Hi all pprune member,
Yesterday, I have read the FADEC system in MD11. Everything seems to be OK.
However, there're one part that said the FCC send the various data such as
the N1 or EPR trim, Bleed Config, Flap position, Weight on nose wheel, GMT, and DATE.
I understand the purpose of the nose wheel and flap config but not for
GMT and DATE. Is the GMT mean Greenwich Mean Time or something else and
does the DATE mean the Dynamics, Acoustics and Thermal Environment?.
If so why the engine require those information in order to operate?
- Also, for a given throttle setting as the environment around the engine has change.
Does the FADEC advance the engine RPM automaticly according to the throttle position?
For example, if throttle is at about 80%, engine in climb rating and when the
plane climb the N1 limit is lifting and the FADEC order the engine to speed up
in order to maintain the 80% thrust rating.
- Does the FADEC manipulate the bleed valve [either LP or HP or both] in
order to maintain the minimum air pressure that the system need or the
HP valve just kick in if the anti ice is use or the N2 is drop below the setting value like the B767.
- What is the purpose of the fin that seems to be extend from the rudder to the Engine NO.2.
Is it job is to induce the laminar flow over the root of the rudder and engine cowling or does it help the plane become more stable?
Photos: McDonnell Douglas MD-11/ER Aircraft Pictures | Airliners.net
Sorry for a long question and thanks for all of your reply.
Best regards