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Instruction manual JetCat-PRO engines, 1.7 - V12.01V
Throttle Curve
Throttle stick curve, factory setting is 3.0. Herewith the thrust and the throttle stick
position proceed slightly logarithmic (higher response at the idle range compared to the
full throttle range of the throttle stick/commanding). At the value of 2.0 the thrust will
proceed exactly proportional to the throttle stick position. This parameter can be used to
tune the throttle command to thrust curve in a very wide range. See also page: 37
ThrustReduFactor
This parameter allows to automatically reduce the engines thrust in relation to the
weight of fuel burned.
At a programmed value of 1.0 the engines thrust would be reduced such that it exactly
compensates for the weight (force) of the amount of fuel burned up to this moment.
For hovering applications this function can help to automatically reduce thrust and
compensate for the weight loss of the system by fuel burned/consumed.
Per default this value is set to 0, which effectively disables this function. The lower the
value is set the lower the effective thrust reduction will be computed. Values higher than
1.0 will result in an overcompensation.
Simulate engine
Enable or disable Simulation mode. If set to “enabled” engine will not be run in real,
Rpms / EGT etc. is internally simulated. Pump/Starter/valves are disabled in this mode.
This allows e.g. to test the serial communication without hot running the engine.
Only available if operation mode is not set to “RC-model”!
Engine CrossChk
This function allows to interchain two engines with each other via the secondary serial
interface (
Tx2/Rx2, null modem cross over connection). In this configuration every
engine then “knows” the operation state/rpm/thrust etc. of its “partner engine” and vice
versa. Typically, this is used to synchronize two engines and/or to keep their thrust
differentials within a preset safe margin. For this option to work correctly it must be
ensured that the “Slave-address” value (see below) is set to different values on the two
engines communicating with each other (e.g. engine #1 Slave-address set to 1, engine #2
Slave-address set to 2)
Also, it will be ensured that the control would only be handed over to the pilot if both
engines are started up and running at idle.
"DISABLED”:
This disables the cross-checking function, default
"ON; OFFOnFail ":
This enables the crosschecking function, if the other engine should
turn off by any reason, the “partner engine” would also be switch off. Also, if the
communication cable should be interrupted, this would result in an engine shut down.
"ON; ContOnFail":
This enables the crosschecking function, if the partner engine should
turn off by any reason, the engine would not be turn off, but would be auto limited on
thrust according to below setting of the “
Max-ThrustDiff”
value.
"Heli-Syncronis":
This option is used to synchronize a pair of two-shaft engines which
are connected/driving to the same output shaft and have the shaft regulator function
activated (typical twin-engine helicopter configuration). This option will avoid that one of
the two engines, over time might take a larger portion of the load, whilst the other one
is getting lazy (=applying less power).
Only applicable for two-shaft engines!
Max-ThrustDiff
Desired maximum thrust differential value in Newtons for the cross-check function
The engine which produces more thrust than its linked partner engines thrust plus the
differential value would be de-rated such in rpm to match the condition. Only available if
“Engine CrossChk” is not set to “Disabled”
