Heli-Specific Advance Menu Functions; Thr-Curve And Pit-Curve - RadioLink AT9S PRO Manual

Goals
Adjust the travel of the collective
pitch from +50% to -23%,
reversing the travel of all 3 servos
and decreasing their travel in
collective pitch only, on an HR3
SWASH TYPE.

5.3 HELI-SPECIFIC ADVANCE MENU FUNCTIONS

5.3.1 THR-CURVE and PIT-CURVE:

These 7-point curves are utilized to best match the blade collective pitch to the engine RPM for consistent
load on the engine. Curves are separately adjustable for normal, idle-up 1, idle-up 2, and idle-up 3. In addition,
a separate collective pitch curve is available for throttle hold. Sample curves are displayed in the appropriate
setup types (ex: normal flight condition) for clarity.
Suggested defaults:
• Normal: Collective pitch curve that results in points 1, 4 and 7 providing .4, +5, (+8 to +10)* degrees pitch. A
throttle curve setting of 0, 25, 36, 50, 62.5, 75, 100%.
• Idle-ups 1 & 2: Idle-ups 1 and 2 are typically the same except for the gyro settings, with one being
heading-hold/AVCS and the other being normal mode. The pitch curve will likely be similar to the normal
curve above.
• Idle-up 3: Collective pitch curves that result in points 1, 4 and 7 providing (.8 to .10), 0, (+8 to +10) degrees.
A throttle curve of 100, 75, 62.5, 50, 62.5, 75, 100 provide full throttle for inverted maneuvers.
• Throttle Hold pitch curve: Start with the normal pitch curve (for inverted autos, start from the idle-up 3 pitch
curve), but increase the last point approximately 1-2° , if available, to ensure sufficient pitch at landing.
This default recommendation assumes you are doing forward flight. If you are just learning, please follow your
instructor's guidance. Some instructors like a +1 base point for training so that the helicopter comes down
very slowly, even if your instincts pull the throttle/collective stick to the bottom in a hurry.
Adjustability:
• Normal condition curves are editable in the BASIC menu for convenience.
• All curves may be adjusted in the ADVANCE menu.
• Automatically selected with the proper condition.
• The idle-up curves are programmed to maintain constant RPM even when the collective pitch is reduced
during flight (including inverted).
• To change which condition's curve is being edited, cursor up to <COND> and change the curve named.
• For clarity, the name of the condition currently active (switched on in the radio) is shown in parentheses
behind name of condition whose curve is being edited. (Example: see curve displays below. Note that the
normal condition is active but the idle-up 1 condition's curves are currently being edited.
• Moving and deleting the curve point: The curve point (-stk-) can be moved to the left or right by turning the
DIAL (up to 2% in front of the adjoining point) and deleted/returned by pressing the DIAL for one second
alternately.
• Idle-ups and throttle hold pitch curves may be edited even before the conditions have been made active.
Activating their throttle curves activates these conditions.
Steps
Open SWASH AFR
function.
Adjust PITC travel to -23%
Close
65
Radiolink Electronic Ltd
Inputs
for 1s to BASIC.(If ADVANCE
again) . to SWASH
to PITC to -23%，
，
www.radiolink.com
AFR