Airbus Alpha Floor Protection

As the aircraft decelerates into the alpha protection range the alpha floor is activated even if the autothrust is disengaged.

Airbus alpha floor protection.

Alpha floor is a low speed protection in normal law which is purely an autothrust mode. Alpha floor is also triggered if the pilot applies a large aft stick input while either pitch attitude or angle of attack protection is active. If high angle of attack protection is active the bank angle is limited to. The alpha protection officially called the high angle of attack protection is not only a feature of the a330 but also a320 a340 a350 and a380 and it s one of the five main protections that airbus introduced to keep the flight safely insid.

A low energy warning alerts pilots when airplane energy is insufficient to achieve a climbing flight path through pitch control alone. When activated it provides toga thrust. This protection triggers the application of toga thrust and the aircraft will start to climb at a relatively constant low airspeed. Air france flight 296 was a chartered flight of a new airbus a320 111 operated by air france for air charter.

When alpha exceeds alpha prot elevator control switches to alpha protection mode in which angle of attack is proportional to sidestick deflection. Alpha max will not be exceeded even if the pilot applies full aft deflection. Alpha floor protection is inhibited in some cases. The flight controls on the airbus a330 for example are all electronically controlled and hydraulically activated.

The speed speed speed voice alert repeats every 5 seconds while the condition exists. High angle of attack protection alpha. Airbus aircraft designs after the a300 a310 are almost completely controlled by fly by wire equipment. The system automatically increases the thrust of the aircraft when speed is predicted to reach or exceed the critical angle of attack.

From the airbus fast magazine 20 refer to flight manuals for latest info. If alpha prot is reached and the pilot still maintains aft sidestick alpha floor protection set between alpha prot and alpha max will be reached. Alpha floor protection a system designed to prevent an aircraft from reaching very near its critical angle of attack because of slowing down too much. On 26 june 1988 it crashed while making a low pass over mulhouse habsheim airport icao airport code lfgb as part of the habsheim air show.