4 ms·
Autothrottle is not in speed mode for any transport category airplane on takeoff. You set a thrust demand and it maintains that. The V2 speed is achieved by pi
by t0mas88 6y ago
Autothrottle is not in speed mode for any transport category airplane on takeoff. You set a thrust demand and it maintains that.
The V2 speed is achieved by pitching for that specific airspeed, followed by an acceleration phase and flap retraction schedule if necessary.
Source: I'm a commercial pilot
- aaronmdjones 6y agoYes, that's depicted in the video I linked (THR REF is thrust mode). I didn't mean to imply that the autothrottle will only stay at V2 speed, but rather that the automation won't go below it.
- t0mas88 6y agoBut that's my point, automation doesn't hold V2 for you. On engine failure during takeoff you immediately disconnect the autopilot, then manually stabilize the yaw with rudder, adjust thrust and retract gear (and flaps in steps). Then manually fly the climb at V2 speed. All the automation does is indicate the correct speed on the PFD speedtape to help you decide what to do.