wkevinm
Thanks for your words. I'm an italian aeromodeller and I don't think at the fact that other people too can be interested to our works!
Now I have translated with Google Translator all the txt of my article (automatic translation may be very fun!) and I enclude it down here.
Bye bye from center of Italy.
Cg
Fulginium Q500
Pylon from class Quickee Q500.
The Remote Past.
For many years I do flying models and, like many of us
with age between the forty and fifty, I passed through several
aeromodellistic categories: first models to elastic, fly free, then always to motomodelli flight
free flight gliders and finally the radio flight.
(Cristiano years ago and Leo)
For my generation buy a box of assembly, a
balsa kit as we call it now, it was like not knowing how to
make a plane totally alone.
I still remember the "History of Aviation" dispense with the
beautiful triptychs that I
redesigned and enlarged in scale for me
and for my friends in order to make the
reproductions.
Designed templates or fantasy when I was
the same designer, manufacturer and tester.
It was the eighties and the pilots of aeromodellistic
group of Foligno, my city, are crazy for F3a.
We had three pilots in national ranking: Sergio Bergantini,
Franco dal Bello and Mario Belloni. This, in particular, has the merit of
bringing the first radio proportional to Foligno.
Mario, at the time airline pilot, bought his first
radio in the United States where people flies with gas
on the left and thanks at this fact in Europe our group
is now the only ethnic minority that flies in
"mode 4".
Perhaps for love of knowledge of a larger modeling
landscape or simply for spirit of contradiction
I was much more interested in the Team Racing,
to Combat, and Pylon than F3A.
Closer Past.
At the beginning of this year 2008 I decide that time is come
to learn more about Pylon.
With the tenacity (read: cheek) that stands out to me I
inform, consult Google, who was the Italian champion
Specialty and discovered that his name is Paolo Mucedola.
With a series of searches and cross call on the phone I were
immediately entered in the world of speed.
I just wanted to start with the aircraft Formula FAI F3D
but Paolo convinces me to go step by step and contact Fabio
Desolei, Quickee Q500 chief, for practice
School of Pylon.
In the meantime I speak of my initiative with three other friends
Pilots of my group: Augusto Buzzeo, Leonardo Radi and
Giorgio Marzioli.
Always exactly following Fabio Desolei indications we have
mounted 4 boxes of ARF Grand Chelem Q500 by Topmodel
equipped with Quickee Rossi engines.
With very few flights of training we were thrown in
races and have disputed the Italian Q500 championship
placing our pilots no less than the 2nd, the 4th, 5th and
8th place national ranking. (IMG_4879.JPG)
The name 393WR.
The Pylon Aeromodellistic Group of Foligno took
its own identity giving 393WR the name that now we explain.
Years ago, into an hangar of our local Aeroclub, were a beautiful
Fiat G 46, two-seater that was almost brought to flight
only a pilot whose life had strong shades of pure
adventure.
Walter Rattichieri, so called, was a pilot
hunting on Fiat Cr 42 then aircraft tester and fine
acrobat air.
(The G-46 with Walter.jpg)
His was a memorable passage with the above mentioned G46
in knife flight at very low altitude between two rows of poplars along the
the road of Foligno Aeroclub.
So the name chosen for our pylon team recalls
both the initial W.R. of great Walter and 393° Squadron
by Hunt to which he belonged and it seems that what we have
brought luck. (393 wr indirizzo.jpg)
The Present.
After a season of racing there seems finally to have understood what
should have a model to win in competitions
Q500.
So we put together our insights and after an
Autocad short step for the design, we printed a
project executive in 1:1 scale with which we went from
Gino de Dominicis, great for the building.
For those who do not know who is Gino say only that in the years
'80 who had bought a box of mounting "Made in
Italy "would have a good chance to buy a Gino
product. When we said that we needed for a prototype
Gino told us that between one and ten models the
execution time would not have changed that, whereas
waste and errors in processing, would put immediately
been working 20 models. Understand what kind of person?
The Model.
We intentionally wanted to linger in a preamble to
is not purely technical but purely human, that
allowed to show that things better than that
give more satisfaction comes from the head and the heart
of people.
