...... a
name in model engines that is synonymous with incredible power,
precision, robustness of construction and exquisite
quality. Rossi engines came into the world with a single purpose: to
excel in competition. Over the years the successes achieved have made the
name Rossi revered and legendary among connoisseurs of fine machinery.
To many hobby enthusiasts great success in competition may not seem
important. What is important, though, is that the tremendous demands of top
competition produce the best engines. Nowhere else but in the quest for maximum
performance will the highest standards of power, precision and durability be
achieved. Quite apart from the legendary power of Rossi engines, this translates
to extremely long engine life, the best in reliability and the ability to stay
together where other engines won't. Whatever your application, sport or the most
serious competition, aircraft, helicopter, boat or car, Rossi offers the finest
in model engine technology.
The engines offered by AXE Motor Rossi
and RAL Micron today represent the continuation of a very proud tradition. Here
follows a brief outline of the history that made the Rossi name what it is
today.
The story begins in the 1950s, when the brothers Ugo and
Cesare worked in the business of their father, Giovanni Rossi, a watchmaker.
There can be little doubt that the very high standards of minutely intricate
craftsmanship demanded by this work would have played no small part in the
awareness of the need for great precision that developed in the minds of the two
brothers. This awareness would have stood them in excellent stead in their quest
to extract maximum performance from the SuperTigre G20/15 control line speed
engines. The SuperTigre G20/15 glow engine became the class of the field in the
FAI F2A class of control line speed when Amato Prati set a new world record for
this class in 1954. Giovanni Rossi supported his two sons in their engine tuning
work until they reached the stage where they were able to convert their great
talent and flair into a viable livelihood.
In 1960 Ugo Rossi became world champion in the
F2A Speed class with an unprecedented speed from his G20 powered New Devil
design. 1960 was also the year in which Fratelli Rossi, the company founded by
the two brothers, was set up in Cellatica. Apart from their engine tuning work,
they offered custom made speed pans and aluminium spinners to suit the
SuperTigre G20 and the New Devil design. It was not long before the first engine
bearing the Rossi name was made. The story is not an uncommon one seen against
the background of racing in Italy. Just as Enzo Ferrari came to prominence by
showing his great drive and talent in the racing division of Alfa Romeo before
going on to make legendary racing machines bearing his own name, just so did Ugo
Rossi excel in his work with the finest Italian racing engines of his day before
going on to write new chapters in the story of the power that could be extracted
from model engines.
In 1970 Rossi offered the first .15 speed engine
equipped with a tuned exhaust that anyone could buy. This changed the face of
F2A speed flying forever. Up until then the event had been the preserve of a few
factory employed designers having the facilities to make engines specially
designed to run on a tuned exhaust pipe. Almost no-one else had access to these
engines and the only way in which the rest could hope to try to compete was to
conduct their own experiments with home-made tuned pipes and much modified
existing open exhaust engines. With the arrival of the Rossi R15 engine the
field had been leveled, and these magnificent engines shone in the hands of
speed fliers from all over the world. That is the true Rossi legacy: to make the
most advanced engine technology available to everyone.
As the years after 1970 rolled on, the successes of the Rossi R15
established the Rossi name as the creator of the finest in model engine
technology available, and this was crowned by the list of world champions who
won with Rossi engines and became legends in their own right. Names such as Ugo
Dusi, Giancarlo Ricci, Emil Rumpel, Juergen Lenzen, Pietro Fontana, Luis
Parramon and Sandor Szegedi are deservedly great names in international model
flying. To view some archival photographs from this very special history, please
visit our photo gallery.
Rossi's superb standards of precision,
durability and power had been established and accepted by the world as the
highest, but Ugo Rossi set himself other goals still. With the introduction of
the first CNC machines, an investment involving millions of dollars, production
could be increased not only with no loss of quality, but with a higher degree of
precision than had been possible before. Where most engine manufacturers had
employed injection moulded crankcases, which is a relatively cheap and easy
method of making them, the very first Rossis had used sand cast cases. This is a
much more expensive method, but it produced crankcases that were far stronger.
In more recent years Rossi crankcases have been manufactured by means of an
investment process, which produces cases that are as strong as the older sand
cast ones, but without the slightest pin-holing. Rossis's commitment to
producing the best from all points of view remains unchanged.
In 1982
Cesare Rossi left the company to begin his own, specialising in the manufacture
of racing car engines. With the dissolving of the original partnership Ugo Rossi
set up Rossi Elettromeccanica srl in an expanded factory building comprising
5000 square metres and employing the latest in CNC technology, including several
Swiss working centres, Japanese lathes in addition to the finest precision
grinding and milling machines.
After the death of Ugo Rossi on November 30th, 2002 the
company was re-named AXE Motor Rossi, with Alessandro Rossi, who had managed and
developed the company's expansion programme, at the helm. The proud tradition
initiated by Ugo Rossi remains at the centre of the new company's aspirations
and the commitment to the pursuit of excellence remains unchanged.
