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Composite-ARF IMPACT F3A-type Instruction Manual

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Instruction Manual

Composite-ARF IMPACT
TAVS Technology
version 1.0

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Summary of Contents for Composite-ARF IMPACT F3A-type

  • Page 1: Instruction Manual

    Composite-ARF IMPACT techsupport@composite-arf.com Instruction Manual Composite-ARF IMPACT TAVS Technology version 1.0...

  • Page 2: Liability Exclusion And Damages

    However, as manufacturers, we at Composite-ARF are not in a position to influence the way you build and operate your model, and we have no control over the methods you use to install, operate and maintain the radio control system components.
  • Page 3 Composite-ARF IMPACT techsupport@composite-arf.com He should be capable of detecting potential weak points and errors. Be certain to keep to the recommended CG position and control surface travels. If adjustments are required, carry them out before operating the model. Be aware of any instructions and warnings of other manufactur- ers, whose product(s) you use to fly this particular aircraft, especially engines &...

  • Page 4: General Information About Fully-Composite Aircraft Structure And Design

    Composite-ARF IMPACT techsupport@composite-arf.com General information about fully-composite aircraft structure and design All the parts are produced in negative molds, manufactured using vacuum-bagged sandwich construction technology. All parts are painted in the moulds, either single colour or designer colour schemes. A new production method, called TAVS (Total Area Vacuum Sandwich), enables us to present this aircraft with incredible built-in strength, while still being lightweight, and for a price that nobody could even consider some years ago.
  • Page 5 Composite-ARF IMPACT techsupport@composite-arf.com The Stabilisers The stabiliser parts are also vacuum bagged sandwich. construction. The ele- vator control surfaces are elastic- hinged, and the rudder is hinged with a Robart Pin-Hinges. The rudder & elevator design gives at least 40 degrees throw. The horizontal stabs are mounted on a 10mm carbon tube and one 6mm Ø...
  • Page 6 Composite-ARF IMPACT techsupport@composite-arf.com The ‘Paint Job’ Occasionally customers see certain problem areas with composite parts. But the question is: Are these real prob- lems, or are they just a misunderstood sign of high-tech construction, proving high-end composite technology? Seams ALL composite parts have seams. They are there today, and they will be there forever.

  • Page 7: Tools And Adhesives

    Microballoons, for adding to slow epoxy for lightweight filling. 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 hardware should be included, please feel free to let us know.
  • Page 8 Accessories This is a list of the things you may need to get your Composite-ARF IMPACT in the air. Some of them are mandatory, some of them can be chosen by you. We know that F3A and Pattern fliers have their own favourite hardware and equipment, and what we list here are recommended parts, and have been thoroughly tested.

  • Page 9: Building Instructions

    Composite-ARF IMPACT techsupport@composite-arf.com Building Instructions General Tips We recommend that you follow the order of construction shown in this manual for the fuselage, as it makes access to everything easier and saves time in the end. The first thing to do is protect the finished paint on the outside of the model from scratches and dents during assembly - so cover your work table with a piece of soft carpet, cloth or bubble- plastic.
  • Page 10 Composite-ARF IMPACT techsupport@composite-arf.com same time you can open the air inlet hole in the front of the cowling, as shown. Sand any seams on the fuselage and cowling that might prevent it sitting perfectly flush, and tape in position. Now...