Each of these flash has a history that is not only the
story of a project but the summa of histories and words
who gathered to become shape.
The accuracy of CAD design, execution and masterful Gino,
all the words to costs and find functional solutions
allowed to give birth to the model that now
we finally to explain.
The Q500 is the class that marks the "entry level" in the world of
Pylon, so these models are vital, robust and cheap.
Italian rules requires wooden fuselage, same goes for
the wing that may be all wood or coated polystyrene.
However, it is not permitted any part who comes from the mold.
This does not mean that the essence can not be
refined, and that attention to detail can not be
also economic.
The draft of the model started by choice of the profile.
To enable high speed with minimal drag would think to a profile
biconvex symmetrical as profiles of NACA 64 series. The
symmetrical profile has the characteristic of being neutral and
have, therefore, a moment equal to zero. So his
behavior is the same in reverse flight too.
For use on a highly technical plane for Q500 competition
like that, Doctor Eppler of Stuttgart University in Germany,
has developed a series of profiles taking into account that
a pylon model never need to fly upside down.
Thus were born the legendary asymmetric profiles the E220 and E221
which, on a perfectly shaped wings, have
very good results with low resistance
with progress and a good coefficient of lift in close turns
that airplanes are submitted by pylon.
The profile of Professor Eppler were further
optimized with sophisticated analysis tools which digital
have shown that if you can not reduce reduce
resistance beyond a certain limit, it is also
can improve the performance of the laminar flow around
profile.
Martin Hepperle has achieved these improvements by making
point specifically for the Q500 profiles MH16 and MH17.
To download your profiles you can connect to your site
at
http://www.mh-aerotools.de/airfoils/
MH17 in particular is a high-profile benefits,
thickness 12.12%, small coefficient of drag, indicated for
Reynolds numbers equal to 400,000 and above and that is what we
we have chosen for Fulginium Q500.
Construction of the wing.
The polystyrene has chosen density of about 18 kg / mc. The plates
were the first team then left to mature
allow a smooth evacuation of moisture among the
cells of the material. The cut was done with a pantograph
parallel wire hot, obviously built by the same mythical
Gino, which allowed it to play a
single person.
After cutting the profile have been charged for the holes
servants wing, for the exit of the extension, for Headquarters
extensions and for the same slot of a bayonet Central
in hard balsa using wire always hot and changing the
Special dime specially built for this model.
For the coating wing was chosen in single Obec
sheet. (DSC_1592.JPG)
The legendary Gino say you should pay attention to the verse of
wood Obeche: if you look in a veneer with Obeche
a light grazing you will find that one side of the sheet, in
Matching wood fibers, has small
depression while the other side have that many and convexity
this because the process of cutting itself.
Well, areas with depression are those that go wet
glue and made adhere to the structure in polystyrene and not the
contrary. Indeed areas with the convexity made outside
once sanded wood will leave a significantly more
Smooth not having done the opposite. Think that the "Chinese"
know?
The glue used for bonding Obeche - polystyrene is
the Dual-epoxy capable of providing gifts in excess of
strength and deformability.
Following the wings are located below where the press should
stay up to the drying glue.
The next phase includes the installation of the board of entry into
balsa hard, burglary of the wings and the heading of
same with balsa and epoxy bonded. The wings are cut
and a wedge to maintain a smooth surface
sull'estradosso of the wing. For the hinges we recommend the use of
adhesive tape.
The tins of servo wing is derived from a
in balsa box with four strips of poplar to
ends cut into many slices depending on the extent of
locations of the servants. (DSC_1902. Jpg) The servant is screws on
hardwood small blocks, is biadhesive and then hangs
precisely in place. To lock everything we used a
sticker but you can use whatever you want. (DSC_1903.JPG)
Winglets.
No Q500 plane has to be because you prefer to adopt
a terminal in balsa wing or full trailer to end
the wing.
This model is an exception: the terminal is cut from profile
Obeche and clad in the same proceeding of wing and a
small winglet concludes the wing.
(DSC_1591.JPG) (DSC_1534 copia.JPG)
As you know the winglets increase efficiency because
decrease the resistance caused by the vortices induced to
, and a tip extended elongation without increase the wingspan.
