Construction / tuning

So, finally after more then 5 months in the box I managed to get started
on this plane.

First, as with all free flying planes, you need to assemble the plane and
fly the plane. If it flies well, mark the balance point under the wings

Next I took my time to get started on the
elevator wing! This time I tried
to install a full elevator wing tail. See pictures for more information....

Cut the left & right elevator
wing from the middle
Carve a trench with a hot
soldering pen.
Insert a small tube in the
middle section - do not glue
it yet.
Cut a CFK rod that fits to the
little center tube the full
length from tip to tip.
Now align all perfectly on
a straight surface and apply
cyan glue!

Now it is time to try out if all fits well!

Great - it does!

The second step was the position
of the
rc equipment in the fuselage:

First I prepared the space for the motor
and drilled a connection to the inside
of the canopy:

Cut of the nose after
measuring the size of the
spinner you are going to
use! Sharp knife please!

The I made the connection
tunnel between canopy and
motor space.
As a drill I used a 10 mm
CFK rod.

The use a small drill to
carve (sand) out the space
the little outrunner will need
to freely spin.

Then - from a left over epoxy
plate I cut a fire wall the size
of the spinner which will be
glued to the fuselage to
hold the motor in place.

Next came the
cut out of the lipo battery space - under the wings.

With a very sharp scalpel cut
through the side of the
fuselage! Don't cut through
it - just deep enough to
squeeze in the lipo!
Carefully remove the foam
particles (with a screw
driver in my case).
Then drill a tunnel
between lipo compartment
and canopy (with the CFK

Finally it was time to
install the motor in it`s place!

For that the fire wall was
drilled as per motor mount
measurements. The motor
was fixed on the firewall and
the whole thing was placed
carefully in the fuselage.
With a few drops of cyan
glue the position was made.
Then with more glue the
final fixing was achieved.
Last but not least the
spinner & prop was put
in place and the first test
run made - all ok!

Now it was time to
balance the fuselage to ensure that the plane will
finally fly without adding weight to it.

For that carve out the space
for the rest of the rc-
equipment: BEC & receiver.

I left the dome in place to
hold the canopy in the future.

Place all equipment in (incl.
motor) then find the balance
of the fuselage by placing the
elevator servo. Position in my
case you see on the picture.

Next came the cut out for the
elevator servo installation.

For that I used a very sharp
knife to cut a slit from the
canopy to the position of the
elevator servo. The cut out
for the servo was made
through and carefully en-
larged with a Dremel-drill.
Now the servo was inserted
and the cables extended
and inserted in the cut-out.
Finally all was tested again.
The connection ´between
servo and elevator rudder
was made with a 1,2 mm dia steel rod cut to fit exactly the length.

The wings with the
aileron installation was the final step:

Mark the size of the servo on
the underside of the wings.

Cut out with a sharp cutter
the wings -in my case I cut
through the wings. Then I
sliced the cut out part with a
sharp knife - one thin piece,
the top of the wing - which I
glued back into space.
Like this you get a perfect
top surface but still have kept
the strength of the wing.
After the installation of the
first aileron servo you need
to slide the wing into its
place in the fuselage - only
then you can install the 2nd
aileron servo (if not, the
servo horn will prevent the
sliding though of the wing!).
Now you can glue the rudder
horns of the ailerons and
connect the servo with the
rudder horns!

Finally a look into the completed canopy - the programming of the TX and
the double checking of the balance point has been completed too.

Now the AIR RIDER is ready for take off!

Flight Experience

Finally this little plane got its first flight in July 2012.
Lipos charged, rudder checked and of it went - well I was really surprised
how steady it flew - but it likes speed! Coll the rolls, the loops and even
inverted. This plane flies very well and I must say until today the best kids
plane conversion I have ever made.

It will join my family and me during the upcoming summer holiday.


Still to come...
Site for radio controlled airplanes and more ...
AIR RIDER (rc conversion)
  Foam (EPO)
550 mm
500 mm
g dm2
WEIGHT (producer):
50 g (free flight)
g (rc-conversion incl. lipo)
Robbe Roxxy 1815 / 17brushless outrunner
  16 g, 2900 rpm/volt, max. 150 g thrust, max
7,5 A
  6" x 3,5 " folding prop
Robbe Roxxy 710 (10 A)
Futaba 2,4 GHz, 4 channel, 4004
Lipo Ray,2 cells, 320 mA
4 (1x elevator, 2x ailerons, 1x motor)
  all: Robbe X-31
Intermediate & Pro
All rights reserved by and its owner!
Other videos you will find here!