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Composite-ARF Yak-55 SP

(2.6m span)

Sheet 3

P41

P43

P38

P42

P40

P39

P37

P36

P35

P34

P33

VERSION 1.0

Mike C (16 July 2004)

Mac

C of G: At the back edge of

the wing spar tube.

CENTRE of GRAVITY

ELEVATOR THROWS

high rate: maximum

low rate: 40mm

high rate: maximum

RUDDER THROWS

high rate: maximum

low rate: 125mm

high rate: maximum

AILERON THROWS

low rate: 45mm down

high rate: maximum

low rate: 40mm up

Содержание Composite-ARF Yak-55 SP

Страница 1: ...techsupport composite arf com Composite ARF Yak 55 SP 2 6m span Instruction Manual Composite ARF Yak 55 SP 2 6m TAVS Technology version 1 0 ...

Страница 2: ...Composite ARF Yak 55 SP 2 6m span Sheet 1 P15 P14 P13 P9 P12 P10 P11 P8 P7 P6 P5 P4 P3 P2 P1 P16 VERSION 1 0 Mike C 16 July 2004 Mac ...

Страница 3: ...Composite ARF Yak 55 SP 2 6m span Sheet 2 P31 P30 P29 P25 P28 P26 P27 P24 P23 P22 P21 P20 P19 P18 P17 P32 VERSION 1 0 Mike C 16 July 2004 Mac ...

Страница 4: ...04 Mac C of G At the back edge of the wing spar tube CENTRE of GRAVITY ELEVATOR THROWS high rate maximum low rate 40mm low rate 40mm high rate maximum RUDDER THROWS high rate maximum low rate 125mm low rate 125mm high rate maximum AILERON THROWS low rate 45mm down high rate maximum high rate maximum low rate 40mm up ...

Страница 5: ...s 1 Show you how to build your aircraft accurately and properly 2 To explain about your fully composite aircraft and how to handle and maintain it 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 on...

Страница 6: ... the instructions contained in this instruction manual regarding the construction operation and maintenance of the aircraft nor whether you install and use the radio control system correctly For this reason we at Composite ARF are unable to guarantee or provide a contractual agreement with any individual or company that the model you have made will function correctly and safely You as operator of ...

Страница 7: ...heck your complete R C installation first WITHOUT the engine running Leave the transmitter antenna retracted and check the distance you can walk before fail safe occurs Then start up the engine run it at about half throttle and repeat this range check with the engine running Make sure that there is no range reduction before fail safe occurs Only then make the 1st flight If you feel that the range ...

Страница 8: ...re the aileron slides under the main wing skin during down throw This hinge setup is the cleanest you can ever obtain but you have to take some care during assembly for proper installation and servo set up First the hinge line is on the top surface of the wing not in the centre This is NOT a disadvan tage if you set in about 10 NEGATIVE aileron differential in your transmitter program This means t...

Страница 9: ...made in negative moulds and it is all constructed using TAVS technology All the loadbearing internal parts are glued in during manufacture to ensure accurate location and reduce the assembly time for you The sleeve in the fuselage that takes the main wing spar tube the stab spar tubes and the holes and reinforcement plates for the anti rotation dowels are already installed There is no need to even...

Страница 10: ...ame time Always keep in mind that these contest air planes 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 Always handle your air plane with great care especially on the ground and during transport so you will have many hours of pleasure with it Compos...

Страница 11: ...ted in the moulds you can save a lot of weight At least 2 lbs and that is definitely worth saving A negative paint job is very compli cated to make The painter never sees the result of his job He cannot see the design growing and devel oping he is painting blind He even cannot see little mistakes and flaws and even if he COULD he could not correct them The maxi mum time to apply a designer paint s...

Страница 12: ...ake sure that these stripes line up perfectly Sometimes it is necessary to do that and it is definitely not a quality problem or a flaw It comes back to what is possible and what is impossible If you want to have a really perfect paint job then you might decide to have a sin gle colour version and have it painted by yourself or your friend But don t forget Consider the additional cost consid er th...

Страница 13: ...or cleaning joints before gluing Adhesives Not all types of glues are suited to working with composite parts Here is a selection of what we normally use and what we can truly recommend Please don t use inferior quality glues you will end up with an inferior quality plane that is not so strong or safe 1 CA Glue Thin and Thick types We recommend ZAP as this is a very high quality 2 ZAP O or PlastiZA...

Страница 14: ...Mini Pipe or Tuned pipe set Incls 2 canisters pipes 2 aluminium or stainless steel headers 2 Teflon couplers 4 spring clamps mounting hardware Available from C ARF 7 Standard exhaust muffler optional if noise is not a problem at your field 8 High quality heavy duty servo extension cables with gold connectors High quality receiver and ignition switches Y leads ceramic ferrite chokes etc 9 Receiver ...

Страница 15: ...he first thing to do is protect the finished paint on the outside of the model from scratches and dents during building so cover your work table with a piece of soft carpet cloth or bubble plas tic The best way to stop small spots of glue getting stuck to the outside of the fuselage is to give the whole model 2 good coats of clear car wax first but of course you must be sure to remove this 100 pro...