ROSSI ENGINES: PRECISION OF MANUFACTURE
Precision
has often been listed as one of the main hallmarks of Rossi quality, but perhaps
we should highlight a few of the key areas where our standards place our engines
in a league that is head and shoulders above that of the competition.
The terrific power that has always been associated with
Rossi engines would not be possible without the incredibly high standards of
precision that we make it our business to maintain, but these standards are also
responsible for the amazing reliability and long engine life that anyone buying
a Rossi can expect with complete confidence. Every Rossi engine carries a 3-year
warranty and this is a measure of our confidence that we gladly pass to
you.
And now for a brief overview of the standards of quality control
that are applied to make your Rossi engine the marvel of precision engineering
that it is.
ABC PISTON & CYLINDER ASSEMBLIES:
Rossi’s
legendary achievements at the highest levels of international competition have
included the use of superb ABC piston & cylinder metallurgy ever since the
technology was first introduced. Consisting of a lapped aluminium piton running
in a tapered brass cylinder whose inside face has been plated with hard chrome,
this system was developed to allow racing engines to withstand the huge
increases in rpm brought about by the introduction of the tuned exhaust pipe
into the competition classes.
Although it was an innovation developed
specifically for racing engines, it is yet another example where racing has
provided the laboratory to develop technologies that would ultimately bring
enormous benefits to all users. If operated with a reasonable degree of care an
ABC piston & cylinder assembly should last almost forever. Minute re-growth
of the piston as a result of expansion at operating temperature compensates for
wear and the fit is maintained almost indefinitely under correct operating
conditions. Attempts by several other manufacturers to replicate ABC technology
have been less than successful, however, and many of these have resorted to
metallurgies that are less durable and less expensive to
manufacture.
Every Rossi user has the advantage of having an engine
featuring a true ABC piston & cylinder assembly of the highest quality, but
the story does not end there. As engine tuners have known for a very long time,
the fit of the piston and cylinder is easily the larges factor in determining
how well an engine is going to perform. At Rossi very expensive equipment is
used to ensure that each piston is exactly matched to a corresponding sleeve.
The tolerances that are employed during this selection process are measured in
single microns. Similarly, the roundness of these components is checked to
tolerances that are measurable by only the most precise measuring equipment.
Cylinders are checked for parallelism using the same precise tolerances, thereby
ensuring that there is zero distortion when they are eventually fitted to
crankcases.
CONNECTING RODS:
Each Rossi connecting rod is made
from the finest ergal alloy available. The selection of this material and our
design give you the best combination lightness for internal balance and strength
possible. Connecting Rods are bushed with bronze alloy at both the big end and
the small end to ensure the longest possible life, but equally important is the
attention that we pay to correct crankpin and wrist pin clearances to prevent
breakages and excessive wear. Ensuring that big end and small end holes are
bored exactly parallel to within the minutest tolerances is undertaken with a
degree of meticulousness that would astound anyone not familiar with practices
at Rossi. Incredible precision in this area lies at the very heart of the power,
reliability and long engine life that connoisseurs of fine machinery have come
to expect from Rossi. Most engines produced for the mass market simply cannot
even approach these standards and mediocre performance and short engine life are
among the inevitable consequences of
this.
CRANKSHAFTS:
Crankshafts are forged from the best materials
possible using processes that ensure optimal grain flow and hardness. This
results in crankshafts that are extremely resistant to bending and wear. They
are then ground to the same tolerances described earlier. At no stage is
anything left to chance. There are very well worked out procedures underlying
each aspect of what we understand as Rossi quality!
CRANKCASES:
For most engine manufacturers the manufacture of crankcases
is a matter of employing a compatible aluminium alloy that makes for easy mass
production by means of an injection moulding process. This may make good
economic sense for the manufacturer, but the result is not the best for the
engine concerned.
Injection moulded crankcases are not very strong or
crash-resistant, but there are less obvious drawbacks associated with them too.
Permanent expansion of the case after operating at running temperature for a
while can affect the alignment of the internal components of the engine and
undesirable consequences such as ball bearing failure and a sudden falling off
in performance can result.
Rossi crankcases are cast from a special
aluminium alloy having a high silicone content that makes them very strong and
resistant to expansion. This unique alloy cannot be used in conventional mass
production injection moulding processes and as a result Rossi crankcases are
cast individually by hand using a specially developed gravity fed process. This
is yet another case where our manufacturing costs are far higher than those of
our competitors, but at no point in the manufacturing process is quality
sacrificed in the interests of cutting costs. The decision to buy a Rossi engine
is one that centres on value for money and not on price alone. However, as any
long time Rossi user will tell you, by buying a Rossi you will score in every
respect. It is to be hoped that our explanation of what goes into our engines
will explain why this should be so. The best may cost a little bit more, but it
is certainly worth considering what that little bit more buys in the case of
Rossi engines!
The AXE engines are made for competition and are
synonymous of incredible power, precision, robustness of construction,
scrupulous assembling care, and exquisite quality.
The RAL engines are
made to offer an economic line respecting the exquisite quality. Beginners can
have an excellent, easy and reliability
engine.