Low Batt. Volts
: During on start phase the fadec
check the battery voltage, and abort the start if the
voltage falls below this setting. Once the engine is
running, the FADEC ignore this voltage and keep the engine running until the battery is
fully depleted.
Starter Power at Ignition
: Sets the power applied to
the starter during ignition phase. The power should be
enough to assure a correct bendix engagement but not excessive to avoid to overload the
starter and fadec, and to have the rotor turning too fast to blow the starting gas away.
Ignition MAX RPM:
Sets the rpm where the starter
will be switched off during ignition phase.
Ignition MIN RPM
: Sets the rpm where the starter
will be switched ON again during ignition phase. Do not
set below 2000 nor equal or higher than the “
Ignition
MAX RPM
”
Preheat time
: Sets the time that the fadec wait after
detecting ignition before to begin the fuel ramp to give
time to the combustion chamber to warm-up and the pump to start.
Starter Power at preheat
: Sets the power applied to
the starter during the preheat time. The value usually
is the same as “
Starter Power at Ignition”
, but in
some engines could be necessary to have higher power.
RPM 100% Starter
: The power applied to the starter
during the fuel ramp phase is increased accordingly to
the real rotor RPM to keep the starter torque constant
over all rpm margin. The minimum power is set trough the “
Starter Power at preheat”
and the maximum (full battery voltage to the starter) is applied when the rotor arrive to
the RPM set on this parameter. Usual values are a 80% of the “no load” RPM of the starter
motor at full battery voltage. This feature allows using small/ low voltage rated starter
motors without the risk of burning them due at too much power in the low speed range.
RPM OFF Starter
: Rotor RPM where the starter is
switched off, usually at 90% of “no load” RPM of the
starter motor at full battery voltage.
RPM to reconnect Starter
: If after the starter
switch off the rpm of the rotor fall below this setting,
the starter is switched on again. This is not a normal
condition, if it does happen, then the fuel flow from the pump should be increased.
(Increase the “pump start point” 1 unit).
Always set this value at least 2000 rpm below than the “
RPM OFF Starter”.
