Related Manuals for Carf-Models Yak 55SP
Summary of Contents for Carf-Models Yak 55SP
- Page 1 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Instruction Manual Composite-ARF Yak 55SP, 2.1m (83”) TAVS Technology version 1.0...
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Page 2: Liability Exclusion And Damages
Instructions for Yak 55SP IMAC-Airplane Thank you very much for purchasing our Composite-ARF Yak 55SP 2.1m (83” span) all compos- ite aircraft, made with the revolutionary Total Area Vacuum Sandwich (TAVS) technology If you want a full-color version of this manual, you can download it free of charge from our web- site, as an Adobe Acrobat .pdf file and print it. - Page 3 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Important Supplementary Notes Pre-Assembly Checks: At Composite-ARF we take every possible precaution to make sure that all our products are carefully checked before they leave the factory - but of course it is always possible that human error creeps in occasionally with high-volume production, and that an important part has been incorrectly installed or glued into position.
- Page 4 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Make sure that the plane is secured properly when you start up the engine. Have a helper hold NO !!! your plane from the tail end, or from behind the wing tips, before you start the engine. Make sure that all spectators are behind, or far in front, of the aircraft when running up the engine.
- Page 5 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com wing, not in the centre. This is NOT a disadvantage, if you program in about 10% NEGATIVE aileron differential in Centreline of hinge axis your transmitter. This means that the ‘down’ throw needs to be about 10% more than the up throw. Why? Because the axis of the hinge is not at the centreline of the aileron, so it moves slightly in and out when operated, and the aileron gets a little "smaller"...
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Page 6: Tools And Adhesives
Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Take Care: Composite sandwich parts are extremely strong, but fragile at the same time. Always keep in mind that these contest airplanes are designed for minimum weight and maximum strength in flight. Please take care of it, especially when it is being transported, to make sure that none of the critical parts and linkages are damaged. - Page 7 ! Email us: feedback@composite-arf.com. Accessories This is a list of the things you may need to get your Composite-ARF YAK 55SP 2.1m (83”) into the air. Some of them are mandatory, some of them can be chosen by you. What we list here are highly recommended parts, and have been thoroughly tested.
- Page 8 About the Yak 55SP 2.1m (83”) The 2.1m Yak 55SP flies like a pattern plane, but on top of this it has enormous 3D-capabili- ties. It’s bigger than one would think, and it feels much bigger than 2.1m span, which is due to the deep chord of the wing.
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Page 9: Building Instructions
Composite-ARF Yak 55 (2.1m/83”) 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. You can complete the assem- bly of the wings and stabs at any point. - Page 10 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Both main legs are identical. Drill through the two molded in dimples in the top of each leg, with a sharp 5.5mm diameter bit. Using the M4 T-nuts to check the position, drill four Ø 2mm holes around each Ø...
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Page 11: Cockpit Canopy
Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com number of washers and wheel collars required to give the correct clearance between the wheel and the wheelpant. For safety add a drop of Loctite to the lock- nut on the inside of the carbon leg also. C-ARF can supply an optional tailwheel assembly for this Yak 2.1m, or use any 25mm/1”... - Page 12 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com the fuselage to account for the thickness of the T-nuts. Make up the 4 blocks that will be glued in the fuselage using the milled 3mm plywood squares (20 x 20mm) supplied, exactly underneath each slot a shown. It is important that the inside surface of the blocks is per- pendicular to the fuselage flanges.
- Page 13 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Make some ‘handles’ from strong tape (see photo) to allow you to ‘pull’ the canopy in position while you fix it into position. With the canopy frame bolted to the fuse- lage, tack the canopy into posi- tion with a couple of very small drops of ‘odourless’...
- Page 14 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com included in the hardware bag. Sand or scrape any seams on the fuselage and cowling that might prevent it sitting perfectly flush. File notches in the back flange of the cowl- ing to allow it to fit over the flange on the fuse- lage (arrowed in the photo right).
- Page 15 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Horizontal Stabs The stabs are 95% factory-finished and the hinging is completed, using 4 large Robert hinge-points in each elevator - so you only need to install servos, horns and linkages. The fibreglass tube inside the fuselage that accepts the carbon stab spar, and the holes for the anti-rotation pins are also jig-installed at the fac-...
- Page 16 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com dard sized servos. NB: Screw the servos into place with the Ø 2.9 x 13mm screws provided in the kit - not the standard screws that come with the servos. The slots for the supplied phenolic elevator horns are already partly milled in the elevators, but you will need mill them deeper - to at least 13mm (1/2”) depth so that the phe- nolic horn fits into the balsa block in the eleva-...
