Acoustic support for speed sensors from Jeti and third-party vendors (e.g. SM GPS Logger 3 with TEK nozzle).
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YouTube Demo:
In the YouTube demo, it can be observed that a distinction is made (automatically!) between the phases “Start” and “Flight.” During the “Start” phase, “v1” (maximum speed for takeoff abort) and “rotate” can be announced.
In the “Flight” phase, the approach to the critical minimum speed is represented acoustically. If the threshold of the critical speed is undershot, the tones become distinctly more urgent.
When selecting the switch for the flaps in the settings, different minimum speeds can be chosen for various flap configurations.
When using my app “calca-Gas” simultaneously, the minimum speeds can be adjusted according to the weight of the aircraft. The input values refer to a configuration with 20% remaining fuel. Between 0 and 100% fuel level, the speeds are increased or decreased depending on the entered percentage. A value of 5 to 10% for a jet has proven effective for me. For aircraft with a gasoline engine, I would leave the value at 0% and forego weight correction.
Setup
Incorporate calca-Speed into the telemetry display.
Select the speed sensor, then optionally choose the flap position so that two “x” are displayed when the flaps are retracted.
The source unit of measurement for Jeti is always “meters per second,” while for the GPS Logger, it is “km/h.”
If necessary, set a switch to mute the audio tones.
For simulation, select a switch and choose a potentiometer for “Speed”. The switch (here “P7”) must be configured for proportional 0-100% range.
Set the speeds, leave “v1” and “rotate” at 0 if not desired.
Under “Spread” you can make the warning levels narrower or wider. (With a higher value, the warning would trigger very early.)
If calca-Gas is installed, the warnings in the “Flight” phase can be adjusted with a weight correction. In this example, the minimum speed with full load and flaps 2 would be raised from 60 to approximately 62 km/h. With an empty tank, it would be around 59 km/h.