Mig-15 EDF Model

High performance fibreglasss jet

Warning!

This model is not a toy. Please read this manual carefully before construction and operation of this model.

Specifications:

Wingspan: 1125mm Length: 1110mm

Rotor Diamater: 90mm

Equipment required (not included):

l 5 channel radio and reciever l Suitable motor and speed controller l Servo extension wires l Micro servos x8 l Epoxy (5 and 30min) and CA glue l Velcro l Drill or dremel, 2mm and 10mm bits l Small screwdrivers and allen (hex) keys l Craft knife l Sandpaper

Step 1: Rudder servo The correct location for the rudder servo is shown below:

Begin by attaching a servo horn and an extension wire of adequate length (between 70cm and 1m) to the rudder servo. Make sure the servos are centered (use your radio) before attaching the servo horns as this will be difficult to rectify later! Next, test fit the servo in its slot (note, servo thickness must be less than 15mm). To attach, first roughen the farside of the servo using sandpaper and glue in place using 5 minute epoxy. Next, locate the servo door covers. You can see how these are installed in the image above. You will need to cut out a small slot in the covering film using a craft knife to complete the instillation. This must accommodate the full range of servo motion so be sure to allow for this. Attach the servo cover to the vertical stabilizer using screws or 5 min epoxy. Finally, feed the servo extension wire through the plane to the nose. Step 2: Rudder hinge, control horn and clevises The aircraft is supplied with the rudder attached to the tail surface, however it is not glued in place. To attach it securely, first remove the rudder and hinges from the plane. Use a small drop of CA glue to secure each hinge to the rudder, making sure appx. half of each hinge remains exposed. Next, drop a small drop of CA on the very tip of each hinge and slide it into place. The control horns are attached to the rudder using screws. First, find a control horn and line it up with the servo horn. Drill four small pilot holes using a 2mm bit and secure with screws.

Rudder servo

Note the correct position and orientation of the servo horns is shown below.

Finally, install a push rod and clevis between the servo and rudder control horns to complete this step. The pushrod may have to be cut to the desired length. Take care when cutting these. Step 3: Elevator servos Due to the shape of the aircraft’s tail, two servos must be used to control the elevators, as you can see on the next page. Begin by attaching servo horns (as before) and extension wires of adequate length to each servo (again, between 70cm and 1m). Next, position each servo as shown in the following image, making sure that they fit as required. These servos will need to be glued in place. Roughen the surface of each servo with sandpaper and glue in the correct position (as before, 5 minute epoxy may be used).

Next, locate the servo door covers. These will be attached like so:

Before they can be installed, cut out a small slot as before. Again, note that the full range of the servo must be accommodated. Attach using screws or 5 min epoxy. Step 4: Installing the horizontal stabilizer. Both tail surfaces will be attached using epoxy. To ensure the strongest possible bond, roughen the surface to which the wings will be attached using sandpaper. Next, locate the short (125 mm) carbon fibre rod, and locator pins and install without gluing (refer to the image on the next page).

Next, install both tail surfaces. Do not glue them at this point, simply line them up. Ensure that they are the correct orientation (red side up in this case) and that they are in line with one another. It is reccommended to remove the elevator surfaces at this point to prevent them being glued. Apply glue and tape or clamp both surfaces and support using blocks if necessary. Use 30 minute epoxy (or longer) to ensure a good bond. Step 5: Elevator hinge, control horns and clevises Once the glue from the previous step has dried, install the elevators, hinges and horns. To attach the elevator control surfaces to the horizontal stabilizer and the control horns to the elevators, repeat the same procedure used with the rudder. Affix using screws as before. Finally, attach pushrods and clevises.

Locator pin

CF rod

Step 6: Installing aileron and flap servos First, centre servos, install servo horns and attach servo extension wires (30cm for flaps, 50cm for ailerons). The procedure for installing both aileron and flap servos into the wings is slightly different than before so care must be paid. First locate the four gray servo covers and as before, cut a slot in the covering film in each. Note, as each wing is a mirror image of the other these will not all be identical. Cut as shown below:

Next, attach a servo to the underside of each of these, once more noting the full range of the servos. This may be done with 5 minute epoxy, or by gluing two small blocks (provided) to the underside of these covers and screwing the servos to these (see following image).

Next, take the two main wings and find the servo bays. These are covered over in the factory so this covering film will need to be removed. Cut away with a craft knife as shown below.

Next, take the two aileron servos and covers, and feed the extension wires through the slot between the aileron and flap compartments. Make sure you are choosing the correct servo and cover to install, refer to the next image or guidance. This may prove tricky and some sort of wire will be helpful. These can now be attached securely to the wing. This should be done using four screws as shown below. Make sure you drill small pilot holes using the 2mm bit before you attach, to prevent the wood splitting.

