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Two examples:
Example 1 –
Hold-Speed
function
SpdCtrl SW0 Act
assigned to “
Hold-Speed
” and
AUX
switch set in the
SW0
position:
a) Flight speed is measured and stored, when the
AUX
switch is moved to the
SW0
position.
Thrust is then regulated automatically, to maintain this memorized speed, despite the
throttle stick position. This regulator function is turned off immediately, by returning the
AUX
switch to the
SW1
position (normal
thrust control
).
b) If this function is activated while flight speed < 40 km/h, turbine will shut off, immediately
(normal
Off
function).
Example 2 –
Linear speed
regulation
SpdCtrl SW2 Act
assigned to “
Lin-SpeedCtrl
” and
AUX
switch set in the
SW2
position:
Cruise Control
mode becomes active, featuring linear speed regulation to the throttle stick
position.
a) The minimum throttle stick position corresponds to the parameter “Min AirSpeed” and the
maximum throttle stick position corresponds to the parameter “Max AirSpeed”.
b) If flight speed < 40 km/h when this function is activated, the turbine will shut off (normal
AutoOff
function).
Airspeed Sensor
Mounting:
Experiments indicate that the
Airspeed Sensor
is more accurate when the pitot tube is side-
mounted on the widest part of the fuselage. In this configuration, the pitot tube should stand off
from the fuselage, by at least two (2) inches. Because each model installation is different,
Golden West Models and JetCAT will have additional mounting information for review, as
auxiliary data becomes available.
Hold Speed and Cruise Control limitations:
Under normal circumstances, the
Airspeed Sensor
is primarily used for limiting the maximum
flight speed and/or recording the maximum and average speeds of the model. Nonetheless,
Hold Speed
and
Cruise Control
modes are clever additions. These modes require evaluating
and adjusting the PID parameters in the
limits
menu, while flying the model with a different
technique. The slower reaction time of the throttle response necessitates executing smoother
patterns, with limited pitch changes. Experimenting will identify how the turbine will react and
help ascertain how to compensate for its limitations.
> 2 inches
Fuselage
