fizzy water bottle trimmed to size to create the Nacelle shape.
- Page 41 If you have chosen to use a plastic Non 3D print versions bottle to create your nacelle, you will need to create a soft leading edge. To do this create two depron rings in - one to sit inside, and one to sit in front of the bottle.
- Page 42 Assembly the avionics pod and All versions with Retracts glue to the fuselage as shown Printed Printed Part Part (optional) Glue the lower fins in place as All versions with Retracts shown. Printed Printed Part Part (optional) A-10 Thunderbolt II Page 42...
- Page 43 Carefully cut the nacelles to slide Non 3D print versions over the plywood spar and butt up to the nacelle supports. The pieces will need some finer shaping to ensure a good fit. Once butted use UHU por to hold in place.
- Page 44 Use photo’s to help shape Your model to represent the real plane A-10 Thunderbolt II Page 44...
- Page 45 Increase throttle 100% throttle 50% throttle as speed increases IMPORTANT : Due to the high engine positions on the original plane. The thrust angle is inclined to intersect the Centre of Lift - see diagram below. If you hand launch with full thrust, the plane may not lift into the air, as the downwards thrust will overcome the lift generated at slow speeds of a hand launch.
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