Model menu
Collective pitch -> tail rotor
Mixture adjustment
F X - 4 0
ting - regardless of the speed with which you change the set-
ting. The same applies at the opposite extreme: when you
reduce motor torque or the collective pitch setting, the heli-
copter must not rotate around its vertical axis.
The screen shot below shows an example of a programmed
Revolution mixer.
19.9 MIXTURE ADJUSTMENT
This function is used to set up a separate servo for adjusting
the fuel mixture at the carburettor. A particular advantage is
that it is possible to link it to the normal throttle function. If this
option is activated, the needle valve is adjusted automatically
when you open or close the throttle; when set correctly, it
should produce a reliable motor run at all speeds.
In its effect and handling this option is exactly the same as the
mixture adjustment function already described in Section 17.4
on page 63 for fixed-wing models powered by a glow motor.
Please refer back to that point for details of the actual pro-
gramming procedure.
However, for glow-powered helicopters this function is parti-
cularly important, so we will show the essential displays at this
juncture and provide a brief explanation of them, as they relate
to an ‘HR-3 120°’ model helicopter.
When you activate the function, the screen looks like this:
This screen shot shows the trim and acceleration settings.
The two screen shots below show a typical example of pro-
gramming this function, with suitable values entered and a
mixture curve already set up.
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