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Summary of Contents for Composite-ARF Extra 260
- Page 1 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Instruction Manual Composite-ARF Extra 260, 2.6 m TAVS Technology Version 1.0...
- Page 2 Total Area Vacuum Sandwich (TAVS) technology. It is based on our 3m version of the Extra 260, but reduced in size to suit the most popular 75 - 120cc engine sizes. A few of the photos in this instructions that explain ‘standard’ techniques and methods are actu- ally of parts from different planes, and this will be obvious from the paint colors/schemes - so please don’t get confused !
- Page 3 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com The first time you fly any new model aircraft we strongly recommend that you enlist the help of an experienced modeller to help you check the model and offer advice while you are flying. He should be capable of detecting potential weak points and errors.
- Page 4 If you carefully checked all the points above and followed our advice exactly, you will have a safe and successful first flight - and many hours of pleasure with your Composite-ARF Extra 260. General information about...
- Page 5 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com The bottom slot needs some explanation, too. The cut line is exactly in the correct position so that the aileron slides Centreline of hinge axis under the wing skin smoothly. If the cut was a few mm for- ward or back, it would not work properly.
- Page 6 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com strength for any engines up to 120cc on the market today. See the Engine Installation section for details of engine and setting thrust angles. The engine cowling should be attached using the method shown. It is only a little work and this mounting has been tested and proven for many years.
- Page 7 Accessories Below are the things you may need to get your Composite-ARF Extra 260 (2.6m) in the air. Some of them are mandatory, some of them can be chosen by you. What we list here are highly rec- ommended parts, and have been thoroughly tested.
- Page 8 This is a very quick and easy plane to build, not requiring difficult techniques or special equip- ment, but even the building of Composite-ARF aircraft requires some suitable tools! You will probably have all these tools in your workshop anyway, but if not, they should be available in all good hobby shops, or hardware stores like "Home Depot"...
- Page 9 At Composite-ARF we try our best to offer you a high quality kit, with outstanding value-for- money, and as complete as possible. However, if you feel that some additional or different hard- ware should be included, please feel free to let us know.
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Page 10: Landing Gear
The Composite-ARF landing gear for the Extras consists of 45 deg laminated carbon fibre and fibreglass cloth and a huge number of rovings inside, all made under vacuum and heat-cured. - Page 11 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com inside them. The centre of the holes should be 18mm from the front edge of the carbon (photo above). The legs are fixed to the plane with the M6 x 20 bolts and 13mm Ø washers into the blind nuts that are installed in the plywood supports during manufacture (photo P2).
- Page 12 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Install your chosen wheels (Ø5” Dubro 500TL shown), inserting the M6 x 70mm steel axle bolt through the hole you drilled in the outside surface of the wheelpant. Depending on the thickness of your chosen wheel, you will need...
- Page 13 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Cowling The 1 piece cowling is already cut and trimmed at the fac- tory, and should need very little adjustment for a perfect fit. With the main undercarriage legs bolted into place, install the wing tube in the fuselage sleeve and place a small spir- it or incidence meter level on top of it to set the plane exact- ly level (side to side).
- Page 14 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Canopy Frame The fibreglass canopy frame mountings are already com- pleted for you at the factory. It is secured to the fuselage with four M4 x 10mm allen bolts, fitted from the outside of the fuselage, through the plywood tabs that are glued to the canopy frame, into M4 T-nuts.
- Page 15 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com strips of 10mm balsa to masking tape on the fuselage sides. This makes it easier to pull the clear canopy against the frame, using the tape ‘handles’ while tacking it in to place - without deform- ing the canopy frame.
- Page 16 Add a drop of Loctite to the bolt that secures the discs to the servos. Use this same method to attach the phenolic extension arms to metal discs for the aileron & rudder surfaces also. At Composite-ARF we only use the aluminium ‘Double-Loc’ servo arms from SWB manufactur-...
- Page 17 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com ing (USA) and we highly recommend them. These arms clamp onto the servo output shaft with no lost movement (play) at all. These are high quality, properly engineered arms, and are available from many good hobby stores.
- Page 18 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Make up the servo linkage from the hardware provided, and connect your servo arm to the con- trol horn, which helps to hold the horn in exactly the correct position while the glue cures. Fill the slot in the elevator with slow epoxy and micro-balloons (at least 30 minute cure), or a thixotrop- ic resin like Loctite Hysol 9462, insert the horn, and then wipe away excess glue.
- Page 19 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com (below) M3 blind nut glued into centre of the hole will be 26 - 28mm from the stab T.E. Thread the hole with an M3 tap and secure it with an M3 x elevator spar tube.
- Page 20 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com install it at the back of the cockpit, as shown in the photo right, but this will also depend on the weight and position of your batteries and exhaust system. Assemble the tray and install the servos and phenolic arms outside the model, and decide which position you will install it in.
- Page 21 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com (below) Cable exit slots in the fuselage, for the The pull-pull cables that connect the rear arm rudder servo tray in the forwards position. Slots to the rudder horn should be crossed, so that move back approx.
- Page 22 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com plywood servo mounts (photo P11). Sand and clean the inside surface of the servo hatch covers very well, and the milled plywood parts that make up the servo mounts to make sure you have a good gluing surface. This is very...
- Page 23 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Each servo hatch is fixed to the underside of the wing with of the 4 sheet-metal screws provided, Ø2.9 x 10mm. These servo mounts allow you to change a servo within a few min- utes, if needed, easily within the time between 2 flying rounds of a contest.
