Thread: Discussion Micro3DX
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Old Nov 11, 2008, 09:24 PM
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Final Assembly

Final Assembly
Apply taped hinges to all control surfaces with 3M clear scotch tape.

Final Assembly

Apply taped hinges to all control surfaces with 3M clear Scotch tape.
The Micro3DX has 3 hatches that can be used for the rudder and elevator servos. It is a good idea to line up your servos and do a “dry run servo fit” to ensure that you know how the servos will fit and that the locations you choose allow the plane to be balanced properly.


Start out by centering your servos. Mount a single sided arm on servo. Remove grid from servo hatch that you are going to use. *Hint* you may want to remove loose labels from servo before applying the provided foam tape. Apply foam tape to servo. Tuck wire from servo into plane before placing servo in plane.

Fig 41: Position your servo. Center servo arm on servo arm slot located on the opposite side of your servo hatch. Hold servo up so tape does not stick. When servo is in position press down on servo while holding the outside wall of the fuselage to ensure you do not break the fuselage. Install second servo in the same manner.


Fit the carbon pushrods into pushrod guides before removing them from the sheet. Push the carbon back and forth to ensure it operates smoothly. Enlarging the hole may be necessary on push rod guides. If so, use a small drill bit to enlarge them. Remove elevator and rudder push rod guides from plywood sheet. Sand them smooth if so desired

Fig 42: Remove covering from four push rod guide sockets on fuselage. Cut four 1” pieces of shrink tubing.

Fig 43: Take the shorter carbon rod and put it on the left side of the aircraft (side with servo mounted closest to tail section) and install with no glue. Cut a 2 ” length of piano wire and put a small z-bend in it.

Fig 44: Assemble as shown with 1” overhang on shrink tubing. Pull back. Apply CA glue then apply heat to the shrink tubing. Repeat for other side, with longer push rod. *Note* Push rod guides are still NOT glued. Take push rods and set them aside.
Slide wing tube into wing sockets and temporarily install wings.

Use a fresh razor blade and remove covering from area where fuselage will be glued to vertical and horizontal stabs on both sides. Do not glue yet.

Fig 45: Insert vertical stab and align horizontal stab so it is square with vertical stab. Center the horizontal stab with fuselage. Measure from a point on the tip of the horizontal stab, not the elevator, to a point on the wing tip. Both sides should be equal. Make sure that the horizontal stab is square to the vertical stab and glue both in place with thin CA. Check that the horizontal stab and main wing are on parallel planes. If the fuselage is twisted, twist it in the opposite direction while removing the wrinkles in the covering with a heat gun or iron.

Fig 46: Temporarily install the elevator control horn. Slide a 1” piece of shrink tubing over the push rod. Bend a piece of wire as shown and fit it to the pushrod so the elevator is neutral and the servo centered. Glue the wire to the carbon pushrod. Remove the entire pushrod assembly from the plane and heat the shrink tubing until it is tight. Reinstall the assembly and glue all parts.

Fig 47: Install rudder pushrod using the same procedure.


Install aileron servo. Feed wire through wing. Use the provided 0 x ” screws to mount servo. *Note* Do not try to use screws provided with servo. They may be too big. Center your servo and install your servo arms with the arm pointed towards fuselage. Repeat for other wing.
Install quick-link onto aileron control horn facing fuselage side of the wing. You will need to drill a 1/16” size hole in the control horn. Make a z-bend in provided .032” piano wire. Cut wire ” past quick-link.

Fig 48: With the wing flat on table tighten the quick link screw but be careful not to over tighten it. It is aluminum and you could strip the quick link. Repeat on other wing.


Fig 49: Install the wheels using the provided wheel retainers. Insert the gear into the socket on the fuselage. Use plywood part F1A to wedge the gear in. Some sanding of F1A will be required to make it fit. Do not glue the gear in place as this will make repairs difficult.


Fabricate a tail gear from .032” piano wire. Drill a pilot hole in the front end of the tail gear slot which is in the bottom of the fuselage. (Refer to drawing on Page 13).

Fig 50: Mount the tail gear with medium CA glue.


Feed the motor leads through the bottom hole of the motor mount so that the wires run along the bottom of the battery compartment. Mount the motor to the motor mount with provided #1 ” screw. Down thrust is designed into the model. Right thrust may be added as needed. Connect the ESC route wires so they do not obstruct battery.
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Last edited by jkarpy; Jan 20, 2010 at 05:44 PM.
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