FUTABA T8J-2.4G - Throttle Hold Function (THR-HOLD); THR-HOLD for Auto-Rotation Practice

80
THR-HOLD
: This function holds the engine in the idling position and disengages it from the THROTTLE STICK when
SWITCH E-+RU*-$LVPRYHG,WLVFRPPRQO\XVHGWRSUDFWLFHDXWRURWDWLRQ
Prior to setting up
THR-HOLD
KRRNXSWKHWKURWWOHOLQNDJHVRWKDWWKHFDUEXUHWRU
is opened fully at high throttle. Then, use the digital trim to adjust the engine
idle position. To have
THR- HOLD
maintain idle, move the THROTTLE STICK to
WKHLGOHSRVLWLRQ7KHQPRYHWKHKROG6:,7&+RQDQGRIIDQGNHHSFKDQJLQJ
the offset value until the servo does not move. To lower the engine idle speed,
or if you want to shut the engine off, input a higher negative number.
Adjustability:
,GOLQJSRVLWLRQRange of
-50%
to
+50%
centered about the throttle idle position to get the desired engine RPM.
6ZLWFKDVVLJQPHQW Assigned to SWITCH G (8JA) or E-+GRZQ
Adjustable in the
CONDITION SELECT
(
THR-HOLD
item).
 SRVLWLRQW\SHVZLWFKRQO\
Throttle curve: Since the throttle is moved to a single preset position, no curve
is available for
THR-HOLD
.
Collective pitch curve: Independent curve, typically adjusted to create a blade
SLWFKUDQJHRI
°
to +10
°
to +12
°
, is automatically activated with
THR-HOLD
.
5HYRPL[ Since revo. mix adjusts for torque from the engine, no revo. mix is
available for
THR-HOLD
.
 Priority:7KHWKURWWOHKROGIXQFWLRQKDVSULRULW\RYHULGOHXS%HVXUHWKDWWKHWKURWWOHKROGDQGLGOHXSSWITCHES are
in the desired positions before trying to start the engine. (We recommend starting your engine in throttle hold for safety
reasons.)
*\UR Gyro programming includes an option to have a separate gyro setting for each condition, including
THR-HOLD
.
This avoids the potential problem of the user being in the wrong gyro setting when going to
THR-HOLD
, resulting in an
improper rudder offset and the model pirouetting.
GOAL of EXAMPLE: STEPS: INPUTS:
Set up throttle hold.
Determine desired throttle position of
the idling engine, turn on
THR-HOLD
, and
adjust percentage as required to reach
the desired running point.
Open
THR-HOLD
function.
for 1 second.
to
THR-HOLD
.
Activate the function.
to
MIX
. to
OFF
.
Set desired engine position.
to
RATE.
to desired percent.
Close.
Where next?
PIT-CURVE
IRU7+5+2/'VHHS
DELAY
for
THR-HOLD
(to ease collective pitch response): see p. 84.
GYRO
setup: see p. 87.
6HWWLQJXSWKH,GOH8SV7KURWWOHDQG&ROOHFWLYHSLWFK&XUYHVDQG5HYR
Mixing(
TH-CURVE, PIT-CURVE, REVO. MIX
IRULGOHXSVVHHS
D/R
,
EXP
: see p. 39.