- Page 17 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com M3 nuts for each stab, as shown in the photos. The clevise should be positioned in the servo arm hole about 25mm from the servo centre, and on the elevator horn it should be on the 4th or 5th hole out from the elevator surface - to maximise the mechanical advantage and reduce any chance of flutter.
- Page 18 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Rudder The rudder is hinged to the fin using the Ø 2mm wire (sup- plied) which passes thru’ the 3 phenolic hinge posts that are factory-installed and aligned. File a point on one end of the wire, and a short 90°...
- Page 19 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com the ends a bit for a perfect fit. Rough up the fuselage sides before gluing the complete assembly into place with 30 min. epoxy, and then reinforce these important joints with the glassfibre tape provided in the kit, and 24hr laminating epoxy (see photo).
- Page 20 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Wings The wings are 95% finished at the factory, and have already been installed on your fuselage to check alignment. They fit on a Ø 30 x 790mm aluminium alloy spar tube, with 6mm Ø fibre- glass rod anti-rotation pins at the front and back, which are all completed for you.
- Page 21 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com 90° square. Fix the servos into the mounts with the Ø 2.9 x 13mm screws, and place them on the hatch covers to check that the servo arms are in the centre of the slots milled in the hatch covers, and aligned with the aileron horns.
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Page 22: Motor Installation
Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Motor Installation The new Composite-ARF Yak 2.1m design allows so many different choices of power unit that it’s impossible to provide mounting bulk- heads & hardware for all of them! Therefore, depending on your choice of gas engine you may need to modify the milled plywood parts we have included, or even make a few of your own. - Page 23 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com trelines; in the case of the DA-50 these are 66mm apart vertically and 78mm apart horizontally. Temporarily clamp the 2 ply fire- walls together, allowing an equal overlap of about 3mm all around (see photo page 22), as the inner plywood is bigger than the front 10mm one, and drill thru’...
- Page 24 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com or whatever bolt size is needed for your stand-offs. Use an Incidence meter on the wing root, and against the prop-driver or spinner backplate of the motor to set the down-thrust to about 0.5 degrees for the first flight. Add washers behind the (pilots view) left side stand-offs and the front firewall to set the right thrust to...
- Page 25 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com be 70mm (2.75”). Radius both ends of the cutout as shown. The dimensions of this slot can be adjusted to fit your chosen exhaust sys- tem as needed, within the overall size of the molded exhaust tunnel.
- Page 26 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com hook the spring over the sheetmetal screws - as shown in the photos. Full-Length tuned pipe A full length MTW tuned pipe and manifold for the DA-50 is available from C-ARF as an option. Please see the ‘related products’ link above each color scheme photo on our website for part numbers and prices.
- Page 27 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Fit the correct stopper to the fuel tank for the fuel type used. (If using Dubro tank the gasoline stopper has a small ‘O’ moulded in the top of it). We use the excellent ‘Tygon’ brand of fuel tubing for all our models.
- Page 28 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com formance and flying characteristics. The DA- 50 powered version shown here is about 7.1kg, dry. Of course, the final weight of your model will depend a lot on the power plant and battery type used, and if you decide to add any trim or paint to the model.
- Page 29 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com If fitting the switches into the outside surface of the fuse- lage, as shown, you should reinforce the area inside with a small patch of 3mm thick plywood to reduce vibration transmissions to the switches. The Powerbox switches all come with card templates for cutting the slots.
- Page 30 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Did you fit short Tygon or silicone tube pieces over all the clevises? Did you tighten the M3 locknuts against all the clevises? Are the crimp tubes crimped up nice and tight on the rudder cables? Have you put clear tape over the end of the rudder hinge wires and on the stab bolts ? Don’t forget to tighten the large Plastic M6 wing retaining nuts before flying! For added security add one small drop of loctite/thread locking compound on all engine...
- Page 31 In General Your Yak 55SP has very large control surfaces, which makes it very sensitive and reactive. It is always possible that these huge control surfaces can flutter at high speeds if the assembly, servo...
- Page 32 - rather than reducing the throws electronically in your transmitter. We hope that you enjoyed building your Yak 55SP. Please let us know, if you think that any hard- ware is missing or inadequate. We have tried to make this airplane as complete as possible, and with good feedback from customers you will help us to continue making good things even bet- ter.
- Page 33 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Wheel collars I.D. 4mm (wheel centering) Allen bolt M4 x 16mm (to attach canopy frame) T-nut M4 (to attach canopy frame) Phenolic plate 15mm x 60mm (for canopy/cowling alignment tabs) Spring, Ø 4mm x 70mm long (to secure muffler to rear mount) Silicone tube Ø...
- Page 34 Composite-ARF Yak 55 (2.1m/83”) techsupport@composite-arf.com Standard Wood parts included in the kit Standard Hardware included in the kit Version 1.0 - Mike C (14 Dec 2007) Mac...