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FenixS– user's manual
Document Revision: 1.0
September 2021
10 Flying with FenixS
To get the best out of the unit, it is import ant that some preparation is done prior to the flight.
Pre-flight preparation will ensure that the flight will be both successful and enjoyable.
10.1 Before take-off
- Switch the unit ON at least 3 minutes before take-off (this will ensure sufficient GPS reception
if external GPS module is connected).
10.1.1 Set Elevation
The pilot should set elevation of airport if he wish to fly QNH mode of set elevation to 0 to fly
QFE.
10.1.2 Set QNH
The pilot should input actual QNH value of the entered elevation. This will allow pilot to adjust
daily pressure during the day to have correct altitude information during the flight.
10.2 During flight
The unit hardware and firmware concept are so far optimized that the pilot doesn't spend too
much time to operate the unit during flight. A very significant indication that shows that the
unit has changed to flying mode is Logbook replacement with Statistics page.
10.2.1 Set QNH
Change of QNH in main page quick setup menu will adjust altitude reading to actual QNH set-
ting.
10.2.2 Wind calculation
Unit is able to measure wind under circling method. Wind calculation results are shown on wind
indicator which is part of many pages.
Circling: Calculation is based on ground speed change due to wind influence in circling. The
method is active exclusively during climbing process. The process start automatically after circ-
ling is detected. The method is based on fact that the ground speed is affected by the wind. GS
is maximal by tailwind and minimal by head wind. This phenomenon is used by GS difference
calculation method.
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