mustafagander,
Yep, true enough (I'm a big jet pilot (if you call the A320 big!!) so I should have thought of that!). It's probably true to say that most aeroplanes lift off below Vimd however, to be fair, I did say how many of us routinely operate on the back side of the drag curve. Two minutes spent accelerating through it during a six hour sector doesn't count!!
I also seem to recal that in jet aeroplanes best rate of climb is achieved at 1.32 vimd and best angle at Vimd so being below Vimd will do nothing for climb performance. Rotating below Vimd will allow you to leave the ground sooner and so use less runway if you have sufficinent thrust to acellerate against the high drag!
What is Vimd for your big jet in the take off configuration? Is it published anywhere? I know the Vimd for my Airbus clean (Green dot speed) but I don't know what it is with flaps, slats and landing gear hanging in the breeze! Remember, an increase in zero lift drag (eg landing gear) will lower the Vimd!
I read Mayor's question as refering to stady state normal flight manouvres which are taught to a student in IF training; in these circumstances power plus attitude = performance as I said.
FLCH; don't lets get started on the power = glidepath and attitude = speed debate!! I can't stand it!!
3 point