61
Chapter
– 13
Settings
P i t c h
Starting from the basic setting of the swash plate in the neutral position (on page 35), in which the blade holders are 0 °,
the desired pitch maxium and minimum values are first set. Follow the instructions of your FBL system.
In general, this is not different with the
LDS
(
L
inear
D
rive
S
ystem) as with conventional swash plate controll. I am not
going so far into the full benefits and background of the system I have already introduced in the TDR-II, since a lot of
articles have already been published. If you would like to have more detailed background information, you can also
download the TDR-II manual and look there again, but the setting values described there can not be transferred to the
TDF, since the link geometry is somewhat different.
Due to the smaller lever arm of the toothed wheel, the servo forces do not have to be so high, and the high pitch angles
will be achived by a greater servo way. Due to the linearity over the entire range, the adjustment of the desired pitch
angle is very easy because you can simply measure the distance of the rack to the rack holder at 0 ° (
red X
- picture
below) and then adjust the difference in mm to get the desired Pitch value. A swash plate gauge is no longer necessary
for measuring the maximum values.
1mm stroke of the rack corresponds to a blade adjustment angle of 2.4 °.
In the table, the corresponding pitch angles for adjusting the collective pitch are shown in steps of 0.5 mm. The values are
of course also in the other direction for the negative pitch range, which is set just the same.
I recommend to set the maximum and minimum pitch values in the yellow range depending on the individual needs and
the setup used.
More than 15 ° pitch are not recommended, because even the setup with 12S and a 700 engine comes to the
performance limit (at least, if one flies in the higher speeds).
Under 12 ° pitch are also not recommendable, since here at particularly low speeds the climb performance is relatively
modest.
Next comes the point of the cyclic settings. The manufacturer of your FLB- system usually specifies a reference angle for
the cyclic basic setting so that the system knows where. Often the value is between 6 ° and 8 °.
For this purpose, the swash plate should be at 0 ° position and then the menu point should be worked through according
to the manufacturer's specification. Either the swash plate automatically moves to a cyclic position, which must then be
measured and, if necessary, corrected until the predetermined reference value is reached, or it is necessary to move this
value out of the horizontal position of the swash plate itself.
Also hereby you can measure directly on the rack how far it has to move in order to reach the desired reference value of
the manufacturer.
Zahnstangenhub
in mm
Pitchwinkel
in Grad
0,5
1,2
1
2,4
1,5
3,6
2
4,8
2,5
6
3
7,2
3,5
8,4
4
9,6
4,5
10,8
5
12
5,5
13,2
6
14,4
6,5
15,6