Page 34/39
Airspeed Sensor
The optional
Airspeed Sensor
consists of a pitot tube and a precision, differential pressure
sensor. By sampling the ambient air temperature, the current flight speed of the model is
calculated by the ECU, from the measured difference in static versus dynamic pressure.
When the ECU is used without the
Airspeed Sensor
, it is set in
thrust control
(normal) mode.
In this mode, the throttle stick directly alters turbine thrust.
When the
Airspeed Sensor
is plugged into the ECU, it automatically establishes
speed control
mode. In
speed control
mode, the turbine thrust is automatically controlled – to keep the
model at a predetermined speed and/or to limit the model’s maximum speed.
Speed control
mode features several functions:
•
measurement and storage of maximum and average flight speeds
•
automatic restriction of maximum flight speed
•
maintenance of current flight speed (fixed "
Cruise Control
”)
•
regulation of flight speed, analogous to throttle stick position (adjustable "
Cruise Control
”)
