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- Basic Throttle & Pitch curves for
My grateful thanks go to dyls1
in the Heliguy Forums
for allowing me to use his diagrams and for the inclusion of some
For some strange reason
there is quite a bit of
misunderstanding about both throttle and pitch curves when using a
programmable computer radio system such as the Spektrum DX6i or
similar. I suspect this is because the documentation that comes
with these radios does not provide any real guidance in these areas (or
others for that matter)
Hopefully this brief
article will help to clarify what the curves are, and what settings are
a good starting point...
A properly setup head
will give you a pitch range of about -9 to +9 degrees so every for every
change of 1/18th should equal a degree of pitch.
In the examples below
there is a pitch range of just under -2% to +9 in normal mode. It gives
a nice gentle decent but you may need to increase the negative pitch
slightly (33 at zero stick would be -3% pitch) if it's a little windy as
it can be hard to land without going into idle up.
The above image shows
the NORMAL pitch range starts at around 40%, which is around -2 or -3
degrees pitch. The STUNT (IDLE UP) starts at 0%, which is full
negative pitch of -9 degrees
The STUNT/IDLE UP
throttle curves may be a little less obvious, but the NORMAL curve is just
that. The diagram below shows a classic curve for the throttle in that it
climbs rapidly to 60% initially, and before you even reach half throttle
stick, so that we can get the rotor head speed up quickly, and then increases
a lot more slowly for the rest of the throttle travel.
The STUNT/IDLE UP curve
is again a classic. At 0% throttle stick we actually have FULL THROTTLE,
which will be used when we are inverted. At the 50% throttle stick we
have 80% throttle, and again at full throttle, we return to 100% throttle, for
normal flight. You should also note that the NORMAL and STUNT throttle
settings CROSS at 80% throttle, so that is the throttle position you need
before switching between NORMAL and STUNT modes.
can certainly vary these to suit yourself, but the curves shown above are a
perfect starting point for configuring a DX6i or similar radio.
I HOPE THIS
ARTICLE HELPS NEW DX6i OWNERS TO GET STARTED
WITH THEIR SHINY NEW (and EXCELLENT) RADIOS...