- Page 24 (above) For a 120mmØ spinner, ensures accurate alignment of the firewall. The front face measure 88mm down from a steel of the molded motor-dome/firewall on the Extra 260 is set straight edge placed on the fuse- at 0 degrees downthrust, and 0 degrees sidethrust.
- Page 25 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com 3W 80cc Xi. For this set-up we used a C-ARF 120mm diameter carbon spinner (# 810105), a Greve tuned pipe (# 910200), with the original manifold supplied with the 3W motor, and a Mejzlik 27 x 10 carbon 2-blade prop.
- Page 26 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com To set the sidethrust we added a stack of large diameter washers between the left-hand two standoffs and the fire- wall, of 5.5mm thickness. To add a very slight upthrust, we also added one thin washer (0.7mm thick) behind the lower 2 standoffs.
- Page 27 Shown here is the installation of a pair of MTW headers and TD75k canisters, as included in the optional set available from Composite-ARF. (see relevant webpage for details of currently available accessories & options). The assembled canisters and headers are inserted into the...
- Page 28 3W motor. The air exit at the bottom/rear of the cowl is rather small on the Extra 260 and, especially if you fly in a warm climate, we recommend that you extend it to the front by 50mm - as shown in the photo below.
- Page 29 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com in the bottom of the fuselage. As a general rule the total area of the air exits must be at least double the inlet area. For example if the hole in the motor dome for the tuned pipe is 75mm (3”) diameter (area = 4400mm...
- Page 30 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Fuel Tank Base The Fuel tank base supplied is a cnc milled balsa/compos- ite assembly, that also provides space for mounting the receiver and Powerbus system. It is reversible - so you can fit the Rx and Powerbus on either side of the fuselage.
- Page 31 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com R/C & Gear Installation Everyone has their own favourite methods and layouts when fitting the R/C and gear. The installation shown here, and on the full-color photosheets, are just a guide, but have worked perfectly in all of our planes flown by C-ARF factory staff, and many of our cus- tomers.
- Page 32 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com be wrapped in foam to isolate the soldered connections from vibration as much as possible. For a DA-100 powered example you should find that with all 3 batteries (2400 sub-C size) secured in the cowling, and the rudder tray in rear position, will easily give you the correct for- ward ‘pattern’...
- Page 33 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com (12”) are fitted with ceramic chokes (ferrite rings) to prevent RF noise, at the receiver end - normally within 100mm (4”) of the receiver. Of course, if you are using a ‘Powerbox’ this unit is already fitted with all the ceramic chokes. Also no ‘Y’...
- Page 34 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com the wire pushrod passes through a length of silicone tube in the bottom of the carbon plate to support and isolate it. (see photo on page 25, and P16) Motor Ignition System The ignition unit is normally fixed to the motordome, as close to the engine as possible - because of the length of the HT leads that connect to the spark plug(s).
- Page 35 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Are all tubes and wires protected from chafing where they pass thru’ the holes in fibre glass parts or bulkheads with rubber grommets, or short lengths of split silicone tubing? Especially if you have installed the internal mini-pipe set-up, you also must make sure that no fuel tubing or wires can come into contact the exhausts.
- Page 36 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Engine Thrustline: 2.5 - 3° depending on propeller Already given in the instructions, upthrust should initially be set at 0.5° degrees and right thrust 3 degrees, depending on the prop used. We recommend a 27 x 10 on a 75 - 80cc motor, and a 28 x10 carbon prop for any 100cc engine.
- Page 37 Lots of input from Jason Shulman, who's basic design it is, and from Frazer Briggs, who has been flying Extra 260’s for as long as he can remember, united with 15 years of composite production experience, has made this plane structurally and aerodynamical- ly unique.
- Page 38 We hope that you enjoyed building your Extra 260. Please let us know if you think that any hard- ware is missing or inadequate. We tried to make this airplane as complete as possible. With good feedback from customers you will help us to continue making good things even better.
- Page 39 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Appendix Extra 260, 2.6m Kit (version 1.0) Kit Contents Quantity Description Fuselage Wing, right (with 2 servo hatches taped in place) Wing, left (with 2 servo hatches taped in place) Stab, right Stab, left...
- Page 40 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Hardware List Fuselage Pack Quantity Description Allen Bolt M6 x 30mm (engine mounting) Allen bolt M6 x 16mm (engine mounting/standoffs) Washers, M6, large (engine mounting) T-nut, M6 (engine mounting) Allen bolt, M3 x 12 (cowling)
- Page 41 Desert Aircraft DA-100 motor (product #950000) Canister set for DA-100 (product # 910100) PowerBox 40/24, dual NiCad crossover unit. (product #960200) PowerSwitch, pair, 20A, for dual NiCads (product #960300) Please check our website : www.composite-arf.com, for current availability of options and accessories.
- Page 42 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com (above) Contents of Fuselage hardware pack Contents of Wing Hardware Contents of Stab Hardware pack (2 sets) pack (2 sets) (above) Contents of Rudder (above) Contents of Spare Hardware pack Hardware pack (above) Contents of Milled wood and Phenolic pack...
- Page 43 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Full-sized Baffle template for Extra 260, 2.6m span. Adjust back edge of baffle so that it is 6mm (1/4”) from cooling fins and crankcase of your motor. (This line suits 3W 80cc Xi motor)
- Page 44 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com...
- Page 45 Composite-ARF Extra 260 (2.6m span) techsupport@composite-arf.com Dimensions of header used with 3W X1 80cc motor and Greve tuned pipe. Mac Mike C (16 January 2007)
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