Composite-ARF Yak-55 SP Instruction Manual
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Composite-ARF Yak-55 SP Instruction Manual

Composite-arf yak-55 sp, 2.6m
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Composite-ARF Yak-55 SP (2.6m span)
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Instruction Manual

Composite-ARF Yak-55 SP, 2.6m
TAVS Technology
version: Preliminary

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Summary of Contents for Composite-ARF Yak-55 SP

  • Page 1: Instruction Manual

    Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Instruction Manual Composite-ARF Yak-55 SP, 2.6m TAVS Technology version: Preliminary...
  • Page 2 3) How to set up and trim your finished IMAC type aircraft perfectly to give you the most enjoy- ment from it. The new Composite-ARF 2.6m Yak-55 SP is based on our very successful 3.3m Yak-55SP (seen below in our limited edition ’Honeycomb’ design), which is one of the most revered planes in the IMAC and aerobatic scene, and uses the latest moulding technology and techniques to make it easy for you to get this plane in the air quickly, and on a very reasonable budget.

  • Page 3: 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 4: Danger Zones

    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 Yak-55SP.

  • Page 5: General Information About Fully-Composite Aircraft Structure And Design

    Composite-ARF Yak-55 SP (2.6m span) 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.
  • Page 6 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com than this. Make sure that the control horns are glued into the ailerons properly. The hole in the phenolic horn for the quick-link needs to be exactly perpendicular to the hinge axis line, and in this manual we show you a simple way to ensure that the horns in all pairs of control surfaces will be identical, making it easy to set up your R/C for accurate flying manoeuvres.
  • Page 7 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com The Stabilisers: The stab parts are also vacuum bagged sandwiched. The rudder and elevator control surfaces are hinged with 4mm ø aluminium tubes, fitted through phenolic hinge bearing plates which are installed during manufacture for perfect alignment.
  • Page 8 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com The ‘Paint Job’ Occasionally customers notice certain problem areas with composite parts. But the question is: Are these real problems, or are they just a misunderstood sign of high-tech construction, proving the high-end composite technology? Seams: ALL composite parts have seams.
  • Page 9 ‘positive’ there will be areas you won’t be happy with. Of course you won’t com- plain, because you created these flaws yourself… ! This is the FiberClassics (now ‘Composite-ARF’) force at the TOC 2000, with all models painted in the moulds.

  • Page 10: 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 11 Accessories Here is a list of the things you may need to get your Composite-ARF Yak-55SP in 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 12: Building Instructions

    Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Building Instructions Preliminary Instructions: This instruction manual is a ‘preliminary’ version, and will be followed shortly by a fully detailed manual - which will be downloadable from our website as a .pdf file, with full colour photos, dia- grams, and photo-sheets with larger images to stick on your workshop wall to provide quick reference during construction.

