Heli-Specific Advance Menu Functions; Throttle Hold (Th-Hold) - FUTABA 7CAP Instruction Manual

HELI-SPECIFIC ADVANCE MENU FUNCTIONS

THR-HOLD: This function holds the engine in the idling position and disengages it from the T
E (7CH) or G (7CA) is moved. It is commonly used to practice auto-rotation.
Adjustability:
Idling position: Range of -50% to +50%centered about the throttle idle position to get the desired engine RPM.
Rudder offset: Offsets the tail rotor pitch. Keeps the fuselage from rotating in throttle hold.
Switch assignment: Assigned to S
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 pitch range of -4° to +6° to +12°, is
automatically activated with THR-HOLD .
Revo. mix: Since revo. mix adjusts for torque from the engine, no revo. mix is available for THR-HOLD .
Priority: The throttle hold function has priority over idle-up. Be sure that the throttle hold and idle-up S
desired positions before trying to start the engine. (We recommend starting your engine in throttle hold for safety reasons.)
GOAL of EXAMPLE:
Set up throttle hold.
Determine desired throttle position by
idling engine, turn on THR-HOLD, and
adjust percentage as required to reach
the desired running point.
Where next?
Prior to setting up THR-HOLD, hook up the throttle linkage so that the carburetor 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 T
position, then move the hold S
until the servo does not move. To lower the engine idle speed, or if you want to shut
off, input a more negative number.
G (7CA) or E (7CH) down. Not adjustable.
WITCH
STEPS:
Open THR-HOLD function.
Activate the function.
Set desired engine position.
Optional: set up a rudder offset.
Close.
PIT-CURVE for THR-HOLD: see p. 69.
GYRO setup: see p. 72.
Setting up the Idle-Ups: Throttle and Collective pitch Curves and Revo. Mixing
(TH-CURVE, PIT-CURVE, REVO. MIXING) for idle-ups: see p. 69.
D/R,EXP: see p. 34.
67
HROTTLE
on and off and keep changing the offset value
WITCH
INPUTS:
for 1 second.
to THR-HOLD.
to desired percent.
to OFF .
S when S
TICK WITCH
S to the idle
HROTTLE TICK
are in the
WITCHES
(If basic,
again.)
to OFF .
to desired offset.