AF447 Thread No. 3

[bearfoil]

Hi Chris

I asked that a while ago, and reading your question, I think I may be misinformed. I had always thought the purpose of Aft Trim Tank, or even "geographic" changes to enhance aft trim were intended to add Drag, "Lift" to the tail such that the AoA of the wing could be reduced, and lower Fuel Burn. It is a slight Overall reduction in Drag, but on long haul can save buckets of dough. Was I laboring under a misconception?

I suppose it could be viewed similarly, as the reduction in AoA of the HS reduces Drag also? I see you added to your post, so I will ask another question in reference to your ad.


"...The natural tendency of the nose to drop as the speed decayed was counteracted by increasing nose-up trim, provided by the THS in autotrim right up to the stall and beyond...".

So now we know the Airbus does use PITCH to control SPEED ? And does it do this with Autotrim (PITCH) with the Throttles in "manual" (A/THR disconnect). Could the a/c ever have autotrim without Autothrottle?