Graupner GmbH & Co. KG MC-20 用户手册

下载
页码 324
223
Detail program description - Profi -trim | Helicopters
"Point" column
The lines of the column "Mixer" were used to select 
one or mixers. Now, in the "Point" column, the 
reference points to be trimmed will be set. 
To do this, use the selection keys on the left or right 
touch pad to move to the desired value fi eld. Then 
briefl y tap the center 
SET
 key of the right touch pad …
Mixer
Point
Phase
Slide1
free
free
free
None
None
None
L
1
1
1
1
Pitch
L
L
L
If a undefi ned point is selected  – in the basic version, 
only points "L" and "H" are set – the respective 
regulator will remain ineffective.
The point offset (in a maximum range of about 
±12 %) for the selected mixer will simultaneously be 
displayed in the curve diagrams of the »Helicopter
mixer
« menu so that the offset can also be checked 
visually.
Phase
The rightmost column is used, if desired, to determine 
which programmed fl ight phase the given regulator 
is to be active. The number preceding fl ight phase 
names, in the example "1" (Normal)", are based 
on the phase numbers as found in the »Phase
assignment
« menu on page 148:
Mixer
Point
Phase
Slide1
free
free
free
None
None
None
L
1
1
1
1
Pitch
L
L
L
However, the current position of the regulator 
will be – contrary to the corresponding fi xed-wing 
program – set to a new zero point when …
by a change of fl ight phase, individual or all trim 
controls become active or
the given trim control is erased or
meanwhile the function assigned in the "Mixer" 
column is to be changed.
In all of these cases, the current regulator position will 
be stored and automatically overridden, i.e. adopted 
into the curve characteristic, by the pre-programmed 
curve points specifi ed by the »Channel 1 curve«
and »Helicopter mixer« menus. In this manner it 
is possible to simultaneously optimize up to four 
arbitrary curve points during the fl ight.
The memory storage option described here is, for 
example, useful during the fi rst test fl ights of a new 
model as this permits the "fl own" fl ight corrections to 
be immediately recorded in the program.
However, in order to have a clearly defi ned reference 
point prior to the fi rst time a store is done, it is important 
to put all regulators into their middle positions. 
But always be careful that, after repeated stores, 
servo travel is not too severely restricted on one side. 
Check and correct the control linkage if necessary.
Sometimes, despite an optimal basic setting for the 
model, it becomes necessary to temporarily change 
reference points, for example, when the weather 
has changed and the motor requires a short-term 
correction or even when the muffl er gets a leak 
unexpectedly, etc. Of course, in all of these cases, 
the corrected settings should not be stored via 
the Profi  trim option. Storage can be prevented by 
ensuring that the regulator is in its middle position 
before activation or deactivation.
Note:
Yet another point, independent of this, can be 
regulated via the "Trim function" through use of 
the selection keys. This is described in detail along 
with the programming of 8-point curves in section 
»Channel 1 curve« on page 131.