Страница 16: ...e 14 When satisfied with the angle temporarily tack the wheelpants to the carbon landing gear legs with a small drop of thin CA Remove the wheels and axle bolts and then secure the wheelpants to the legs with 2 small sheet metal screws 2 2 x 10mm into 1 8mm Ø holes drilled into the ends of the carbon legs You can use any 5 main wheels of your choice Kavan wheels are very lightweight but not very d...

Страница 17: ... into the front edge of the fuselage If necessary sand the inside back edge of the cowl slightly and the moulded in groove in the fuselage to get a perfectly flush fit Mark a centreline on the top of the cowl and the fuselage on small pieces of masking tape File a small slot in the top centre of the fuselage lip as shown here to take the loca tion tab on the milled plywood part that will be glued ...

Страница 18: ...er clamps supplied as shown in the photo This system makes it very quick and easy to remove the cowl ing for motor or exhaust system access if needed and has been proven with many hundreds of our Yak 55 s The 6 vacuum formed grilles louvres for the cowling come pre painted in a single colour and trimmed approx to size from the factory However you need to cut out the vertical face behind each angle...

Страница 19: ...de 1 5mm wider towards the centre of the fuselage Then mill the 2 middle slots in the fuselage also but only 3mm wide so that the 20mm square plywood parts are a sliding fit in the slots Now glue 4 of the 20mm square milled plywood pieces to the inside of the fuselage directly below the front and back 4 slots making sure that the inner faces are exactly verti cal Because of the shape of the fusela...

Страница 20: ...refully you can take off the canopy frame in about 1 hour Fitting the clear canopy into the frame is a little bit tricky but this is a step by step guide of how to do it successfully Sand the inside edges of the canopy frame carefully with rough sandpaper to ensure a perfect fit of the canopy inside Lay the canopy on top of the frame and mark the rough shape with a felt pen or wax crayon Cut the o...

Страница 21: ...ints used for painting the inside of polycarbonate car bodies eg the Tamiya or Lexanit ranges Use many very light coats to get even coverage Finally the 4 holes for the heads of the M3 bolts that hold the canopy frame in place need to be counterbored into the outside surface of the fuselage so that the boltheads do not squash the relatively soft foam cored vacuum moulding Counterboring means makin...

Страница 22: ... impor tant that they line up with the output arm on the servo so that there is no twisting moment Trial fit one horn in the milled slot so that the hole for the clevise is between 22 24mm from the bottom surface of the elevator and exactly perpendicular to the hinge axis the centre of the aluminium hinge tube Adjust slots as needed Put a layer of clear tape over the area of the milled slot wax it...

Страница 23: ...Finally remove them from the servo and secure the phenolic arms to the standard plastic arms with at least 2 of the very small 2 2mm Ø x10 sheet metal screws provided in the kit Make up the linkages from the 80mm long M3 threaded rods with 2 quicklinks and 2 x M3 locknuts for each stab Don t for get to Loctite the quick link and lock nut on one end of each linkage Do NOT use ball links on the serv...

Страница 24: ...the bottom surface of the 2 phenolic rudder servo arms to ensure good glue adhesion Then fit the plastic output discs to the servos and connect the servos to your R C to centre both servos Note If you use the larger 35mm Ø plastic servo output discs you will need to notch them to clear the nuts that secure the ball links as shown in the photo here With the R C still switched ON place the C ARF rud...

Страница 25: ...cable through the supplied crimping tubes 2 times before squashing flat with pliers see photo Make sure that the wires are tight and check and adjust after the first few flights as the cables straighten out Even a small amount of slop will prevent your Yak from perfect tracking Servo choice The rudder is a huge surface on the Yak 55 SP and just like the elevators the choice of servo is up to you W...

Страница 26: ...the photos used to explain the aileron horn templates actually show the wing of our 2 6m Extra 330L not the Yak but the method is exactly the same Make a horn alignment template from thin scrap plywood as shown to check that the distances from the quick link hole to the hinge axis are exactly the same Because of the difference between the inner and outer horns the easiest way to do this is to make...

Страница 27: ... way as the elevator and rudder servo horns The servo covers are fixed to the underside of the wing with 4 small sheet metal screws pro vided This kind of servo mount allows changing of a servo within a few minutes if needed Finally make up the linkages from the M3 x 70mm thread ed rods supplied with 2 quicklinks and 2 x M3 locknuts for each linkage Don t forget to Loctite the quick link and lock ...

Страница 28: ...nes when the motor is mounted in the centre of the motor dome You can check the incidence of the firewall easily by setting the assembled model on a flat table and setting the wings at 0 measured with an incidence meter Then check the incidence of the firewall which should already have approx 1 downthrust and 1 5 sidethrust built into it To make sure that the centre of the spinner is in the centre...

