The 777 has autothrottle wake up, ie when the aircraft approaches a stall the power comes on automatically to almost full power. This gives pilots great confidence however autothrottle wake up is inhibited in FLCH.
Can someone who flies/flew 777 and FBW Airbus, an insight into the similarities/differences between this and 'Alpha Floor' would be appreciated...
For the 777 guys not familiar with Alpha Floor, a summary
Alpha Floor is a low speed protection (in normal law) which is purely an autothrust mode. When activated, it provides TOGA thrust. As the aircraft decelerates into the alpha protection range, the Alpha Floor is activated, even if the autothrust is disengaged. Activation is roughly proportional to the rate of deceleration.
Alpha Floor is inhibited:
* below 100 feet radio Altitude,
* if autothrust unserviceable,
* following double engine failure on an A340 (or one engine out on the twins),
* following certain system/auto flight failures,
* above Mach 0.53.