  • Page 11: Landing Gear

    Composite-ARF IMPACT techsupport@composite-arf.com Landing Gear Fit the landing gear bulkheads and main landing gear legs now, and leave these in place to pro- tect the bottom of the fuselage during the rest of the assembly. Assemble the landing gear support from the 3 pieces of 3mm carbon/ply composite supplied as shown, and tack together with thin CA.
  • Page 12 Composite-ARF IMPACT techsupport@composite-arf.com Fit your choice of tailwheel, along with any ply- wood plate that might be necessary inside the rear fuselage. Any 1” or 1.25” lightweight pattern style will do, such as Kato, IMK or similar. To set the correct angle of the wheelpants in relation to the ground, set the fuselage on a level surface with your choice of tailwheel in place.
  • Page 13 Composite-ARF IMPACT techsupport@composite-arf.com hole 3.5mm Ø. Scuff up inside the canopy around the hole and apply a blob of very thick 30minute epoxy/microballoons. Oil or wax the Hatch Catch pin again and hold it back, tape the canopy tightly in position and then push the catch forward into place.
  • Page 14 Composite-ARF IMPACT techsupport@composite-arf.com outside of the fuselage in the area of the wing an stab roots, and also the inside surfaces of the 2 short lengths of 12mm carbon tube that will be glued into the wing roots for alignment of the 10mm carbon anti-rotation tube.
  • Page 15 Composite-ARF IMPACT techsupport@composite-arf.com think, and will easily see even a 1mm difference. When satisfied, permanently glue the short 12mm Ø carbon stab tube and reinforcing rings inside the fuse- lage with a thick epoxy and microballoons mix, and also the fibreglass wing tube and it’s egg-shaped reinforcing rings.
  • Page 16 Composite-ARF IMPACT techsupport@composite-arf.com plastic nuts until cured. Open up the milled holes in the back of the root ribs of both wings so that the short 12mmØ carbon tubes fit in easily. Wax both ends of the 10mm anti-rotation tube where it projects outside the fuselage, the inside surface of the 2 short 12mmØ...
  • Page 17 Composite-ARF IMPACT techsupport@composite-arf.com Refit the stab and carbon spar to the fuselage, and then the other stab, making sure that both roots are tightly against the fuselage. Drill and tap for the M3 securing bolt in the 2nd stab in the same way.
  • Page 18 Composite-ARF IMPACT techsupport@composite-arf.com Make up the linkages to your choice - we have used M2.5 clevises and 2.5mm steel wire, with the clevise soldered onto one end, and a locknut on the other end to prevent accidental move- ment. However, If using a gas or glow motor with higher vibration levels, then we recommend that you use 3mm Ø...
  • Page 19 Composite-ARF IMPACT techsupport@composite-arf.com may need long servo arms for the aileron link- age, and shown here are the C-ARF phenolic servo arms used on some of our other kits. If using the supplied phenolic control horns, or plastic or phenolic servo arms do NOT use sin-...
  • Page 20 Composite-ARF IMPACT techsupport@composite-arf.com This also makes sure that you don’t scrape all the epoxy/microballoons mix off when inserting the fin post into the fuselage. (See photo) Hold the fin post against the rudder LE, mark through the holes to give you the hinge positions and drill 4.5mm Ø.

  • Page 21: Motor Installation

    Composite-ARF IMPACT techsupport@composite-arf.com considerations. We have used a foam-board plate, reinforced underneath with a couple of balsa sticks, and glued to the fuselage sides with epoxy and micro-balloons. This plate also holds the Receiver and (optional) switch, and only weighs 22 grams - a stiff and lightweight solution.
  • Page 22 Final adjustment to thrustlines can be made after trim flights to suit your particular combination, if necessary. A 90mmØ (3.5”) lightweight moulded carbon, painted, spinner with CNC machined aluminium backplate is available as an option from Composite-ARF for this plane - see website for details.
  • Page 23 Composite-ARF IMPACT techsupport@composite-arf.com Above we have shown a couple of typical glow engine installations, with a Mintor 3M 140 and an OS140RX. The photos of the Mintor 3M are taken in a Revolution Pro, not an Impact, but the principles are very similar.

