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Sukhoi SU 31—2.75m/2.6m                                                                                                                                                               Page|3

You have acquired a kit, which can be assembled into a fully working R/C model when fitted out with suitable accesso-
ries, as described in the instruction manual with the kit. 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. For this reason we are obliged to deny all liability
for loss, damage or costs which are incurred due to the incompetent or incorrect application and operation of our prod-
ucts, or which are connected with such operation in any way. Unless otherwise prescribed by binding law, the obliga-
tion of the Composite-ARF company to pay compensation is excluded, regardless of the legal argument employed.
This applies to personal injury, death, damage to buildings, loss of turnover and business, interruption of business or
other direct and indirect consequent damages. In all circumstances our total liability is limited to the amount which you
actually paid for this model.

BY OPERATING THIS MODEL YOU ASSUME FULL RESPONSIBILITY FOR YOUR ACTIONS.

It is important to understand that Composite-ARF Co., Ltd, is unable to monitor whether you follow the instructions con-
tained 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 the model, must rely upon your own expertise and judgement in acquiring and operat-
ing this model.

Personal safety:

There are a couple of things that are good to keep in mind when you are assembling your Sukhoi SU-31.  Some of
them are common sense, but it doesn t hurt to be reminded. While you are working with tools and sharp implements,
be aware of others around you and the environment you are working in. Always wear eye protection, and when work-
ing with solvents and glues, keep your area ventilated. When cutting or sanding materials, always wear a face mask to
avoid inhaling particles. Keep your work environment clean and tidy at all times. A clean workshop will enhance the
experience. Protect all parts from scratches and dents. Use rubber matting on your bench, and be careful of compo-
nents like screws getting between the part you are working on and the bench.

Assembly process:

This assembly manual is set out in an order that simplifies the process. Each step is in an order that leads into the
next. You may wish to change and do some things in a different order, which is fine provided you keep in mind that
some things need to be done before some others. When planning out the installation of your components, always keep
the centre of gravity location in mind. If you plan ahead you can avoid having to add weight to your model. It is far eas-
ier to remedy a nose heavy model than a tail heavy model. A few grams of lead at the rear is preferable to hundreds of
grams in the nose! You will find that it is easiest to fit items that cannot be relocated, like aileron and elevator servos,
before you do a preliminary C of G check. Rudder servo(s), RX and ignition batteries etc can generally be relocated to
suit your requirements.

Most of all, enjoy the process of creating your new Composite Arf Sukhoi SU-31, a job well done is always satisfying!

Things that are handy to know

Liability Exclusions

Содержание Sukhoi SU 31

Страница 1: ...Sukhoi SU 31 2 75m 2 6m Page 2 75M 2 60M Sukhoi SU 31 Assembly Manual...

Страница 2: ...show or freestyle contest As usual with our SU 31 2 75m you get an extremely well prefabricated airplane It is super strong yet light weight and well engineered for the flying stresses in competition...

Страница 3: ...l must rely upon your own expertise and judgement in acquiring and operat ing this model Personal safety There are a couple of things that are good to keep in mind when you are assembling your Sukhoi...

Страница 4: ...o arm on the rudder a 4 to 4 5 offset arm is suitable Please consider the use of a good quality throttle servo preci sion is required to maintain good throttle trim and consistent idle control A poor...

Страница 5: ...good constant idle requires a precise servo such as a JR DS8231 or a Futaba S3071HV Alloy Servo Arms SWB Secraft Hanger 9 or similar 1 5 for Elevators and aileron Phenolic rudder arm supplied Spinner...

Страница 6: ...still be done with a little due care Electric or Battery Drill Pedestal type preferred hand held Drill Bits Various sizes metric Sharp Knife X Acto or similar Measuring Steel rule s tape measure squa...

Страница 7: ...nd a 6mm nut and a 6mm Nyloc nut to secure the wheel to the leg Please note some wheels need to be drilled out to accept the 6mm axle bolt Use the washers provided to space the wheel correctly on the...

Страница 8: ...inner to cowl alignment So if you can manage try and get the required marks with the cowl full assembled but if you find it too difficult just use the bottom half but double check your marks with the...

Страница 9: ...ture or to suit your chosen engine When you are satisfied with your engine position markings drill your mounting holes Drill a 3mm pilot hole first then use a 7mm drill bit to enlarge the hole to suit...

Страница 10: ...you are passing the ignition high tension leads through the dome ensure they are protected and not resting against the cut fiberglass Rubber blanking plugs are ideal for this simply punch a hole in t...

Страница 11: ...ine dome in preparation for marking out the desired cut out area Again the area that needs to be cut out will vary dependant on your exhaust selection It s important with a dual canis ter installation...

Страница 12: ...ck them as part of your routine maintenance program replace when necessary In the parts bag supplied you will find 2 9mm x 13mm pan head sheet metal screw to mount your servos It s important that you...

Страница 13: ...25mm forward of the stab tube The servo lead needs to be protected in some way from the harshness of the fibreglass fuselage The edges of the fibreglass will quickly wear through the protective coatin...

Страница 14: ...the hatch in place and hold them there with some mask ing tape while you pre drill the holes for the hatch retaining screws Use a small drill bit 1 5 2mm to drill the holes for the hatch cover retenti...

Страница 15: ...before the silicone sets Hold in place with masking tape while everything goes off As an alternative to the plywood servo mount you could also use a JR single servo side mount 07 04 These items are p...

Страница 16: ...old one is pretty straight forward The clear canopy needs to be trimmed first Start by removing the excess material so you can fit it over the canopy frame for marking The canopy can be cut with shar...

Страница 17: ...king it A syringe is one of the easiest ways of applying the silicon between the canopy and frame A 30ml syringe has more volume than re quired but its physical size makes it easier to handle it s gre...

Страница 18: ...c arms are required to be mounted onto alloy servo discs DO NOT USE THE STD NYLON SERVO DISCS The standard discs provided with the servos may strip under heavy loads resulting in control surface flutt...

Страница 19: ...have a measurement you need to transfer that to the outside of the fuselage Place some masking tape on the fuselage roughly where your mark will be With the straightedge on the canopy seat mark a line...

Страница 20: ...enolic servo arm provided in the hardware pack you can simply loop the cable through the slot in the arm and crimp If you elect to use an alloy arm you can repeat the same process as you have already...

Страница 21: ...e C of G is located The carbon rods will need to be cut down to suit ours came in at 282mm and 276mm However this measurement may vary from model to model so please take a cor rect measurement to meet...

Страница 22: ...surface Use some card to get the basic shape you require and then trace the shape onto the balsa The thin ply can be easily cut with scissors and the final shape trimmed with a sanding block We used...

Страница 23: ...0mm more down at full rates Although at full rates the roll rate will be blistering as you move into low or mid rates the preset differential will become more evident Obviously you can use your transm...

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