iKarus Mach 3 Building Instructions

Mach 3

#160760

Norbert Grüntjens

Ikarus Modellflugsport, Inh. Norbert Grüntjens
Im Webertal 22, 78713 Schramberg-Waldm./Germany
Tel. [phone] Fax. [phone]

5/2000

Mach 3 kit contents

Mach 3 building instruction

The MACH 3 is a Slow and Park flyer that shows fantastic
flight characteristics due to its light weight. It can be flown at
extreme speeds either very slow or really fast.
Fun is guaranteed since it`s feature make aerobatics are no
problems even when there is little space.

Additional items (not
included in the set)

Motor-/Gear set
No. 160611

Battery pack No. 160607

CA glue , Epoxid glue

Knife, scissors, tongs

Micro controller (No. 160533)
Mini receiver (No. 160565)
Micro servos (No. 720367)

1

Building the fuselage

Mark the aluminium boom (acc. to the picture) in distances
of 90 mm and 275 mm from the tip of the boom for adhering
the chassis at this places later on.

Roughen the boom where the chassis is going to be affixed
to the boom and fix the chassis-wire with CA Glue.
Now wind the carbon fibre firmly around the chassis and the
boom. Afterwards moisten the material with CA Glue and let
it become hard.

Assembly

Please read the following instructions carefully before you
start to built the Mach 3.

Attention: Take your time to read the instructions for the glue
used for the construction of your new flight object:

Cyanoacrylate glue
This glue needs to be kept away from children. No contact
should be allowed for children. It works in seconds and
glues skin and eyes. After eye-contact please rinse carefully
and see a doctor immediately. Do not use with Styrofoam
parts.

UHU-Por
This is a contact type glue. Cover both surfaces meant to be
glued together as thinly as possible with the glue and leave
to try 10-60 minutes before carefully joining the surfaces
together.

9

m0

m

2 5

mm7

Tip

Wing assembly

Glue the halves of the wing together using contact glue.
Reinforce with self-adhesive tape.

Bevel the rudder about 30°. Attach the rudder as shown on
the wing using tape.

Glue the rudder reinforcement onto the interior of the
rudder.

Mark the position of the rudder horns and drill a 3 mm whole
at this point. Glue the rudder horns in connection with the
rudder horn – disk. Now the completed wing can be glued to
the fuselage stick. Check the balance by keeping an eye on
the edges of both wings.

Slide the wheel onto the
nave and both on the
chassis wire.

Then bend the wire as
close to the nave as
possible.

Tape

Glue

Tape

Wing halves

Use a sharp knife to work on the downward side of the
wings in the area of the chassis reinforcement, so that the
wings can lay smoothly on the fuselage.

Rudder

Wing

Tape

Tape

30°
bevel

Reinforcements

Fixpoint

Reinforcements

Approx.
5mm

If the Pico Servos (No. 720367) are used, there should be a
cutting in the body of 19 x 22 mm in a distance of 145 mm
from the end-ledge. In this cutting the servos need to be
integrated using glue. Use CA Glue to fix a fork-head each
on the carbon fibre sticks. Roughen the place where the glue
has to be used.

Screw the two remaining fork-heads on the solder sleeves
until the middle of the thread. Attach the fork-heads to the
horns of the rudder and adjust the rudder that the rudder
deflection points upwards 4 mm at the deepest point. If
necessary shorten the carbon-fibre sticks that they reach
into the solder-sleeves 1 cm. Use CA-Glue to attach the
sticks to the sleeves.

Forkhead (1)

Forkhead (2)

Solder sleeve

Carbon fibre sticks

145 mm

Cutting
19*22mm

2

Approx
4mm

Work on

Drill an opening for the fixation stick of the fuselage with a 3
mm borer. Attach this at a 90 degree angle by using glue.
Depending on what kind of battery is intended to be used, cut
an opening for the cable-binder that is thought to affix the
battery.

Inserting the engine

Slide the engine-socle onto the fuselage stick that was
roughened and glue it with CA-glue. The axis of the engine
should be in a 2° angle downwards which is predetermined
by using the Ikarus Engine Set (No. 160611). Please
connect the Engine Micro Speed Controler 2000.

Cut the body and the cabin cover with scissors and a knife
along the marked lines. Smooth the edges afterwards for

using fine sandpaper. Please leave some room for this
when cutting along the lines.

230mm from the stern, make a 5 mm boring. Insert the
rubber cover here, fix the fuselage here. Glue the side
rudder on the fuselage as marked on the body of the plane.
At the end glue the cabin cover and decorate the model
according to the picture on the cardboard. The rivets and tin
decoration are made by using an inkpen.

m

2

3

0 m

Rubber cover

2°

Mark the centre of gravity and hold the model at this point
on a fingertip. It should be horizontal now. If this is not the
case, use the batteries to balance until the correct horizontal
position is achieved.

3

175mm

Pre-flight checks

Now switch on the transmitter, and switch the gear stick to
low throttle position. Switch the flight battery on.

Now test the rudder and the mixture, a delta mixer is
necessary. (check the manual of your transmitter)

Now pose yourself behind the model and test the altitude
rudder. Both rudders should move upwards. If you test the
direction and give right, the right rudder should move
upwards whereas the left rudder should point downwards.

Control the angle of the rudder movement. 15mm deflection
are a good result.

All RC-components need to be fully tested before trying the
first practice flight. Especially the reach of the components is
of importance. Test this by switching on the transmitter, then
the batteries and then move 30 m away from the model with
inserted transmitter antenna. There should be no
malfunction. If this is not the case, check for the cause of the
irritation. Are the batteries recharged? Are the right quartz in
the receiver and transmitter?

The first start can be tried from hand or an even ground. Do
not use the steering extensively since the model reacts with
sensitivity.

4