The second option to control the RPM Governor for nitro/gas helicopters is to use a separate switch channel. Here the throttle
curves/throttle channel is used for manual throttle servo control only. The RPM Governor is activated and the headspeed is
preset by using the additional channel. When the throttle channel is above 25% and a headspeed is preset, the RPM Governor
will activate and control this headspeed. Moving the throttle channel below 25% will switch to Autorotation mode.
Manual control
• Range between
0% und 50%
directly controls
the throttle servo
Autorotation
• Throttle in idle
position
• When switching back
to idle up (>50%)
motor will restart
quickly
• Switching back to
manual control (<40%)
will disable governor
45%
Status LED blue
Status LED o
Idle up
• Throttle set between
50% and 100%
equals headspeed of
600 - 3000rpm
• +5% = +240rpm
Status LED red
or purple
75%
1800rpm
100%
0%
50%
Manual control
• Throttle curve
controls servo
• Governor o
• Governor channel
below 5% (-90)
Status LED o
50%
100%
0%
100%
0%
Throttle curve
(throttle channel)
Governor
control channel
Governor menu point E - Signal divider
Electric helicopter with brushless phase sensor or phase signal from ESC: signal divider = motor pole count : 2
Nitro/Gas helicopter with magnetical or optical sensor: signal divider = number of triggers (i.e. magnets or optical markers)
Governor menu points F G H - Main gear ratio
When the helicopter has a single stage main gear: Main gear ratio = Main gear tooth count : Motor pinion tooth count
Set the Status LED color/state at each of the menu points F, G and H so that the main gear ratio can be calculated as sum
of the three menu points, i. e. 8.55:1 = F ashing purple + G purple + H ashing red
Idle up
• Governor channel set
between 5% and 100%
(or -90 and +100 on some
transmitters) equals
headspeed of 600 - 3000rpm
• +5% (or 10 clicks) = +126rpm
• throttle channel must stay
above 25%
Status LED red or purple
Throttle curve
(throttle channel)
Governor
control channel
50%
100%
0%
100%
0%
52,5%
1800
rpm
Status LED o ashing purple purple ashing red red ashing blue blue
E Signal divider
1 2 3 4* 5 6 7
Status LED o ashing purple purple ashing red red ashing blue blue red/blue
F
User den-
ded
8.00 9.00* 10.00 11.00 12.00 13.00 14.00
G
+0.00 +0.20 +0.40* +0.60 +0.80 - - -
H
+0.00 +0.05 +0.10* +0.15 - - - -