Construction of the horizontal tail plane.
Wing same building with the only difference of
really tiny size of the profile N 64008 A.
(DSC_1585.JPG)
If you want the command horn lift may be
located inside the fuselage and is a by
do, of course, before pasting the plan to the fuselage.
(DSC_1565.JPG - DSC_1566.JPG - DSC_1567.JPG)
The postponement of control rod is made of wood with terminal
Metal hold with the shrink.
The hinges are glued to cyanoacrylates Mylar.
Construction of the fuselage.
The experience in the fields of competition has allowed us to
establish that the fuselage is the body that most of all must
be robust in an engine category Q500. Not so much
because the orderly separation engine and tear of
Cart unfortunately are on the agenda in a
Q500 competition but because to have a stable model is
also a serious fundamental longitudinal stiffness and
torsion beam of the fuselage.
The entire structure of the fuselage is balsa 6 mm with
sides that have been stiffened by the application of
two cheeks in birch plywood by 0.8 mm, in a muzzle and
the other tail, with large holes for the easing
glued with epoxy. Also bei in balsa ensure triangles
The absolute contact between the various parties. The bonding, when
are not in epoxy, are made of quality vinyl
Rapid drying (Bindulin). (DSC_1587.JPG)
The engine is always ordered birch 6 mm with wide joints,
bonding with Uhu Plus and triangles of balsa to avert the
dangers of posting.
The other ordered are in poplar plywood 3 mm.
(DSC_1589.JPG)
Complete all the milling of respecting the edges
range allowed by the Rules of 6.5 mm and a rigid unit
a lightness really insuperable.
As the legendary Gino twisting the fuselage and the grinding
teeth for the effort: It 'a bone!
The engine mount is the same as the Grand Chelem and houses
perfectly in the four nuts already Griffa
conditions in the engine so it is strongly recommended recycling.
(DSC_1580.JPG)
To access the servo motor and servants of the plans are Tail
been charged with bur holes that we have closed with corks
of balsa fastened with Scotch.
(DSC_1578.JPG - DSC_1581.JPG)
Construction of the vertical tail plane.
The rudder is made by working of a tablet
balsa from 6 mm to obtain its profiling with the cutter.
(DSC_1586.JPG)
The command is external. (DSC_1570.JPG)
The hinges are glued to cyanoacrylates Mylar.
Basket.
The basket is made of stainless steel laser cut. It 'a little
but heavy enough disk. Even if it is compatible
Cart Grand Chelem although the ideal would be to build
Ergal in a 2.5 mm. (DSC_1562.JPG)
Coating.
For the coating of copy photos we used in
dell'Oracover effect for the carbon wing extrados plan
Tail and the entire fuselage of the model. (DSC_1548.JPG)
For the belly wing and belly of the plan we Tail
dell'Oracover but always used a big black chess
silver.
Even the decorations are Oracover. (DSC_1536.JPG)
Two things I will always remember about this
material: its extreme quality and the feeling of space
its purchase has left in my wallet.
Flight.
Preparing three phases of flight that are many races to
in servo. A decidedly extended, a media and a
reduced. I decide to start with one that allows maximum
excursion to the servants and produces a displacement of about 1
centimeter to all moving parts.
The engine speed goes on and when the mechanic leaves his tail
I see the model as a starting harpoon straight and fast forward
to me.
Un po 'di cabra and the model is in flight. E 'beaten and
counteract his tendency to put down the muzzle on the act
trim to Cabri. Others do not need to correct if not a decrease
just the effectiveness of the rudder that appears deep
objectively too sensitive.
Landing is stable and manageable as a sailplane.
We say that its flight characteristics are beyond all rosy
forecast, now it is only to see a confrontation with his
more formidable opponent: the clock.
See you on the fields of race e. .. that's competition!
(DSC_1887 - from 1888 to 1894 - from 1895 to 1896 - 1898.JPG)
To see the video of his test just type
address:
http://it.youtube.com/watch?v=NlOXfWQ3rpg
Cristiano Giustozzi 393WR Foligno.