  • Page 13: Landing Gear

    - and you can leave these in place, as they will protect the bottom of the fuselage during assembly. Composite-ARF developed a new carbon fibre landing gear for the Yak 2.6m. It consists of 45 deg laminated carbon fibre cloth and a huge number of carbon tows inside, all made under vacuum and heat-cured.
  • Page 14 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com reinforcement installed in the fuselage at the factory. You do not need to make the tailwheel steerable, a simple castoring action is fine. However, for asphalt runways you may prefer to connect it to the rudder horn with 2 springs as shown.
  • Page 15 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com inside of the cowl with 30 minute epoxy and milled fibre. Be careful not to glue the cowling on permanently! This tab makes it easy to locate the cowling in the proper place, so that the bolts in the bottom line up with the securing M3 blind nuts etc.
  • Page 16 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Canopy Frame and Canopy Finished in 3 hours The canopy frame fits the fuselage already. It is important to finish the mounts step by step as advised below. The parts shown in the photo here are from the prototype, and production versions may look slightly different.
  • Page 17 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com If the joint area was waxed carefully, you can take off the canopy frame in about 1 hour. canopy frame Fitting the clear canopy into the frame is a lit- plywood plate tle bit tricky, but this is a step by step guide of...
  • Page 18 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com If you wish you can tint the inside of the canopy using one of the aerosol spray paints used for painting the inside of polycarbonate car bodies (eg: the Tamiya or Lexanit ranges). Use many very light coats to get even coverage.
  • Page 19 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com inside might break loose. Leave the tubes a bit long during construction, and cut them to length later. During final assembly, retain the ends of the tubes with a small piece of clear tape at the root and tip ends.
  • Page 20 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Composite-ARF phenolic servo arms, designed for this kind of aircraft and included in the kit. These must be fixed to the standard (25 mm/1” Ø) plastic output arms supplied with the servo with 2 small sheet-metal screws each. Rough up the bottom surface of the C-ARF servo arm and the top surface of the standard servo arm.
  • Page 21 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Rudder Finished in 2 hours Trial fit the the double-sided phenolic control horn in the slot that is already milled in the base of the rudder, and mark the part that will be glued in. Remove it, mask the exposed parts and scuff the centre part on both sides with coarse sandpaper.
  • Page 22 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com ening to make sure it is secure. Join the 4 ball-links with 2 lengths of M3 x60mm threaded rod, not forgetting the M3 locknuts. Adjust the lengths very carefully so that there is no buzzing or humming from the servos at idle, or at full throw.
  • Page 23 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Wings Finished in 3 hours Like the stabs, the wings are 95% finished at the factory, and have already been installed on your fuselage to check the alignment. Slide the wings onto the wing tube and check for a perfect fit.
  • Page 24 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Assemble the servo mounts from the 3 CNC milled plywood parts supplied for each servo, using CA. Fix the servos into the mounts with the 2.8mm Ø screws provided in the kit, and place them on the hatch covers to check the alignment...
  • Page 25 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Engine and Exhaust Installation Finished in 4-5 hours We strongly recommend that you complete the motor and exhaust installation before the fuel tank base and rudder servo plate are permanently installed. In the prototype we used a a Desert Aircraft DA-100 and a...
  • Page 26 These slots should be about 35mm (1.5”) wide and 125mm (5”) long, and it is best if you make nice rounded corners to reduce any chance of tearing in the composite skin. Note: Please call your Composite-ARF Rep. or email us at: techsupport@composite-arf.com, if you need any additional help with the motor and mini-pipe installation.
  • Page 27 Composite-ARF Extra 330L (2.6m span) techsupport@composite-arf.com Fuel Tank Base, Rudder Servo Finished in 1.5 hours Plate and Throttle servo mount The rudder servo plate, fuel tank base and throttle servo mount are assembled from a combination of CNC milled plywood and/or composite-balsa parts that have been lam- inated both sides with glasscloth, and vacuum-bagged, at the factory.
  • Page 28 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com aligned centrally on the cockpit floor. Once happy, rough the (below) 3 photos of the tank base gluing surfaces up properly with coarse sandpaper, clean with alcohol and glue in place with slow epoxy (min. 30 minute) and milled fibre mixture.
  • Page 29 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com R/C & Gear Installation Finished in 3 - 6 hours Everyone has their own favourite methods when fitting the R/C and gear, so the installa- tion shown here is a guide, and has worked perfectly in all of our planes flown by C-ARF factory staff, and many of our customers.
  • Page 30 These powerswitches are available as options from C-ARF, please see our website for current details. Composite-ARF advise you to keep all the cables between the motor ignition battery, ignition switch, and high voltage ignition unit as far away as possible from the receiver and...
  • Page 31 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Servo extension leads etc. Please make sure that you use good quality extension leads, of heavy gauge wire with gold-contact connectors, to all the servos. Certainly we recommend that all servo leads and extensions longer than about 30cms (12”) are fitted with ceramic chokes (ferrite rings) to prevent RF noise, at the receiver end - normally within 100mm (4”) of the receiv-...
  • Page 32 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com (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. It is totally gasoline and kerosene-proof, and does not go hard and crack with age.

  • Page 33: Centre Of Gravity

    0.5° - 1° degree and right thrust 1 - 1.5° degrees, depending on the prop used. The Composite-ARF Yak-55 SP really only needs this small amount of side and downthrust with the DA-100 and recommended propeller.
  • Page 34 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com both sides. This is the perfect throw for nice high rate: maximum and crisp snaps. If you like you can add about low rate: 125mm 20% exponential to the low rate setting as well.
  • Page 35 We hope that you enjoyed building your Yak-55SP. This manual is one of the first of a new stan- dard of Composite-ARF instructions, and we would like to complete all our products with this style in the future. Please let us know whether you like this all new instruction manual, and if you have any ideas to improve it ? Also let us know, if you think that any hardware is missing or inadequate.

  • Page 36: Packing List

    Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Appendix Yak-55 SP, 2.6m Kit Packing List Main Items Art.-Nr. Quantity Description English Fuselage Right wing Left wing Right stabiliser Left stabiliser Right elevator Left elevator Rudder Cowling Canopy Frame Right wheel pant Left wheel pant...
  • Page 37 Composite-ARF Yak-55 SP (2.6m span) techsupport@composite-arf.com Wing Pack (2 Sets) Hardware Art.-Nr. Quantity Description English Sheet metal screws 2.9 x 13mm All Thread M3 x 70mm Nut M3 Spring steel clevises M3 Plastic nut M6 Sheet metal screw 2.2 x 9.5mm...

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