The sliders on the back of the transmitter
are difficult for the author to move without
releasing the control stick. Other modelers
may not have this problem.
The author’s Flyzone
A6M2 Zero requires
seven channels and is
a perfect match for the
Tactic TTX850 radio.
This will likely be a first computer radio for many
aeromodelers. For them, it is helpful to not only know how to
make a change to the radio setup, but also to understand how
the change might affect their model’s flying characteristics.
I have programmed the TTX850 for several models
including two airplanes, a sailplane, a helicopter, and a
multirotor. Some of them are transmitter-ready models, while
others have a Tactic receiver that I installed. In every instance,
the radio configuration process went smoothly and the radio
has performed without hiccups.
Although a neck strap is included, I have not used it. I prefer
to hold my transmitters and use a pinch grip on the sticks.
Because of the size of my hands and the grip that I use, I
find the sliders on back awkward to manipulate. Until I can
train my third finger on each hand to move the sliders, I have
to release my pinch on the sticks to actuate them. Other fliers
with different-size hands or alternate gripping styles may not
have any problems with working the sliders.
When I write reviews, I often try to put the product into
the hands of some of my flying friends. This gives me a range
of opinions to draw from and also helps me calibrate my own
I was a little sneaky with the TTX850 because I asked my
friends to fly a particular airplane, but didn’t mention anything
about the radio that I handed to them. I noticed that the pilots
who own other Tactic radios took notice of the TTX850 and
commented—all of them positive.
My other unsuspecting evaluators said nothing about the
radio. To me, their silence is just as informative. It tells me that
the radio performed as expected and didn’t have any balance
or feel issues that would make it stand out from their radios.
I noted in the beginning of this article that the TTX850
would make a good first computer radio, but I don’t mean to
imply that it is only suited for rookies. Some of my more-costly
radios may have more channels
and/or fancy features such as
telemetry and color displays, but
there is nothing that prevents me
from using the TTX850 with any
model in my fleet. It has all of
the features needed to handle the
majority of aircraft you’ll find at
any flying field.
In my case, the TTX850
replaces my “go-to” radio for
park flyer and transmitter-ready
models, a six-channel Tactic
TTX650. My older Tactic still
works fine, but some of my
newer aircraft could make use
of the TTX850’s two additional
I think that my upgrade will
be a common path for current
TTX650 owners. The TTX850
will allow them to step into more
complex aircraft, or utilize additional features on the models
they already have.
I think another set of potential customers for the TTX850 is
pilots who simply like to have several models (who doesn’t?).
Because the compatible receivers are relatively inexpensive
(six-channel units sell for roughly $20), it doesn’t get
outrageously expensive to outfit a large fleet of aircraft. The
radio can support up to 30 model profiles.
As average ARF models become more complex, the pilots
who fly them will need a radio that can handle additional
operations. The TTX850 isn’t flashy, but it is affordable and
has all of the features and adjustability that most fliers will
63 Model Aviation DECEMBER 2015