Th-Cut (Specialized Settings For Helicopter Specific Models) - FUTABA 7CAP Instruction Manual

GOAL of EXAMPLE:
Set up Normal Flight Condition
Throttle/Collective Pitch Curves
and Revo.
Base point: Adjust base point of
throttle curve until engine idles
reliably on ground. Adjust base point
of collective pitch curve to achieve -4
degrees of blade pitch.
Apply throttle until the model sits
"light" on its skids. Adjust base point
of REVO. until model does not rotate
its nose at all.
Hover point: Adjust collective pitch curve
to +5 degrees. Ease heli into a hover.
Land/shut engine off. Adjust throttle
curves and rudder trim. Repeat until
model hovers smoothly at half throttle.
Rapidly apply throttle from 1/4 to 1/2
stick. Adjust REVO. points 2 and 3
until the model does not rotate its
nose upon throttle application.
High point: Adjust collective pitch
curve to +8 to +10 degrees. From
hover, throttle up rapidly. If engine
bogs, increase the throttle curve. If
engine over-revs, increase the
collective pitch curve at points 4 or 5.
Apply full throttle while hovering, then
descend back to hover. Adjust REVO.
until the nose does not change heading.
Where next?
THROTTLE CUT: The THR-CUT function is used to kill the engine at the end of a flight. The engine can be stopped with
one touch of any switch, eliminating the need to move the trim to kill the engine and then readjust prior to each flight. The
helicopter THR-CUT includes an ON/OFF throttle position (normally a little above idle). You must move the T
back below the set point before the THR-CUT function can be reset, to avoid sudden engine acceleration. For a detailed
S
TICK
example of throttle cut setup, see ACRO p. 33.
STEPS:
Open the THR-CV/NOR function.
Adjust the first point. (Ex: 5%.)
Open the PIT-CV/NOR function.
Adjust the first point. (Ex: 8%.)
Open the REVO. function.
(Ex: High 5%, Low 10%.)
Adjust THR-CV/NOR.
Adjust PIT-CV/NOR.
Adjust THR-CV/NOR.
Adjust PIT-CV/NOR.
GYRO function: see p. 72.
Adjust HOV-THR and HOV-PIT if needed: see p. 71.
Setting up Throttle Hold: see p. 67.
Setting up idle-ups 1 and 2: Throttle and collective pitch curves and revo.
mixing (TH-CURVE, PI-CURVE, REVO. MIX): see p. 69.
D/R,EXP: see p. 34.
Note: Be sure to add the step of setting a trigger point by cursoring to THR, then putting the
T S in the desired position and pressing and holding the dial for one second.
HROTTLE TICK
Notice that this function cannot be reversed to trigger only above the stick point.
66
INPUTS:
for 1 second.
(If ADVANCE,
to THR-CV/NOR .
to 5%.
to PIT-CV/NOR.
to 8%.
to REVO.
to 5%.
to 10%.
Repeat above as needed.
Repeat above as needed.
Repeat above as needed.
Repeat above as needed.
again.)
HROTTLE