Next, take a flap servo and cover, again making sure it is for the correct side (note, for each wing, it should be identical to the aileron servo and cover just installed). Pull both the aileron and flap servo wires through the styrofoam and through the hole in the wing provided. Then, attach the flap servo using the same procedure.

Step 7: Control surface, horn and clevis attachment Control surfaces and horns should be attached exactly as before. Use CA glue to hold the surfaces in place and screws for the control horns. Don’t forget to line up the control horns with the servos just installed and to drill 2mm pilot holes for the screws before attachment! Finish off by installing clevises and pushrods.

Step 8: Main wing attachment

As with the tail surfaces, the main wings are to be attached using 30 minute epoxy. First, roughen the fuselage where the wings are to be attached as above. Next, drill a

hole in the fuselage that will allow the servo wires to pass through freely. (Hint, distance between edge of fibreglass spar and centre of hole is 35mm. Also, a 10mm hole should be adequate). Next, locate the two fibreglass spars and four locator pins, identical to those used for the tail and slide them into position.

Finally, slide on the wings and feed servo wires through the holes just drilled. Again, do not glue at this point, simply make sure that everything fits together as planned. Ensure that the surface of the wing and fuselage come into contact. If they do not, the fibreglass spar may need to be shortened by a few mm. After you have acquired the correct position, you may apply glue and tape or clamp both surfaces in position. Step 9: EDF instillation Before the EDF can be installed, assemble the fan and motor securely. Check that there are no excessive vibrations when the motor is run. Also, to simplify the later seps of construction, make sure that the motor is orientated in the EDF unit as shown below.

Provided in you kit are four 25x15x10mm balsa blocks. Begin the installation procedure by attaching two of these as shown below to the EDF housing.

Drill first and attach with screws. Repeat for both sides.

Next, apply 30 minute epoxy to the faces of the blocks and install as shown below. It may be a good idea to test fit this arrangement before gluing. Note: do not glue the plastic housing to anything, at least not at this point!

Before allowing the glue to set, make sure that the fan is orientated such that its line

of thrust is exactly in line with the body of the aircraft. “Down and right” thrust does not apply when the motor is positioned near the CG of the aircraft! After this glue has fully set, remove the four screws and the EDF unit. Attach the remaining two blocks as shown in the image below using 30 minute epoxy.

Reattach the EDF to complete this step. Step 10: Exit duct To allow for undisturbed airflow within the aircraft, a fiberglass sheet has been provided, from which you can fabricate an exit duct. Cut out the following shape:

Roll up this sheet and install in the aircraft as below.

You can use strong tape to hold the shroud in position at this end.

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If you measured correctly, there should be a little bit of shroud exposed at the rear of the aircraft. Glue this to the fuselage using 5 minute epoxy or perhaps strong CA and trim.

Step 11: Main wing landing gear If you intend to use the provided non-retractable landing gear, first begin by cutting out the correct shape from the covering film in the main wing as shown below.

Next, install the metal struts in the fixed landing gear attachment. These are generally attached in such a manner that the bar to which the wheels will slide onto points inwards, towards the fuselage. Glue with 30 minute epoxy. Once this is dry you may attach this arrangement to the wing using screws. Once more, don’t forget to pre-drill pilot holes. Also attach wheels to the metal struts using the collars provided, with one collar either side of each wheel.

Step 12: Nose landing gear Locate the parts required for the nose landing gear (see below) and arrange them as shown. Glue the two pieces of wood together using CA.

Install this arrangement in the nose of the aircraft using screws. Also install a servo, pushrods and clevises as shown below.

Step 13: Battery and electronics instillation. First, glue the wooden plate in position as shown below:

Batteries and electronics should be placed in this location. These should be secured using velcro. Step 14: CG adjustment Position the battery such that the CG is within 5mm of the position shown below.

145.9mm

Step 15: Finishing touches Finally, install the entry duct “splitter” for realistic Mig-15 looks and go flying!

l Assistance from experienced pilot is necessary for beginners. l Pre-flight adjustment and trimming must be done before flying. Check all

linkages, nuts, servo horns, linkage nuts and screws are tightened. Make sure thread lockers are applied.

l Ensure the flying field is spacious and safe to fly. l Bench test the electronic equipment on load for 5 minutes. Check the

temperature of the ESC, BEC and battery. This is to ensure the power system and the BEC are reliable and compatable. All EDF should be run in to test for vibrations and loose shaft.

l Check all electronic equipment. Range check the radio equipment. Test all control surface are moving in their assigned directions.

l Check battery voltage before use, even the battery are recently charged. l At the first flight, it is prudent to check the C.G. l In runway takeoff, slight finger pressure at the trailing edge of the elevator

should be able to pitch up the aircraft.

Attention!