Alternate Law Alpha Floor

In alternate law when the landing gear is extended the flight control system reconfigures to direct law.

Alternate law alpha floor.

Alpha floor is also triggered if the pilot applies a large aft stick input while either pitch attitude or. The amber and black strip rises to the actual speed of the aircraft. Pitch attitude protection is lost. V alpha prot and v alpha max are removed.

Pitch alternate the pitch alternate law provides load factor demand mode load factor limitation high speed stability low speed stability protections and load alleviation function on some a320s. Alpha floor is a function of normal law called a protection in the a330 that commands both full thrust and dynamic limits on any aft side stick inputs to prevent alpha angle of attack increasing above the critical angle of attack and stalling the wing. Load factor and bank angle protections are retained. If the aircraft is operated outside the normal flight envelope the pilot must take appropriate corrective action to avoid losing control and or to avoid high speed excursions since the normal law protection features may not be available.

In addition an audio stall warning is introduced. To ga thrust is provided regardless of thrust lever position. Refer low speed stability. The va floor function which normally occurs at a predetermined angle of attack between alpha protection and alpha max engages the auto thrust system.

V ls remains displayed. Roll direct roll direct law is a. Alternate law 113 9 a 9 9 9 14 9 915 9 alternate law 216 9 a 17 918 919 9 degraded 20 degraded 21 direct law22 a 23 924 925 degraded mech backup26 no protections available a alpha floor is lost. Send alpha alternatives is a multi asset class asset management firm that creates sophisticated investment solutions for proprietary and client capital.

The aircraft can also enter alpha protection at high altitude where it protects the aircraft from the buffet boundary. Alpha floor protection is inhibited in some cases. The pfd airspeed scale is modified. During landing alternate law reverts to direct law at 100 ft ra.

Airbus aircraft are fly by wire which is to say the pilot has no direct control over the control surfaces elevators ailerons rudder. Normal and alternate law is a feature specific to airbus aircraft. Normal law alpha floor. The airplane can be stalled in alternate law.

High speed and high angle of attack protections enter alternate law mode. The pfd shows that alpha protection is active in the same way as at low speed and low level. α floor protection is not available so conventional pilot stall recovery action is required. An audio stall warning consisting of crickets and a stall aural message is activated.

34th floor sunshine tower senapati bapat marg dadar west mumbai 400 013. At low speed a nose down demand is introduced based on ias instead of aoa and alternate law changes to direct law. Aoa is still monitored but warnings relate now to stall speed rather than aoa.