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Es/de Havilland Canada DHC-6 Twin Otter: Difference between revisions
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Es/de Havilland Canada DHC-6 Twin Otter (view source)
Revision as of 12:08, 23 May 2020
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Los deflectores de admisión también dependen del sistema neumático, pero no de las válvulas de sangrado. A cambio, requieren de una velocidad de la turbina de gas (''GG RPM'', también llamada "N2" o "Ng") por encima del 80%. | Los deflectores de admisión también dependen del sistema neumático, pero no de las válvulas de sangrado. A cambio, requieren de una velocidad de la turbina de gas (''GG RPM'', también llamada "N2" o "Ng") por encima del 80%. | ||
=== Sistema de pitot === | |||
El sistema de pitot es esencial para un vuelo seguro, a pesar de controlar un único instrumentoÑ el indicador de velocidad (''ASI'' por sus siglas en Inglés, ''Air Speed Indicator''). En caso de fallo del ''ASI'', no hay otra forma de conocer la velocidad de la aeronave respecto al aire y es fácil llegar a entrar en pérdida y estrellarse. | |||
The Twin Otter has two indepentently working pitot systems. The left pitot system feeds the pilot's ASI and the right pitot system feeds the copilot's ASI with dynamic pressure. | |||
The two pitot tubes are located on the side of the fuselage in front of the pilot's (resp. copilot's) door. Make sure you removed the pitot tube covers from the pitot tubes prior to the flight or your ASI won't indicate your airspeed but act similar to an altimeter as in this case only static pressure is provided. | |||
If you notice some odd behaviour of the ASI in flight (e.g. accelerating in climb and decelerating in descent) this is a strong indication of a iced pitot tube. Switch on the pitot heat to prevent icing. | |||
=== Static system === | |||
There are three instruments that work with static pressure: Airspeed indicator (ASI), altimeter (ALT), and vertical speed indicator (VSI). The Twin Otter has a total of four static ports which are located in front of the cockpit doors, two on each side. As they are not pointing into the airstream they are not in danger of icing. | |||
Now what happens in case of an failure of the pitot and/or the static system? | |||
{| class="wikitable" | |||
|- | |||
!Instrument | |||
!Static failure | |||
!Pitot failure | |||
!Both failure | |||
|- | |||
!VSI | |||
|fixed at 0 | |||
|normal indication | |||
|fixed at 0 | |||
|- | |||
!ALT | |||
|fixed at current value | |||
|normal indication | |||
|fixed at current value | |||
|- | |||
!ASI | |||
|Ascent: indicates too slow | |||
Descent: indicates too fast | |||
|Ascent: Indicates too fast | |||
Descent: Indicates too slow | |||
|fixed at current value | |||
|} | |||
[[de:de Havilland Canada DHC-6 Twin Otter]] | [[de:de Havilland Canada DHC-6 Twin Otter]] | ||
[[en:de Havilland Canada DHC-6 Twin Otter]] | [[en:de Havilland Canada DHC-6 Twin Otter]] | ||
[[fr:de Havilland Canada DHC-6 Twin Otter]] | [[fr:de Havilland Canada DHC-6 Twin Otter]] | ||