Micron Wings Depron Bug Airframe Kit V2 Manual

Depron Bug Airframe Kit –V2
(Build Instructions)
Your kit contains the following components
Fittings: Carbon rods, undercarriage, wheels, control linkages, screws, motor and gearbox, propeller.
Pre-cut airframe parts (2 sheets)
Features
Wingspan: 370mm
Length: 35cm
Flying Weight: 25grams
Channels: 3 (Throttle, Elevator and Rudder)
Suggested Receiver: 3 Ch Brick
Motor: 7mm Geardrive with 140mm prop
Kit Contents
* 3mm Depron Airframe –pre cut
* Fittings (Bracing, undercarriage, control linkages)
* 7 mm Geardrive
* 140mm propeller
Needed to Complete
* Receiver and Transmitter
* Battery and charger
* Glue, hinge tape and basic workshop tools

All the parts are pre-cut and some tabs have
been left in to hold the parts in the sheets.
Using a hobby knife, carefully cut through the
tabs to remove the parts.
First, insert the front part of the wing support
through the slot in the horizontal fuselage section
Slide the horizontal fuselage section over the
front of the wing support and push it back into
the crevasse as far as it to go.
For the moment just allow the horizontal
fuselage section to run alongside the fin like this.

Then push the back part of the horizontal
fuselage section down over the rear part of the
wing support.
Slide the whole horizontal fuselage section
forward as far as it will go.
Then lift up the rear part of the horizontal
fuselage section and slot it down over the fin and
work it down gently.
Work the whole horizontal fuselage section
backward bit by bit until the rear slot fits neatly
into the slot in the fin.
Glue the horizontal fuselage section in place with
UHU Expanded Polystyrene Glue or other foam
safe glue.
(Product Link)
Next take the wing parts and sand the upper
surface of both around the edge to form a
smooth rounded leading and trailing edge.

Insert the wings carefully, bit by bit into the wing
shapers until they protrude about 2 cm.
Optional Step:
You can now insert the wings (with the shapers
still on) into hot water to form the Depron to the
shape of the curves.
Briefly sand the inner parts which will be joined
at about 10 degrees before gluing them so they
fit together flush.
Glue the wings with the shapers in place and
allow the glue to dry before removing the
shapers.
The completed wing should have dihedral and
curvature.

The tailplane attached. Remember to also glue
the tailplane to the horizontal fuselage section
for added strength.
Both the tailplane and vertical stabiliser control
surfaces are attached by a small section. Cut
through this section to remove the control
surfaces.
These control surfaces will need to be cut or
sanded at an angle as shown here to allow them
to pivot freely.
Control Surface
Tailplane
Hinge Tape
Remove the wooden parts from the sheet. Use a
hobby knife to cut around the parts to make
them easier to remove.
Glue the motor mount in place remembering the
R goes on the right hand side of the fuselage.
The motor mount holes are positioned to give a
small amount of right thrust to the motor.

Before gluing the undercarriage mount in place
screw in the three positioning screws in place
which hold the wire frame in place. Check the
undercarriage is firm.
Then glue the undercarriage in place.
Glue in place the triangular support pieces as
shown here.
Mount the motor on the motor mount with the
supplied screws.
Put the supplied spacers under the rear of the
motor mount as shown here to give the motor
down-thrust. NOTE: Spacers included in the kit
are clear plastic –not red in colour as shown in
the image here.
You may wish to solder your connector (not
supplied with kit) to the motor leads before
mounting it on the airframe.
The motor mount has pre-cut holes which
accommodate 5320 servos. If you are using a
receiver and servo setup (not included with kit)
you can screw the servos in place. Cut holes as
needed in the airframe to route the servo wires
back to the receiver.
(Product Link)
This micro receiver mounts nicely between the
servos.
(Product link)

If you are using a brick style receiver, (not
included with kit) it can be mounted directly on
top of the motor mount board.
(MicronWings Receivers Link)
Attach your control surfaces with hinge tape and
ensure there is about ½ mm gap between the
stabilizer surface and the control surface to allow
for full movement.
(Product link)
Next, glue in place the control horns and connect
up the pushrods.
Before doing this step be sure to turn on your
transmitter and receiver and centre the servo
arms and trims on the transmitter.
Also check which side your control horns need to
go on if using a brick style receiver. You may
also need to reverse direction of rudder or
elevator on your transmitter.
Attach only this control linkage to the ends of the two
control rods. Use a dab of glue to tack them in place
and cut a short length of heat shrink from the tube to
cover them with. The glue is important because when
the heat shrink is heated the glue heats up and binds
the pushrod and heat shrink together. Heat the heat
shrink with a soldering iron or something else hot.
These connectors are for the ends of the pushrods
which attach to the servos.
Example of the pushrods connected to the servos.
Attach the control linkages to the inner most hole of the
servo (if using servos). This will reduce the over travel of the
pushrod to a more appropriate amount.

Once again turn on your transmitter and check your
servos are cantered.
Use a piece of stiff masking tape or a pin to keep the
control surface level and then trim the pushrod with
plier cutters about 5mm from the control horn.
Attach the control linkage with the hoop in it, add a
little glue and heat to shrink the heat shrink to bond
the join.
Attach the control linkage to the hole further most
away from the control surface.
Be sure to check that the control surface is level.
Adjust your maximum servo travel for the rudder on
your transmitter. This image shows the maximum
amount of throw needed. You will most likely need to
dial down the maximum servo travel in the settings on
your transmitter.
Use a section of heat shrink 3mm long and heat it to
shrink it to the axel to keep the wheels on.
To attach the propeller, don’t press it onto the shaft by
holding the geardrive as this will most likely result in a
bent shaft.
Instead, lay the propeller on a bench and grip the
geardrive shaft with a pair of fine tip pliers. Press the
shaft down into the propeller.

Next glue on the wings. If using UHU Expanded
Polystyrene glue, apply a small amount to both
surfaces and allow to dry till very tacky before bringing
the two surfaces together.
Check the wings are level.
Use some modelling tape to pull the front and back
down onto the pylon where the wings attach.
Glue in place the two ribs next to the fuselage. These
will help to keep the wings level and add strength to
the mount. Again tape the ribs in place till they dry.
Put a small amount of glue onto the back of the screws
protruding through the undercarriage mount and screw
on the soft rubber tubes. This will protect from
scratched from the screw tips.
Attach the VELCRO® Brand Super Fine Dots to the
fuselage where the battery need to be attached.
This image shows the approximate position of the
battery. But this may vary depending on your receiver
choice and servo setup.

Centre of Balance.
Adjust the position of the battery so the balance point is 30mm back from the leading edge of the wing.
Finished.
Check control surfaces before flight.
You only need a slight amount of throw on the control surfaces.
In most cases you will need to dial down the throws on the control surfaces.
Do a test glide first over grass to check the balance point.
Start out with low throttle and hand launch. Try a gentle turn left and right and land ahead and adjust servo travel if
needed.
Sample Flight Video
https://youtu.be/hEfyqlDqBsc
Copyright © MicronWings 2017: All rights reserved.
This manual is for personal use only. No unauthorized copying or digital distributing permitted.
30mm