Micron Wings Minimum RC F8F Rare Bear User manual

Minimum RC F8F Rare Bear
(MicronWings Version)
Specifications
Wingspan: 36cm
Flying Weight: 30 grams (with battery)
Channels: 4
Suggested Receiver: 4Ch Micro
Motor: 7mm Brushed Direct Drive
Airframe Kit
(Included Contents)
* Airframe Parts Sheets (Depron)
* Airframe Bracing Parts (Plywood)
* Motor and Propeller
* Control Linkages + Pushrods
* Sandpaper Sheet
* Decal Stickers
Needed to Complete
* Micro Receiver with 2A ESC
* Three Micro Servos (5320 Servos)
* Transmitter and Battery Charger
* Battery (DualSky 150mah 1S)
* Soldering Iron with Fine Tip
* Epoxy Glue
* UHU Por Expanded Polystyrene Glue
* Hobby Knife
* Blenderm Hinge Tape (Link)
* Modelling Tape - Optional (Product Link)
* Ruler (metal preferred)
* Fine tip scissors
* Tweezers
MicronWings sells this deluxe version of the F8F Rare Bear
under license from the manufacturer, Minimum RC. The
MicronWings Deluxe Version features an airframe cut from
3mm Depron as well as improved design features and the
addition of ailerons to make this a true 4 channel model.
The Rare Bear is small enough to be flown indoors (sports
stadium area) by an experienced RC pilot and is also
capable of being flown outside on a calm day. With a direct
drive 7mm x 20mm brushed motor, this model has the
power and speed to perform basic aerobatics such as rolls
and loops.

Included Parts - Your kit includes the following parts.
Depron parts sheets,
Carbon rods, control linkages, motor and propeller
Decal Stickers

Before You Start
This Minimum RC plane is supplied in kit form and needs to be built. You will need intermediate
level model building skills to complete this kit. You may also require micro soldering skills to solder
the battery leads and motor leads to your chosen receiver.
Receivers , Servos and Battery
You may choose to fit any micro receiver and servos you wish in this kit. However, the kit has
been specifically designed for any of the following receivers and servos.
4ch DSMX/2 Rx with 2A ES 4ch FRSky Rx with 2A ESC Nano-Tech 160Mah Battery
Servo 5320 Black HK5320 Servo Servo 5320 Black SH
Control System Configuration
You will need a transmitter which has the capability to change servo direction. Most modern
transmitters have this function in a menu on the transmitter.
Glues
This kit requires foam glue and Epoxy glue.
* Use foam glue for all foam parts together.
* Use Epoxy glue for gluing the motor in place. Epoxy glue is required for this as the motor
becomes hot and Epoxy glue will withstand heat better than foam glue.
Recommended Foam Glue –UHU Por Expanded Polystyrene
This is the recommended
battery. DualSky brand or
similar generic brand –30 to
40C. Australian customers
can purchase these from
MicronWings

Build Instructions
Cut the parts from the Depron sheets and cut out
any pieces from the airframe which need to be
removed such as the circle holes, receiver and
battery bay cutouts and so on.
The following control surfaces need to have a bevel
cut into one edge.
* Ailerons
* Elevator
* Rudder
To do this, place a metal ruler on top of the foam
surface and align with the edge to be trimmed. Use
a hobby knife with a new blade and angle it at 30
degrees to cut back under the ruler and cut the
bevel out of the control surface. Do this on both the
control surface and where it connects to the airframe.
Note that the control surfaces should be cut so the
control horn slot is on the left side for the elevator
and the right hand side for the rudder.
Make note of which side is left and right.
The left side has a cut-out for a receiver.
The right side has a cut out for a battery.
Glue the servo mount in place in the middle fuselage
piece.
Right hand side
Left hand side

At this time connect up all your electronics and
check everything works properly. Check all your
trims and mixing on you transmitter are set these to
neutral.
Glue the left hand side in place.
Spread the glue out well and at first just gently lay
the left hand side sheet on the middle piece. This
will allow you to move it slightly to position it
correctly before pressing it firmly to set it in place.
Align the two pieces by the front of the nose cone
and the servo mount hole.
Glue the right hand side in place as well and allow to
dry.
Glue the aileron servo in place centering it in the
fuselage. Make sure the lead comes out the left hand
side of the airframe.
Sand the edges of the following parts to round them
* Don’t sand the edges with bevel cuts
Elevator leading edge
Elevator control surface trailing edge
Rudder leading edge
Rudder control surface trailing edge
Aileron control surfaces trailing edges
Leading and trailing edges and tips of the wings.

