The building project:
December 3, 2011 - the building of this project started!
First of all all rc equipment was selected, purchased and lined up:
The selected rc equipment: Servos BEC-Multicont BL-37 Receiver Futabe R617 Motor Himax 2816-1220
2. Unboxing the planes....
3. Building the middle section of the wings:
from the point where the wings join the fuselage I measured 21 cm towards the other fuselage and cut the wings at this point - so from fuselage to fuselage I gut 42 cm
distance at this point. Take a very sharp knife! Do the same at the mirrored side (second planes wing half).
Then I joint the both middle section - fist I made just in the middle a glue point with cyan glue. Then I aligned the wings very carefully by using
the supplied CFK rod in the wings bottom. I cut the CFK rod to the length needed. Carefully re-aligning one more time. A few more drops of
glue! Finally I toped to top of the wing with a strong tape - turned the wing section arround and filled the joining gap as well as the CFK rod trench with ample glue.....
Next I selected another CFK rod which fit into the whole of the original one (3 mm dia full CFK rod) - that one I cut to 80 cm length. I inserted it through the middle section so
this will connect the other wings on either side of the fuselages! I glued this inner core CFK rod in place with very liquid cyan glue (a drop on either side). Finally I applied
strong tape all around the middle section and applied even more cyan
glue in the middle crevice.
To finish the middle section I cut the flap from a 3 mm balsa sheet. As a hinge I used again the
strong tape which I applied from top and bottom! Done!
4. The first assembly was next! See the "Taurus G4" for the first time - still without motor dome and
connecting the servos, or cutting the ailerons!! What a great looking project ...
5. Now it was time to get going on the motor dome on top of the middle section! Surely the hardest part of the entire building project!
For that purpose I went back to use good old balsa sheets - 3 mm thick, with additional plywood and balsa rods. In total the length of
the middle section is 26 cm and hight 6 cm - enough to take the lipo (even a 3s would be fine).
First I had to measure Then it was time to cut the pieces
the length and hight of to size and shape using a sharp
the balsa sheet and then balsa cutter.
marked the wing cut out The laser cut fire wall and section-
using the cut-off part of deviders are from a gutted depron
the outer wing sections. plane! They fit perfectly - so I saved
lot of time cutting them. All was glued
in place by standard wood glue.
It was time now to glue the top and bottom sheets and assemble the motor dome. For the front section (top & bottom) I used a 10 mm balsa sheet to give enough
material so I could sand the dome front section nicely to a round aerodynamic shape fitting the spinner of the propeller! The motor holder was glued with 5 min Epoxy.
6. The flap servo installation 7. The cover for the motor dome was up next - so I cut and sanded to fit another piece
before closing the motor dome of 10 mm balsa sheet. On the bottom of it I glued a little latch to hold it in place in the
on the top & bottom...for that I cut front. The back will be held by a strong neodyn magnet.
from a 10x10 mm balsa rod small
pieces, fixed the servo and glued
it in place (at the end of the motor
8. The end of the motor dome was carved and sanded out of three
layers of 10 mm thick balsa sheets. The middle one was cut in
such a way that it would fit into the back opening of the motor
The entire end will be held in place also by two strong magnets
which will be installed after sanding and spaying of the motor
For carving purposes I glued the end part and the top cover of the motor
dome with two drops of hot glue. That holds good enough to carve and
sand the round shape!
Now it was time to start the carving and dusty sanding procedure....
9. The Ailerons installation in the outer wings was the next step.
First I marked on the underside of the wings the location of the ailerons (3 cm x 25 cm). The location of the servos I marked in such position so that the servo cables did
not need extensions to be plugged in the fuselage. Then I cut the ailerons free. To keep the ailerons connected to the wings I carefully carved the underside to leave some
foam material as hinges. Very carefully....
10. The marriage of the motor dome with the middle section of the wings.
With ample of super glue I fixed the motor dome on the top of the middle section of the wings. Painstakingly measuring before the exact middle and perfect straight
forward looking of the motor dome! Then it was time to fix the motor with the BEC - which found its place just after the motor. Now It was time to drill a 10 mm dia hole
toward the underside of the middle wing so that I could run the servo cable extensions for the ailerons, rudder (on V-cable) and elevator (on V-cable). The 7-channel
Futaba receiver got its place just in front of the flap servo - so the middle section could remain empty for the lipo. Finally the prop was fixed!
An additional piece of balsa was glued on the underside of
the wings and sanded to the same shape of the front part of the
motor dome (see picture above - just below the cable hole).
Right - the motor dome is still in its original balsa wood,
however I plan to test fly it before painting and applying all
decals and decorative elements.
The cables were fixed in the
extended canal of the CFK
rod. With a Dremel I exten-
ded the space needed for
the connections. Then the
whole bunch of cables and
the canal were covered with
a strong white tape.
11. Now it was time to glue the center wing together with the two fuselages - for that I had to drill a cable connection hole with a Dremel. The servo cables for the elevator
and rudder was rolled up in each canopy and secured with a stripe of tape. Be sure to double check the connections of the extension cables!
The aileron extension cables I passed through the wing hole to the other side of the fuselage.
Before gluing both fuselages to the center wing section, be sure to measure the exact distance between the bodies - I used the tiles on the floor as measurements - lined
up both fuselages and the center wing and connected them with a few drops of super glue. Once that was dried up, I used ample of super glue to give the needed strength.
Then - finally - the outer wings were attached, the lipo inserted, the prop fixed and for the first time all servos were tested and their direction checked!
Now it was time to do the final assembly - fix the elevators with some drops of glue - attach and trim all rudders and fix the GC as requested in the manual.
READY FOR TAKE-OFF!!!
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