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#2 [↑][↓] 21-02-2012 22:13:47
Re : Question technique sur la vitesse verticale
salut,
Réponse de mon DVD ATPL :
There are three other systems for finding vertical speed. If the aircraft has a modern strap-down IRS then vertical acceleration and velocity will be available from that system. Check in Chapter 6 on IRS.
Secondly, if barometric height is available in electronic form from an ADC then the rate of change of height can be calculated and displayed as vertical velocity. Finally, there is an instrument called a dynamic vane VSI in which the difference between static and metered static pressures induces a flow over moveable vanes, rather like a small air turbine. The movement of the vanes then records vertical speed.
In practice a modern transport aircraft will use one of the two electronic systems, driven by the ADC or the IRS.
Après pour répondre exactement si ADC ou IRS, faut dire le type d'avion ...
A+, Antoine
Mon blog : http://blog.arogues.org
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#3 [↑][↓] 21-02-2012 22:14:27
Re : Question technique sur la vitesse verticale
Garmin G1000
AIR DATA COMPUTER (GDC)
The Air Data Computer (ADC) compiles information from the airplane's
pitot/static system. The ADC unit is mounted behind the instrument
panel, just forward of the MFD. An outside air temperature probe,
mounted on top of the cabin, is connected to the ADC. The ADC
calculates pressure altitude, airspeed, true airspeed, vertical speed and
outside air temperature.
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#5 [↑][↓] 21-02-2012 22:27:03
Re : Question technique sur la vitesse verticale
L'AHRS (Attitude and Heading Refence Système) n'a rien à y voir.
Sinon, une réponse ... à côté : le calcul de la vitesse verticale vient des ADC.
La source réelle étant évoqué dans les mails précédents : pitot/statique classiques, dynamic vane VSI ...
My 2 cents,
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