Use Blenderm hinge tape to attach all the control
surfaces –rudder, elevator and ailerons.
For the rudder, only apply hinge tape to the top and
bottom of the surface. Later a sticker will be
attached which will also act as a hinge.
Glue the horizontal stabilizer in place.
Use some Depron off-cuts to
further support the surface.
Check the surface is level
and allow to dry.
Glue the motor in place. Set it so the wires are
horizontal and exiting either side. The wire which
comes out the right hand side of the fuselage goes
through the hole just behind the motor and across to
the left hand side of the fuselage.
Both wires then run down in the gap to near the
receiver bay. Add some glue to hold them in the gap
and allow to dry.
Also glue in place the wing support. Centre it in the
foam fuselage and make sure it is level.
Tape the ailerons in place with hinge tape.

At this stage you should attach the fuselage stickers.
It is easier to attach them now before the radio gear
is mounted.
Note that the stickers add 2.9 grams to the weight of
the aircraft. It will fly just fine with the stickers
attached, but you may choose to decorate with felt
markers instead.
Holding the airframe up to the light allows you to
see where the battery bay and receiver bay is. Cut
the stickers from around these areas.
Also cut out at this point to allow the aileron servo
arm to pivot.
This thin strip goes on top and bottom of the
fuselage.
You may want to sand the fuselage edge flat first.
Left hand side
suggested sticker arrangement.

Cut the motor wires so they are 60mm from the
fuselage and then solder them to your receiver.
If using the recommended receiver from
MicronWings, confirm the motor wire arrangement
shown in this image. The black motor wire is closest
to the edge of the receiver and the white wire is on
the inner side of the receiver.
Also solder your battery connector as shown here.
Use the double sided tape supplied and cut a piece
this size and attach it to the receiver. Then secure
the receiver to the airframe.
Next glue the left wing in place. Bend the foam
about 40 degrees till it cracks along the half cut line.
We suggest using Epoxy glue where the wing
attaches to the wooden wing support.
Right hand side
suggested sticker arrangement.

Insert the carbon wing brace (the longest piece of
carbon rod in the kit), through the fuselage where
the V shape half cut is.
Glue it into the gap in the wing using foam glue and
wipe off any excess glue. Set the carbon rod so it is
5mm from the wing tip.
Attach the right wing in the same way. To attach this
wing you will need to slide the wing in-between the
wooden wing support and the carbon rod.
Work the wing into place slowly and carefully.
Then glue the carbon rod into the gap in the wing as
before. Check the wings are straight and level and
leave to dry completely.
Cut the stickers and attach to the wings after the
wings have fully dried.
Because the wings have been sanded on the edges
you will need to cut 2mm off the sticker.
Suggested wing sticker arrangement.

Glue in place all the control horns.
Note that the elevator horn is glued to the
under side of the surface.
Mount the elevator servo.
The servo arm is on the left hand side of the
fuselage and faces down as shown here. Bring the
servo wire through to the left side of the airframe as
well.
Use some blu-tack to hold the screw to the screw
driver if it gets attracted to the motor magnet of the
servo.
Flatten the servo wire so it lays flat on top of the
servo case and tape it to the wing to hold it in place
while you insert the next servo.
The servo wire should exit toward the back as shown
here.
Insert the other servo from the right hand side and
screw it in place.
You should have three servo wires all exiting the left
hand side of the airframe.

Flatten the servo wires against the fuselage and tape
them down with some hinge tape. The wires run
down through the hole in the wing.
Plug in the servos.
You may need to use a pair of tweezers to connect
the rudder servo plug to the receiver at the front.
Then coil and bundle the servo wires neatly under
the wing. Use some hinge tape to secure the wire
bundle in place.
Connect the battery and ensure all the servos are
centered and all trims are set to neutral before
proceeding.
Also at this time check the direction of the servos
and if any need to be reversed, do it now before
attaching the control linkages.
Use some modelling or masking tape on the control
surfaces to ensure they are held straight while you
connect the control linkages.
Connect your control linkages using the heat shrink
provided. The 4 shaped clips attach to the ends of
the carbon rods at the servo end.
The linkages with a U shape in them attach to the
control horns.
We suggest using just a small amount of UHU glue
under the heat shrink for a more secure connection
when the heat shrink is shrunk.

Check that all your control surfaces are moving in
the correct direction and that there is no excessive
movement. If there is, adjust the servo travel on
your transmitter.
MicronWings recommends the following maximum control surface deflections.
Use the programming options on your transmitter to limit the maximum travel amounts.

Overview Video
A quick look at the airframe and it’s features.

Flight Video
A flight in the local park.
Copyright © MicronWings 2018: All rights reserved.
This manual is for personal use only. No unauthorized copying or digital distributing permitted
without permission from MicronWings.