Back- Up Speed Scale (BUSS) in new Aircraft
Back- Up Speed Scale (BUSS)✈️✈️✈️
In order to decrease the crew workload in case of unreliable speed, Airbus has developed the Back- Up Speed Scale (BUSS) that replaces the pitch and thrust tables. The BUSS is optional on A320/A330/A340. It is basic on A380, being part of the ADR Monitoring functions.
This indication is based on angle of attack (AOA) sensor information, and is therefore not affected by erroneous pressure measurements.
The BUSS comes with a new ADIRU standard (among other new system standards), where the AOA information is provided through the IRs and not through the ADRs. This enables selecting all ADRs off without losing the Stall Warning Protection.
The AOA information provides a guidance area in place of the speed scale. When the crew selects all ADRs OFF, then:
• The Back-Up Speed Scale replaces the PFD
speed scale on both PFDs,
• GPS Altitude replaces the Altitude Scale on both
PFDs.
The Back-Up Speed Scale then enables to fly at a safe speed, i.e. above stall speed and below maximum structural speeds, by adjusting thrust and pitch.
Post a Comment
Spam Not Allowed. We accepting Guest Posts. Any Doubts write us mail@kasworld-aero.ml