Operation Manual

Manual
77
Note:
The angle must be entered with a negative prefix “ - ”
if the servo HEAD f/b is at the front when seen from
the tail, looking forward (Example 2).
Example 1: 3-point 120 swashplate
Geometry
+120
Rotation
+0
Example 2: 4-point 90 swashplate
Geometry
-90
Rotation
+0
Parameter: Rotation
Adjustment
range:
Range -100 ... 0 ... 100
Default 0
The Rotation parameter (also known as virtual swash-
plate rotation) must be used if:
a. the swashplate is positioned physically in the model
in such a way that the servo HEAD f/b is not lo-
cated on the centreline,
b. the model (typically) tends to roll when a pitch-axis
(elevator) command is given.
Virtual rotation required in the clockwise* direction
 negative values for Rotation
Virtual rotation required in the anti-clockwise* direction
 positive values for Rotation
*Swashplate viewed from above
90°
140°
Flight direction
Rotation 20°
Geometry
Rotation 20°
Flight direction
Parameter: Lever +/-
Adjustment
range:
Range -100 ... 0 ... 100
Default 0
The parameter Lever +/- is only required for three-
point swashplate linkages whose linkage points are
not equi-distant from the rotor shaft centreline, usually
for mechanical reasons.
The difference is set as a percentage of the radial di-
mension (rotor shaft centre  linkage point) of the
servo HEAD f/b to the two side-mounted servos HEAD
le and HEAD ri. The lateral levers are set to 100%.
Example:
Distance HEAD f/b: 40 mm
Distance HEAD ri / le: 50 mm (= 100%)
In our example the lever for the fore-and-aft linkage
(HEAD f/b) is 20% shorter than the levers for the two
side-mounted linkages.
 The correct setting is: Lever +/- -20%.
40 mm
50 mm
Forward
HEAD 4
90
HEAD ri
HEAD le
HEAD f/b
Forward
HEAD f/b
120
HEAD ri
HEAD le