  • Page 24: Electric Power

    Composite-ARF IMPACT techsupport@composite-arf.com The batteries will have to be positioned to suit the Centre of Gravity, and are normally the last items to be installed. Don’t forget that you might wish to alter the C of G position a little after the first few trimming flights, so try to allow for some adjustment.
  • Page 25 Composite-ARF IMPACT techsupport@composite-arf.com Reps/Customers, with great success. In addition C-ARF can supply both of these rec- ommended motors, together with the correct Speed Controllers and a choice of LiPo Flight packs, and charger as options. Please see our website for full details.
  • Page 26 Composite-ARF IMPACT techsupport@composite-arf.com (included in the Elec-option pack), into M4 blind nuts. Use the motor with the spinner backplate bolted onto it, with three 1.5mm spacers tacked onto the back of the spinner backplate, to cen- tre the motor and set the side and down thrust exactly parallel to the front face of the nose. (see Gas and Glow engines section above for more detail).
  • Page 27 Composite-ARF IMPACT techsupport@composite-arf.com ance for the 3 bolts that secure the motor to the 2mm thick carbon plate. Don’t forget to add a drop of Loctite on all these mounting bolts ! Small thrustline adjustments can be made after trimming flights by adding additional washers between the carbon washers and the bulkhead.
  • Page 28 Composite-ARF IMPACT techsupport@composite-arf.com of Gravity. In this set-up it was fixed next to the speed controller, and this gave a C of G at the nose-heavy end of the range - fine for first flights. The complete plane, ready-to-fly with the Plettenberg, LongGo flight pack, future speed controller &...

  • Page 29: Battery Handling

    Composite-ARF IMPACT techsupport@composite-arf.com You should go towards more cooling, rather than less, and pay particular attention that the area of the exit area for the cooling airflow is at least as big as the air entry area. Open up the cool- ing entrance in the lower front of the cowling as shown in the photos.

  • Page 30: Final Check

    Composite-ARF IMPACT techsupport@composite-arf.com Final Check Check that you have fixed all components securely. Keep in mind that everything inside the air- craft is loaded with the same G’s as the wing and the wing spar during aerobatic manoeuvres. Check engine, cowling, wing and stab mounts carefully again.
  • Page 31 Composite-ARF IMPACT techsupport@composite-arf.com Setting Up Your Aircraft C of G range: Back of wing tube to Centre of Gravity: 6mm behind back of wing tube. For the 1st flights set the Centre of Gravity between the back edge of the wing tube and up to 6mm (1/4”) behind this position.
  • Page 32 We appreciate your comments very much. Email: feedback@composite-arf.com Thank you! Your Composite-ARF Team Flying and Trimming During your first flight you should get a feel for the plane, and then set your control throws for your liking. The ones shown above will be fine for the first flights anyway. Get used to the flying characteristics, you will notice immediately how light the plane is, and that it might have to be flown a bit differently than other pattern planes you might be used to.
  • Page 33 Composite-ARF IMPACT techsupport@composite-arf.com Last but not least, there is another variable, this is the thrust-line of the engine. This is impor- tant, and should be measured in relation to the wing. It makes things easy, and we will refer in this section all angles of attack to the wing as a zero point.
  • Page 34 Composite-ARF IMPACT techsupport@composite-arf.com thing you have flown, and can confirm that the incidences, the thrust lines and the CG is 100% correct, THEN and ONLY THEN, you can go ahead and change the incidence on the stab (and only the stab) permanently. Measure the trim you needed for perfect level flight at the trailing edge of the elevator.
  • Page 35 Composite-ARF IMPACT techsupport@composite-arf.com Appendix Packing List Impact Kit Main Items Art.-Nr. Quantity Description English Fuselage Right wing Left wing Right stabiliser Left stabiliser Rudder (attached to fuselage) Cowling (belly pan) Canopy Right wheel pant Left wheel pant Right landing gear, carbon Left landing gear, carbon Carbon Wing tube 30Ø...

  • Page 36: Available Accessories

    Composite-ARF IMPACT techsupport@composite-arf.com Wood Parts Art.-Nr. Quantity Description English Landing Gear mount parts (carbon/ply/carbon) Firewall (carbon/ply/carbon) Reinforcement rings (carbon/ply/carbon) 10mm I.D. Reinforcement rings (carbon/ply/carbon) 12mm I.D. Reinforcement rings (carbon/ply/carbon) 6mm I.D. Nose Ring (carbon/ply/carbon) Fin post for Rudder (balsa/glass) Doublers for Fin Post (balsa/glass)
  • Page 37 Composite-ARF IMPACT techsupport@composite-arf.com Impact fuselage tail formers. Make from 3mm balsa. Mac Mike Cherry (8 Dec 2004)

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