Operation Manual

And
now
one small,
but
very important difference:
What
happens to the trims?
With many mixers
it is necessary to include the
trim
slider
positions
with the
"pure
stick signal".
For
exam-
ple,
that applies
to a V-tail, otherwise
it would not be
oossible
to trim the elevators
and rudder.
The
same
also
applies to
the elevator control of a
llying wing
model.
On the
other hand there are
mixers in which the
posi-
tion of the trim sliders should
not be included.
Example:
"snapjlaps"
on an aerobatic
model. In this case
the
wing control surfaces
should not deflect
when the
elevator
trim slider
is
shifted;
flap movement is only
required when
you
"control"
the elevator.
It depends
theretore on
your particular
application,
whether
you
want the
mixing inputs with or without
trims, and
this applies equally to the USR
mixers.
You
can
choose this too:
We will return to
the first
example
we discussed
here.
We had
this display:
ru:,Ft-fl
I iiI
{:+T+F:i
r I l'lF.
r: ELEr"rH
r
Press the
Z
key
again;
"ELEVATOR"
flashes.
lf
you
now
press
the
E
key,
"
+T" will appear
This means
"with
trim", and
indicates that the
tion is now
mixed in with the ELEVATOR
input:
rU:;Fj-l'1
I :'i I
{: +T+F:
i
r I I'lF. :: ELEr-rH+Tr
lf
you press
the
El
key again,
"+T"
disappears again,
and the
mixing occurs
"without
trims".
One last time:
Please bear
in mind
(as
already
described above)
that
you
must
re-assign the USR-Mixers every time
you
alter their definition,
otherwise the changes
will
not take eftect.
next
to
it.
trim
posF
Over the course
of its existence the
model helicopter
has developed
into
a sophisticated
and demanding
machine.
The
demands
these machines
make
on
the
radio control
system are no
less
comprehensive.
The
PROFI mc 3010, with its
vast flexibility, is more than a
match
for all these requirements;
thanks in in
particular
to the specialised
"helicopter
mixers" and the user-de-
fined
mixers, which can be used to
fulfil
almost
any con-
ceivable
need. Experts
will
also be
delighted to exploit
the
possibility
of
"switching
memories
in flight"
(see
page
68).
lf
you
already
have
some
experience with choppers
the
lollowing Section
will
probably present
no
problem.
ll
you
are a beginner
to the world oJ the
whirling rotor,
we strongly advise
you
to read and study
modelling
magazines
and specialist books
to complement the
information
in this
manual.
That is not because
the PROFI
mc
3010
is complicated,
but because
helicopters are
inherently complex.
And
because
it
is not
possible
to start with
2
or 3
functions,
as
with a
fixed-wing model. lt is far outside
the scope of
this
manual to
go
into
the basics
and finer
points
of
heli-
copter
control systems, as
they are by
no means as
easy
to understand
nor as easy to
imagine as those of
tixed-wing
models. Some of the commonly
used terms
are explained
in
this section
where necessary; and
you
will
find
some
further explanations under
"Some
heli-
copter
terms" on
page
76.
In
this Section
we start from the assumption
that
you
are
already familiar with the
way the transmitter works,
so that
we
can concentrate
on the characteristics oJ the
helicopter.
Even if
you
consider
yourself
an expert and a
helicopter
specialist
you
should
at least carry out a
few
"dry
runs"
with
the
fixed wing examples, so that
you
become
famiF
iar with the way the transmitter
works.
As
a
minimum,
you
should
teel
at
home with the
method of finding
your
way
around
the menus, and
with
selecting,
correlating and adjusting
servos and trans-
mitter controls.
Basically the
"helicopter"
transmitter is operated
in the
same
way
as
for a fixed-wing model.
Everything that we
have said up to now on
working with memories, mixers
and so on, applies
in f
ull
to the helicopter transmitter.
However, there
is
one
fundamental difference: every
modern model
helicopter is tlown with at
least
one
mixer right
from
the start, and
most oJ them
feature
sev-
eral mixers.
The
"collective
Ditch/throttle
curve"
is
another
feature which is
peculiar
to the
helicopter
world.
But now: down to business.
52