Страница 29: ...of the fuselage and the separate compartment under the cockpit area makes it easy safe and reliable with excellent cooling This set up gives the engine a nice throttle response a perfect mid range and also increases the top end power noticeably The pair of tuned pipes with the headers teflon joiners and clamps are all available from C ARF as optional parts The support bulkhead for the tuned pipes ...

Страница 30: ...e 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 For the mini pipe installation the front of these slots should start about 25mm in front of the back end of the mini pipes as shown When cutting the slots leave about 30mm 1 25 between the slots so that you don t cut through the jointing...

Страница 31: ... and pre vent the bolt heads pulling through the composite material Unless you have a very short screwdriver you will find it easier to drill a hole through the side of the fuselage which will be covered by the wing root to access the bolt or screw holding the servo arm onto the servo shaft Make up the throttle linkage from the M3 all thread stop nut and quick links that are included in the hardwa...

Страница 32: ... slots in the tank base Assemble the parts with thin CA and then reinforce all joints with the epoxy milled fibre mixture Finally this part is glued onto the fibreglass sleeve for the main spar after roughening it up properly with slow epoxy and milled fibre checking that the slot in the vertical bulk head has located on the tab on the front of the rudder mount which keeps everything central Don t...

Страница 33: ...nt of the plane with one thin coat of 24 hr laminating epoxy or similar brushed on Be careful not to add excess weight here it only needs about 30 40 grams 1 1 2 oz of epoxy to fuel proof all the wood in the whole area in the front of the plane Simple installation For a simple installation the receiver can be fitted to the milled plywood bulkhead behind and below the rudder servos which keeps it a...

Страница 34: ...or and tuned pipe mini pipe set up you will not need any addition al ballast in the nose to obtain the correct Centre of Gravity for pattern flying For the Shulman 2000 scheme shown in these instructions the 2 Rx batteries 2000 mAH were secured with cable ties to plywood plates glued to the cock pit floor immediately in front of under the wing spar tube We also highly recommend the high quality Po...

Страница 35: ... assembling the plane Making up the proper extension cables and connectors is only a little work if you are proficient with a small soldering iron and makes assembly of the model at the airfield very quick and easy Once all wires are soldered to the gold plated pins fit a short length of heat shrink tube over each one Finally protect all the connections from vibrations etc with a nice blob of glue...

Страница 36: ...eed the motor one out of the bottom of the plane vent overflow leave open and one at the top for filling close for flight Final check Now check that you have fixed all components securely Keep in mind that all the components inside the aircraft are loaded with the same G s as the wing and the wing spar during aerobatic maneouvres Check engine cowling wing and stab mounts carefully again Are all ex...

Страница 37: ...he servo arms to the servos especially important with digital types Then you can go on set up all the linkages control throws and R C system as described below The assembly of the model should be completed in about 23 26 hours Composite ARF Yak 55 SP 2 6m span techsupport composite arf com 34 Two more views of the latest Shulman 2000 paint scheme on the C ARF Yak 55SP ...

Страница 38: ...e light wing tip to make it track correctly Engine Thrustline Already given in the instructions down thrust should initial ly be set at 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 We recommend a 2 blade 28 x10 carbon prop for any 100cc engine I...

Страница 39: ... down if you wish You may need to lengthen the slots in the servo hatches by 2mm or so at the front to obtain the maximum high rate throws In General Your Yak has very large control sur faces This makes it very sensitive and reactive It is always possible that these huge control surfaces can flutter at high speeds if the assembly servo installa tion and linkages are not made perfect ly The design ...

Страница 40: ...k solid but still sensitive contest tool in front of you which if used as it is designed will give you many hours of pleasant flights The performance of this aircraft is unlimited and if maintained regularly and carefully you will enjoy it s performance for many many hours With this aircraft you have the potential to move up to the unlimited cracks it s up to you now You can t blame it on the airc...

Страница 41: ...rass tube 3 1 x 4 x 500mm for rudder 1 Aluminum Wing tube 50 x 1 4 x 1000mm wing spar 1 Aluminum Stab tube 20 x 1 x 340mm stab spar tube 1 Hardware bag 1 Milled wood parts bag General Pack Art Nr Quantity Description English 2 Allen screw M3 x 12 mm 4 Allen screw M3 x 16 mm canopy mount 2 Washer 3 mm 6 Blind nut M3 32 Sheet metal screw 2 2 x 9 5mm 2 Allen screw M6 x 20mm 4 Allen screw M6 x 40mm en...

Страница 42: ...ware Art Nr Quantity Description English 4 Allen Screw M3 x 16mm 4 Stop nut M3 4 Washer 3mm 6 Nut M3 2 All thread M3 x 60mm 2 Spring steel clevises M3 4 Ball link M3 2 Pull Pull Cables Ø 0 8mm x 2800mm 2 Threaded ends for Pull Pull Cables Lieferbares Zubehör Available Accessories Tail gear setup with 50mm Ø wheel Desert Aircraft DA 100 motor MTW Mini pipe or Tuned pipe systems for DA 100 motor Pow...

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