user manual

Page 29

Idle speed: Set the RPM that the engine will run when the FADEC receive IDLE

Command. While the engine is running, the FADEC will adjust the rotor speed

accordingly the throttle position in a closed loop system. (45,000 for the K-80 and

36,000 for the K-170)

STOP speed: Set the minimum RPM that the engine is allowed to run. The FADEC will

shut down the engine if the rotor speed is below this setting. (30,000 for the K-80)

Start/Min temperature: Set the minimum temperature that the engine is allowed to

run, and in manual start operation, sets the temperature from which the pump begin

to run. 100 DEG C

Maximum temperature: Set the maximum temperature that the engine is allowed

to run. The FADEC will reduce the acceleration rate if the EGT approaches to

maximum and will reduce the pump power if necessary to keep the temperature

below the maximum, but it don’t will cut the engine if the temperature is too high, it

will try always to keep the engine running by reducing the fuel flow . 850 DEG C

Acceleration delay: Set the acceleration time on the engine. Higher values, longer

acceleration times. The real acceleration time is calculated using a complex algorithm

that take in to account this value, temperature, current RPM, commanded RPM, and

the tendency of EGT and RPM.

Deceleration delay: Similar to the acceleration, but used during throttle down.

Higher values mean slower deceleration.

Stability delay: When the engine is running at constant throttle setting, the FADEC

is adjusting continuously the pump power so that the rotor RPM mach exactly with the

throttle signal. The speed of witch the fadec adjust the pump power is set by this

parameter. A value of 100 usually is the best for all engines. A too low of a value

can cause instability on the RPM.

Pump Limit: The Fadec can give to the pump the full battery voltage, but in most

cases the voltage needed for the pump is only a fraction of the full battery voltage.

Limiting the pump give a much smoother control of the engine and prevents that the

pump could receive excessive voltage in the case of a problem in the fuel circuit, a

clogged filter for example. This excessive power will cause a high pressure on the